use wayland_client::QueueHandle;
 use cce_ui::cosmic_text::FontSystem;
 
 use cce_ui::engine::{Application, LogicalPosition, LogicalSize, WindowSettings};
 use cce_ui::widget::{MouseButton, ElementState, MouseScrollDelta, KeyEvent, WidgetHost, PageSelector, Paginator, MenuController};
 use cce_ui::widget::{GraphController, PathController};
 
 use notify::{Watcher, RecommendedWatcher, RecursiveMode, Config};
 
 use cce_files::{Message, pages, services};
 use cce_files::pages::Page;
 use cce_files::pages::browse::is_project_dir;
 
 // ── Layout constants ────────────────────────────────────────────────
 
 const ROW_H: f32 = 24.0;        // context-menu / breadcrumb row height
 const DIALOG_W: f32 = 400.0;
 const DIALOG_H: f32 = 160.0;
 const MENU_MIN_W: f32 = 120.0;
 
 /// Context-menu width/height for a given set of options.
 ///
 /// The width comes from the SHAPED widest label in the menu font — the same
 /// face [`cce_ui::widget::context_menu`] uses for the toolkit's own menus.
 /// The old `bytes * 7.5` estimate belonged to neither face, so the plate was
 /// sized for a font nothing here draws in.
 fn context_menu_size(options: &[(String, Option<Message>)]) -> (f32, f32) {
     let (family, size) = cce_ui::widget::context_menu::label_font();
     let widest = options
         .iter()
         .map(|(s, _)| cce_ui::widget::display::measure_text_width(s, &family, size))
         .fold(0.0f32, f32::max);
     // TODO(style): 24 is the menu's own label side-padding (12 a side), a
     // control-level number the toolkit's context_menu should supply.
     let w = (widest + 24.0).max(MENU_MIN_W);
     let h = options.len() as f32 * ROW_H;
     (w, h)
 }
 
 /// Computed rects for the "Open with…" modal, so layout and hit-testing agree.
 struct OpenWithRects {
     x: f32,
     y: f32,
     w: f32,
     h: f32,
     tb: (f32, f32, f32, f32),
     cancel: (f32, f32, f32, f32),
     open: (f32, f32, f32, f32),
 }
 
 fn open_with_rects(win_w: f32, win_h: f32) -> OpenWithRects {
     let x = (win_w - DIALOG_W) / 2.0;
     let y = (win_h - DIALOG_H) / 2.0;
     let tb_h = cce_ui::layout::textbox_height();
     let btn_h = cce_ui::layout::button_height();
     // The dialog is a pane plate standing on the root: its content insets
     // from the rim by the pane rung, and its two buttons sit one pane gap
     // apart, right-aligned to that inset.
     let pad = cce_ui::layout::plate_padding();
     let gap = cce_ui::layout::plate_gap();
     let (cancel_w, open_w) = (70.0, 80.0);
     let btn_y = y + DIALOG_H - btn_h - pad;
     let open_x = x + DIALOG_W - pad - open_w;
     OpenWithRects {
         x,
         y,
         w: DIALOG_W,
         h: DIALOG_H,
         // TODO(style): the 60px drop to the well (title, then the prompt at
         // 42) is the dialog's own text rhythm, not a rung.
         tb: (x + pad, y + 60.0, DIALOG_W - 2.0 * pad, tb_h),
         cancel: (open_x - gap - cancel_w, btn_y, cancel_w, btn_h),
         open: (open_x, btn_y, open_w, btn_h),
     }
 }
 
 /// Clip a vertical span `[y, y+h)` to the viewport `[top, bottom)`.
 /// Returns the clipped `(y, h)`, or `None` if fully outside.
 fn clip_to_viewport(y: f32, h: f32, top: f32, bottom: f32) -> Option<(f32, f32)> {
     if y >= bottom || y + h <= top {
         return None;
     }
     let mut ny = y;
     let mut nh = h;
     if ny < top {
         let diff = top - ny;
         ny = top;
         nh = (nh - diff).max(0.0);
     }
     if ny + nh > bottom {
         nh = (bottom - ny).max(0.0);
     }
     Some((ny, nh))
 }
 
 /// Which side of an occluder a box's surviving span lies on, and where the cut
 /// falls — see [`wider_side`].
 enum Side {
     /// Keep what lies before the occluder: clamp the box's far edge to this.
     Before(f32),
     /// Keep what lies after it: clamp the box's near edge to this.
     After(f32),
 }
 
 /// On one axis, which side of the occluder leaves more of the box — the piece
 /// worth keeping when only one can be. `None` when the occluder covers the span
 /// outright and neither side survives.
 fn wider_side(t_min: f32, t_max: f32, o_min: f32, o_max: f32) -> Option<Side> {
     let before = o_min - t_min;
     let after = t_max - o_max;
     if before <= 0.0 && after <= 0.0 {
         return None;
     }
     if before >= after {
         Some(Side::Before(o_min))
     } else {
         Some(Side::After(o_max))
     }
 }
 
 /// Clip a text/label box against overlay rects so it does not bleed through
 /// popovers/menus/dialogs. Returns the adjusted clip bounds, or `None` if the
 /// box is fully covered (should be discarded).
 fn occlude_against(
     mut bounds: [f32; 4],
     t_min_x: f32,
     t_max_x: f32,
     t_min_y: f32,
     t_max_y: f32,
     overlays: &[&pages::PageContent],
 ) -> Option<[f32; 4]> {
     for overlay_pc in overlays {
         // Plates occlude exactly as rects do — an overlay's opaque face is its
         // plate now, not a flat fill, and a face missing from this sweep lets the
         // page's text bleed through the surface covering it.
         let faces = overlay_pc
             .rects
             .iter()
             .map(|(_, x, y, w, h, _, _)| (*x, *y, *w, *h))
             .chain(overlay_pc.plates.iter().map(|(_, x, y, w, h, _, _)| (*x, *y, *w, *h)));
         for (ox, oy, ow, oh) in faces {
             let o_min_x = ox;
             let o_max_x = ox + ow;
             let o_min_y = oy;
             let o_max_y = oy + oh;
 
             if t_max_x > o_min_x && t_min_x < o_max_x && t_max_y > o_min_y && t_min_y < o_max_y {
                 if t_min_x >= o_min_x && t_max_x <= o_max_x && t_min_y >= o_min_y && t_max_y <= o_max_y {
                     return None;
                 }
                 // Cut on ONE axis, on ONE side. The result of subtracting a rect
                 // from a rect is not a rect, so this picks the largest piece that
                 // is: trim x, unless the occluder already spans the box
                 // horizontally and only a y cut can uncover anything.
                 //
                 // Clamping every side independently is what this used to do, and
                 // two clamps on one axis cross over into an inverted, empty band —
                 // so a box the occluder merely dipped into vanished whole, the
                 // part nothing covered along with the rest. That is how hovering a
                 // context-menu row erased the file-list row beside it: the hover
                 // fill's top edge landed inside that row's text band, and the y
                 // clamp it triggered threw away the name sitting well clear of the
                 // menu.
                 if o_min_x <= t_min_x && o_max_x >= t_max_x {
                     match wider_side(t_min_y, t_max_y, o_min_y, o_max_y) {
                         Some(Side::Before(cut)) => bounds[3] = bounds[3].min(cut),
                         Some(Side::After(cut)) => bounds[1] = bounds[1].max(cut),
                         None => return None,
                     }
                 } else {
                     match wider_side(t_min_x, t_max_x, o_min_x, o_max_x) {
                         Some(Side::Before(cut)) => bounds[2] = bounds[2].min(cut),
                         Some(Side::After(cut)) => bounds[0] = bounds[0].max(cut),
                         None => return None,
                     }
                 }
             }
         }
     }
     Some(bounds)
 }
 
 /// Height of the chooser-mode bottom action bar (the band carved into the plate).
 const SELECT_BAR_H: f32 = 48.0;
 
 // ── State ───────────────────────────────────────────────────────────
 
 /// How a flat quad renders under the SDF-lit plate system. `Flat` is the plain
 /// fill; the relief variants carry the roll/carve depth in px.
 #[derive(Clone, Copy, PartialEq)]
 enum WidgetFx {
     Flat,
     /// A lit Bevel plate: the quad's own fill plus a rolled, lit lip (raised
     /// buttons with an opaque face).
     Bevel(f32),
     /// Edges-only raised plateau over whatever is painted below.
     Boss(f32),
     /// A lit plate: a rounded face in the quad's own color plus the rolled, lit
     /// perimeter, at full size. What the pane plates and the preview stub wear.
     /// Distinct from [`WidgetFx::Bevel`], which insets its fill by the depth, and
     /// from [`WidgetFx::Boss`], which is a rim with no face of its own.
     Plate(f32),
     /// Edges-only carve into whatever is painted below (recessed wells).
     Recess(f32),
     /// [`WidgetFx::Recess`] with pointer focus: the tinted carve — the wrapped
     /// accent glint REPLACING the relief lighting (the DE's one focus
     /// language; the shader drops the diffuse/curvature terms for tinted
     /// carves, so the ring is all that shows).
     RecessFocus(f32),
     /// A flush inset control (buttons): groove ring carved down around the
     /// rect, beveled lip back up inside, face level with the surface.
     Inset(f32),
     /// [`WidgetFx::Inset`] with keyboard focus: the rim lit in the highlight —
     /// the ring a focused control plate wears.
     InsetFocus(f32),
     /// A GPU-textured quad; the id comes from `cce_ui::vk::upload_rgba`
     /// (the preview pane's image). `color` is unused.
     Image { id: u32, alpha: f32 },
     /// A line engraved from (ax, ay) to (bx, by) into the widget's rect, which
     /// is the HOST surface here rather than the mark's own bounds — the shading
     /// fades out across the host's rolled edge. The breadcrumb's slanted seams;
     /// the only quad in this list that is not axis-aligned.
     Groove { ax: f32, ay: f32, bx: f32, by: f32, width: f32, depth: f32 },
 }
 
 struct AppWidget {
     x: f32,
     y: f32,
     w: f32,
     h: f32,
     color: [f32; 4],
     radius: f32,
     corners: (bool, bool, bool, bool),
     fx: WidgetFx,
 }
 
 #[derive(Clone)]
 struct ContextMenu {
     visible: bool,
     x: f32,
     y: f32,
     w: f32,
     h: f32,
     options: Vec<(String, Option<Message>)>,
     hovered: Option<usize>,
 }
 
 /// App-owned two-pane horizontal split, replacing the dissolved `SplitBox` +
 /// `BrowseContainer`/`NetworkContainer` shims (Phase 6y). Those existed to (a) position
 /// pane content — but the pages already lay out and render everything from the pane rect,
 /// the container copies just coincided (the Phase 0 double-paint) — and (b) own the
 /// divider: its quad, hover tint, and proportion drag. This is (b), app-side, with the
 /// `SplitBox` two-child horizontal math verbatim.
 /// Width of the preview pane's column while collapsed to its title stub:
 /// room for the label and the corner control that restores it.
 const PREVIEW_STUB_W: f32 = 170.0;
 
 struct SplitPane {
     x: f32,
     y: f32,
     w: f32,
     h: f32,
     /// Left pane's share of the space (proportions summed to 1.0 in the legacy SplitBox).
     frac: f32,
     min_left: f32,
     min_right: f32,
     gap: f32,
     dragging: bool,
     hovered: bool,
 }
 
 impl SplitPane {
     fn new(frac: f32, min_left: f32, min_right: f32, gap: f32) -> Self {
         Self { x: 0.0, y: 0.0, w: 0.0, h: 0.0, frac, min_left, min_right, gap, dragging: false, hovered: false }
     }
 
     fn set_rect(&mut self, x: f32, y: f32, w: f32, h: f32) {
         self.x = x;
         self.y = y;
         self.w = w;
         self.h = h;
     }
 
     fn left_w(&self) -> f32 {
         self.frac * (self.w - self.gap).max(0.0)
     }
 
     fn left_rect(&self) -> (f32, f32, f32, f32) {
         (self.x, self.y, self.left_w(), self.h)
     }
 
     fn right_rect(&self) -> (f32, f32, f32, f32) {
         let lx = self.x + self.left_w() + self.gap;
         (lx, self.y, (self.x + self.w - lx).max(0.0), self.h)
     }
 
     fn divider_rect(&self) -> (f32, f32, f32, f32) {
         (self.x + self.left_w(), self.y, self.gap, self.h)
     }
 
     fn hit_divider(&self, px: f32, py: f32) -> bool {
         let (sx, sy, sw, sh) = self.divider_rect();
         px >= sx && px <= sx + sw && py >= sy && py <= sy + sh
     }
 
     /// Divider drag + hover (`SplitBox::on_cursor_moved`, two-child horizontal case).
     fn cursor_moved(&mut self, px: f32, py: f32) -> bool {
         let mut handled = false;
         if self.dragging {
             let combined = (self.w - self.gap).max(0.0);
             if combined > 0.1 {
                 let new_left = (px - self.x - self.gap / 2.0)
                     .clamp(self.min_left, (combined - self.min_right).max(self.min_left));
                 let new_frac = new_left / combined;
                 if (new_frac - self.frac).abs() > 0.0001 {
                     self.frac = new_frac;
                     handled = true;
                 }
             }
         }
         let new_hovered = !self.dragging && self.hit_divider(px, py);
         if new_hovered != self.hovered {
             self.hovered = new_hovered;
             handled = true;
         }
         handled
     }
 
     /// Left press on the divider grabs it (`SplitBox::mouse_input`).
     fn press(&mut self, px: f32, py: f32) -> bool {
         if self.hit_divider(px, py) {
             self.dragging = true;
             return true;
         }
         false
     }
 
     /// Returns whether a drag was in progress (the legacy release consumed the event).
     fn release(&mut self) -> bool {
         std::mem::take(&mut self.dragging)
     }
 
     /// The divider's mark (`SplitBox::extra_quads`): accent while dragging, tint
     /// on hover, and NOTHING at rest.
     ///
     /// At rest the gap is left as bare window plate, which is what the panes
     /// either side already establish — a strip of surface between two plates,
     /// with no line drawn down it. The 1px hairline that used to sit here was
     /// the last painted separator in a UI that is otherwise all lit geometry,
     /// and against 4 logical px of clearance it read as a mark on a plain
     /// rather than as a seam.
     ///
     /// Note what this deliberately does NOT do: it does not make the divider
     /// look like the preview|details seam. That seam's floor measures ~79
     /// against this plate's 96 — it is genuinely RECESSED — and removing marks
     /// cannot recess a flush gap. Matching it would take a carve. (For the
     /// opposite mistake, see the reverted `Prim::Ridge` bead in this file's
     /// history: a crest where that seam has a trough.)
     fn divider_quad(&self) -> Option<(f32, f32, f32, f32, [f32; 4])> {
         let (sx, sy, sw, sh) = self.divider_rect();
         let color = if self.dragging {
             [0.36, 0.56, 0.38, 0.8]
         } else if self.hovered {
             [0.25, 0.25, 0.32, 0.6]
         } else {
             return None;
         };
         Some((sx + sw / 2.0 - 1.0, sy, 2.0, sh, color))
     }
 }
 
 
 /// Browse-page shortcuts, resolved once at startup from input.kdl
 /// (`cce-files` domain → `cce-ui` domain), defaulting to the historical
 /// vim-ish keys. Arrow keys, Enter-in-save-mode, and Escape stay fixed.
 struct BrowseKeys {
     open_file: String,
     enter_dir: String,
     parent_dir: String,
     select_next: String,
     select_prev: String,
     delete_entry: String,
     toggle_hidden: String,
 }
 
 impl BrowseKeys {
     fn load() -> Self {
         let get = cce_ui::input::app_chord;
         Self {
             open_file: get("open_file", "enter"),
             enter_dir: get("enter_dir", "l"),
             parent_dir: get("parent_dir", "h"),
             select_next: get("select_next", "j"),
             select_prev: get("select_prev", "k"),
             delete_entry: get("delete_entry", "delete"),
             toggle_hidden: get("toggle_hidden", "."),
         }
     }
 }
 
 /// Which recessed well holds pointer focus — the one wearing the accent ring
 /// (its relief lighting swapped for the tinted carve's wrapped glint, the
 /// same focus language as plates). Follows the last left press that reaches
 /// page content; the content well (list / treemap) starts focused.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 enum FocusedWell {
     Content,
     PreviewTop,
     PreviewBottom,
 }
 
 struct FilesystemApp {
     current_page: Page,
     browse: pages::browse::BrowseState,
     network: pages::network::NetworkState,
     space: pages::space::SpaceState,
     preview: cce_files::preview_pane::PreviewPane,
     /// See [`FocusedWell`]; drives the per-well `focused` flags each rebuild.
     focused_well: FocusedWell,
 
     // Command-line chooser options
     select_mode: bool,
     select_directory: bool,
     save_mode: bool,
 
     // Rendering resources
     widgets: Vec<AppWidget>,
     // (content, font_size, x, y, color, font, bounds) — occlusion-adjusted text tuples,
     // emitted as display-list Text prims.
     texts: Vec<(String, f32, f32, f32, [f32; 4], Option<String>, Option<[f32; 4]>)>,
     font_system: FontSystem,
     needs_rebuild: bool,
     width: u32,
     height: u32,
     scale_factor: f64,
     page_buttons: Vec<(cce_ui::widget::Adapted<cce_ui::widget::Button>, Message)>,
     hovered_button: Option<usize>,
     cursor_x: f32,
     cursor_y: f32,
     paginator: cce_ui::widget::Adapted<Paginator>,
     view_dropdown: cce_ui::widget::Adapted<cce_ui::widget::Dropdown>,
     just_initialized: bool,
     ui_context: cce_ui::context::UiContext,
     watcher: Option<notify::RecommendedWatcher>,
     fs_service: services::fs::FsService,
     /// Whether a renderer has been handed over yet — the first one is the
     /// process's own, any later one is a replacement after a reconnect. See
     /// `renderer_init`.
     seen_renderer: bool,
     context_menu: ContextMenu,
     open_with_dialog: Option<(std::path::PathBuf, cce_ui::widget::Adapted<cce_ui::widget::TextBox>)>,
     browse_split: SplitPane,
     network_split: SplitPane,
     space_split: SplitPane,
     /// The preview pane's plate-dock state (cce-ui RFC 7c-2): collapsing
     /// narrows the pane column to a title stub and the list keeps the space.
     preview_dock: cce_ui::widget::plate_dock::PlateDockState,
     /// The three splits' fracs as they stood before a collapse, restored on
     /// expand.
     preview_prior_fracs: Option<(f32, f32, f32)>,
     /// Rows of the OPEN plate-dock corner menu (empty = not ours); routed
     /// before the generic context-menu dispatch.
     plate_menu_actions: Vec<cce_ui::widget::plate_dock::PlateDockAction>,
     // Space's double-click is tracked by path, not row index: its tiles are
     // renumbered by every relayout, so an index would not survive a resize.
     last_space_click_time: std::time::Instant,
     last_space_path: Option<std::path::PathBuf>,
     last_click_time: std::time::Instant,
     last_clicked_idx: Option<usize>,
     keys: BrowseKeys,
 }
 
 
 // ── Layout Rebuild ──────────────────────────────────────────────────
 
 impl FilesystemApp {
     /// Kick off a subtree scan if the Space page is showing a directory it has
     /// not scanned. Cheap to call — it no-ops off the Space page, and while a
     /// scan for the same directory is already running.
     fn ensure_space_scan(&mut self) {
         if self.current_page != Page::Space {
             return;
         }
         let dir = self.browse.current_dir.clone();
         if !self.space.needs_scan(&dir) {
             return;
         }
         let cancel = self.space.begin_scan(&dir);
         self.fs_service.send(services::fs::FsRequest::ScanTree(dir, cancel));
     }
 
     fn start_watching(&mut self, path: std::path::PathBuf) {
         use tokio::sync::mpsc;
         use std::time::Duration;
 
         let (tx, mut rx) = mpsc::channel::<()>(100);
         let fs_service = self.fs_service.sender.clone();
         let path_clone = path.clone();
 
         tokio::spawn(async move {
             while rx.recv().await.is_some() {
                 tokio::time::sleep(Duration::from_millis(150)).await;
                 while rx.try_recv().is_ok() {}
 
                 let _ = fs_service.send(services::fs::FsRequest::RefreshDirectory(path_clone.clone())).await;
             }
         });
 
         let mut watcher = match RecommendedWatcher::new(
             move |res: Result<notify::Event, notify::Error>| {
                 if let Ok(event) = res {
                     match event.kind {
                         notify::EventKind::Create(_) | notify::EventKind::Modify(_) | notify::EventKind::Remove(_) => {
                             let _ = tx.try_send(());
                         }
                         _ => {}
                     }
                 }
             },
             Config::default(),
         ) {
             Ok(w) => w,
             Err(e) => {
                 log::error!("Failed to create watcher: {:?}", e);
                 return;
             }
         };
 
         if let Err(e) = watcher.watch(&path, RecursiveMode::NonRecursive) {
             log::error!("Failed to watch path {}: {:?}", path.display(), e);
             return;
         }
 
         self.watcher = Some(watcher);
     }
 
     /// The rect the preview pane's corner control anchors to: the full pane,
     /// or its title-stub band while stubbed (cce-ui RFC 7c-2).
     fn preview_dock_band(&self) -> (f32, f32, f32, f32) {
         let split = match self.current_page {
             Page::Browse => &self.browse_split,
             Page::Network => &self.network_split,
             Page::Space => &self.space_split,
         };
         let (rx, ry, rw, rh) = split.right_rect();
         if self.preview_dock.stubbed() {
             (rx, ry, rw, cce_ui::widget::plate_dock::STUB_H)
         } else {
             (rx, ry, rw, rh)
         }
     }
 
     fn dispatch_preview_dock(&mut self, action: cce_ui::widget::plate_dock::PlateDockAction) {
         use cce_ui::widget::plate_dock::PlateDockAction;
         match action {
             PlateDockAction::Collapse => {
                 self.preview_prior_fracs =
                     Some((self.browse_split.frac, self.network_split.frac, self.space_split.frac));
                 self.preview_dock.collapsed = true;
             }
             PlateDockAction::Expand => {
                 if let Some((b, n, sp)) = self.preview_prior_fracs.take() {
                     self.browse_split.frac = b;
                     self.network_split.frac = n;
                     self.space_split.frac = sp;
                 }
                 self.preview_dock.collapsed = false;
             }
             // No detach model here (yet): standard_menu is called with
             // can_detach = false, so these rows never appear.
             PlateDockAction::Detach | PlateDockAction::Reattach => {}
         }
         self.needs_rebuild = true;
     }
 
     fn rebuild_layout(&mut self) {
 
         // Well focus → the emitters (each picks the tinted carve when set).
         self.browse.list.focused = self.focused_well == FocusedWell::Content;
         self.space.focused = self.focused_well == FocusedWell::Content;
         self.preview.focused_well = match self.focused_well {
             FocusedWell::PreviewTop => Some(cce_files::preview_pane::PreviewWell::Top),
             FocusedWell::PreviewBottom => Some(cce_files::preview_pane::PreviewWell::Bottom),
             FocusedWell::Content => None,
         };
 
         self.ui_context.clear_hierarchy();
         self.browse.save_name_box.prepare_text(&mut self.font_system);
         self.browse.search_box.prepare_text(&mut self.font_system);
 
         let mut widgets = Vec::new();
         let mut texts = Vec::new();
 
         cce_ui::widget::hover_animation::reset_frame_registration();
         cce_ui::widget::hover_animation::set_cursor_pos(self.cursor_x, self.cursor_y);
 
         // root plate container DISSOLVED: top-level widgets register parentless below; the
         // window plate tuple is emitted in the legacy aggregate order (after the plain
         // child quads).
 
         // Clear all widgets' hierarchy links
         self.paginator.clear_children(&mut self.ui_context); self.paginator.set_parent(None, &mut self.ui_context);
         self.view_dropdown.clear_children(&mut self.ui_context); self.view_dropdown.set_parent(None, &mut self.ui_context);
 
 
         self.browse.save_name_box.clear_children(&mut self.ui_context); self.browse.save_name_box.set_parent(None, &mut self.ui_context);
         self.browse.breadcrumb.clear_children(&mut self.ui_context); self.browse.breadcrumb.set_parent(None, &mut self.ui_context);
         self.network.breadcrumb.clear_children(&mut self.ui_context); self.network.breadcrumb.set_parent(None, &mut self.ui_context);
         self.network.graph.clear_children(&mut self.ui_context); self.network.graph.set_parent(None, &mut self.ui_context);
         self.space.breadcrumb.clear_children(&mut self.ui_context); self.space.breadcrumb.set_parent(None, &mut self.ui_context);
         if let Some((_, textbox)) = &mut self.open_with_dialog {
             textbox.clear_children(&mut self.ui_context);
             textbox.set_parent(None, &mut self.ui_context);
         }
 
         let has_sidebar = false;
         let sidebar_w = if has_sidebar { self.paginator.sidebar_w() } else { 0.0 };
         // Inset from the WINDOW edge: the root plate's roll plus its padding
         // (the padding alone left most of the run on the roll, so the edge
         // read narrower than the gap between the panes).
         let pad = cce_ui::layout::root_plate_inset();
         let browse_x = if has_sidebar { sidebar_w + pad + 1.0 } else { pad };
         let usable_w = self.width as f32 - sidebar_w - (if has_sidebar { 1.0 } else { 0.0 }) - 2.0 * pad;
         let content_y = pad;
 
         let select_bar_h = SELECT_BAR_H;
         let content_h = if self.select_mode {
             self.height as f32 - 2.0 * pad - select_bar_h
         } else {
             self.height as f32 - 2.0 * pad
         };
 
         {
             let self_ptr = self as *mut Self;
             unsafe {
                 if has_sidebar {
                     self.ui_context.register_widget((*self_ptr).paginator.base().id(), (*self_ptr).paginator.as_ptr_mut());
                     (*self_ptr).paginator.set_parent(None, &mut self.ui_context);
                 }
                 self.ui_context.register_widget((*self_ptr).view_dropdown.base().id(), (*self_ptr).view_dropdown.as_ptr_mut());
                 (*self_ptr).view_dropdown.set_parent(None, &mut self.ui_context);
             }
         }
 
         // SplitBox + pane containers DISSOLVED (Phase 6y): the split is app state; the
         // pages lay out and render the left pane's content from the pane rect (they
         // always did — the container copies just coincided), the preview renders into
         // the right pane below.
         match self.current_page {
             Page::Browse => self.browse_split.set_rect(browse_x, content_y, usable_w, content_h),
             Page::Network => self.network_split.set_rect(browse_x, content_y, usable_w, content_h),
             Page::Space => self.space_split.set_rect(browse_x, content_y, usable_w, content_h),
         }
         // Collapsed preview (plate-dock, cce-ui RFC 7c-2): every page's pane
         // column narrows to the stub's width — re-forced each layout so a
         // window resize keeps the stub fixed while the list takes the rest.
         if self.preview_dock.collapsed {
             for split in [&mut self.browse_split, &mut self.network_split, &mut self.space_split] {
                 let combined = (split.w - split.gap).max(1.0);
                 split.frac = (1.0 - PREVIEW_STUB_W / combined).clamp(0.0, 1.0);
             }
         }
 
         if let Some((_, textbox)) = &mut self.open_with_dialog {
             self.ui_context.register_widget(textbox.base().id(), textbox.as_ptr_mut());
             textbox.set_parent(None, &mut self.ui_context);
         }
 
         // Layout widgets recursively inside the parent space
         let mut dummy_pc = pages::PageContent::new();
         if has_sidebar {
             let page_idx = Page::ALL.iter().position(|&p| p == self.current_page).unwrap_or(0);
             self.paginator.set_selected_page(page_idx);
             cce_ui::layout::render_widget(&mut dummy_pc, &mut self.paginator, 0.0, 0.0, sidebar_w, self.height as f32, &mut self.ui_context);
         }
 
         // Each top-level widget rendered through the same immediate-mode path the root
         // recursion used, replicating the legacy TUPLE ORDER: plain child quads first,
         // then the dissolved root plate container's plate, then the rounded children (the
         // aggregate emitted all plain quads before the rounded root bg).
         let mut window_pc = pages::PageContent::new();
         {
             let self_ptr = self as *mut Self;
             unsafe {
                 let mut plain_pc = pages::PageContent::new();
                 // NOT the view dropdown: every page's `view()` already renders
                 // it, so a copy here was a second draw of the same widget — at
                 // the previous frame's rect, and compositing its label's
                 // antialiased edges twice into a faux-bold.
                 // The dissolved splitter's paint: its divider quad, then the preview
                 // pane (the only pane content the pages don't render themselves). The
                 // left pane's container copy is gone — the legacy aggregate painted it
                 // UNDER the page's own copy, double-compositing every translucent quad.
                 {
                     let split = match self.current_page {
                         Page::Browse => &self.browse_split,
                         Page::Network => &self.network_split,
                         Page::Space => &self.space_split,
                     };
                     // A collapsed preview draws neither divider nor content —
                     // the stub band and its corner control paint in
                     // display_list, over everything (cce-ui RFC 7c-2).
                     if !self.preview_dock.collapsed {
                         if let Some((dx, dy, dw, dh, dc)) = split.divider_quad() {
                             plain_pc.rects.push((dc, dx, dy, dw, dh, 0.0, (true, true, true, true)));
                         }
                         let (px_r, py_r, pw_r, ph_r) = split.right_rect();
                         // The pane clamps its own text bounds to its rect inside
                         // push_prims (the old SplitBox clamp, absorbed).
                         (*self_ptr).preview.set_rect(px_r, py_r, pw_r, ph_r);
                         (*self_ptr).preview.push_prims(&mut plain_pc);
                     }
                 }
                 if let Some((_, textbox)) = &mut (*self_ptr).open_with_dialog {
                     let (x, y, w, h) = textbox.rect();
                     cce_ui::layout::render_widget(&mut plain_pc, textbox, x, y, w, h, &mut self.ui_context);
                 }
 
                 // Legacy aggregate order: plain child quads, then rounded child quads.
                 // The dissolved root plate that used to sit between them is now a
                 // Prim::Plate emitted FIRST in display_list — the lit window slab the
                 // rest of the frame sits on (and the surface the band carves CSG into).
                 let mut plain_pc = plain_pc;
                 let (plain, rounded): (Vec<_>, Vec<_>) =
                     std::mem::take(&mut plain_pc.rects).into_iter().partition(|r| r.5 <= 0.1);
                 window_pc.rects.extend(plain);
                 window_pc.rects.extend(rounded);
                 window_pc.absorb(plain_pc);
 
                 // The view dropdown's flush inset plate is carved below, once
                 // the pages have laid the dropdown out — carving it here would
                 // read the previous frame's rect (`pages::dropdown_relief`).
             }
         }
 
         // 3. Draw Page custom/static content (drawn to pc)
         let mut pc = pages::PageContent::new();
         match self.current_page {
             Page::Browse => {
                 let (bx, by, bw, bh) = self.browse_split.left_rect();
                 let browse_pc = pages::browse::view(&mut self.browse, &mut self.view_dropdown, bx, by, bw, bh, self.select_mode, &mut self.ui_context);
 
                 pc.absorb(browse_pc);
             }
             Page::Network => {
                 let (nx, ny, nw, nh) = self.network_split.left_rect();
                 let network_pc = pages::network::view(&mut self.network, &self.browse, &mut self.view_dropdown, nx, ny, nw, nh, &mut self.ui_context);
 
                 pc.absorb(network_pc);
             }
             Page::Space => {
                 let (sx, sy, sw, sh) = self.space_split.left_rect();
                 let space_pc = pages::space::view(&mut self.space, &self.browse, &mut self.view_dropdown, sx, sy, sw, sh, &mut self.ui_context);
 
                 pc.absorb(space_pc);
             }
         }
 
         // The view dropdown's flush inset plate (control_relief) lives in its
         // modern paint(); the flat view loses it, so carve it here — from the
         // rect the page above just laid the dropdown out at, NOT the one it
         // held when this method started.
         {
             let (dx, dy, dw, dh) = self.view_dropdown.rect();
             pages::dropdown_relief(
                 &mut window_pc,
                 cce_ui::scene::layout::Rect { x: dx, y: dy, width: dw, height: dh },
             );
         }
 
         // Draw bottom selection bar if select_mode is enabled. It lives below the
         // content region, so it goes into window_pc: page content (pc) is clipped
         // to the viewport and would swallow the bar entirely.
         if self.select_mode {
             let bar_y = self.height as f32 - select_bar_h - cce_ui::layout::root_plate_inset();
             // Divider line — under control_relief the bar is a band carved into the
             // plate (see display_list), so the flat line is the fallback only.
             if !cce_ui::layout::control_relief() {
                 window_pc.rect([0.15, 0.20, 0.16, 1.0], browse_x, bar_y, usable_w, 1.0);
             }
 
             let btn_h = cce_ui::layout::button_height();
             let btn_y = bar_y + (select_bar_h - btn_h) / 2.0;
 
             // Cancel and Save/Select: equal widths, one gap, right-aligned to
             // the content region with the bar's own padding — and the
             // toolkit's plain button face, not hand-picked red/green tints.
             let btn_w = 84.0;
             let gap = cce_ui::layout::root_plate_gap();
             // Flush with the panels' right edge — an extra inset here left the
             // buttons hanging short of the column above them.
             let confirm_x = browse_x + usable_w - btn_w;
             let cancel_x = confirm_x - gap - btn_w;
             window_pc.button_plain("Cancel", cancel_x, btn_y, btn_w, btn_h, Message::SelectCancel);
             let button_label = if self.save_mode { "Save" } else { "Select" };
             window_pc.button_plain(button_label, confirm_x, btn_y, btn_w, btn_h, Message::SelectOpen);
         }
 
         // Gather all popovers
         let mut popover_pc = pages::PageContent::new();
         cce_ui::layout::render_popovers(&mut popover_pc, &mut self.ui_context);
 
         // Gather context menu overlay if visible
         let mut context_menu_pc = pages::PageContent::new();
         if self.context_menu.visible {
             let cx = self.context_menu.x;
             let cy = self.context_menu.y;
             let cw = self.context_menu.w;
             let ch = self.context_menu.h;
 
             // The menu is a lit plate of the same material as the surface it
             // opens on: it takes the HOST plate's face rather than a popover
             // color of its own, and floats as frosted glass — the configured
             // translucency plus the blur-behind sentinel (negative alpha), which
             // is the breadcrumb's raised-run treatment. The frost is not
             // decoration at this alpha: it is what keeps the labels readable
             // over live content instead of over a legible-by-luck backdrop.
             //
             // A fully transparent host fill degrades to the edges-only boss,
             // exactly as the raised run does — with no face to tint, a plate
             // would paint a hole.
             let menu_r = cce_ui::layout::plate_corner_radius();
             let face = cce_ui::color::page_low_color();
             if face[3] > 0.001 {
                 let mut frosted = face;
                 frosted[3] = -frosted[3];
                 context_menu_pc.plate(frosted, cx, cy, cw, ch, menu_r);
             } else {
                 context_menu_pc.relief_raised(cx, cy, cw, ch, menu_r);
             }
             // Hover highlight, inset off the roll so it sits on the face rather
             // than climbing the lit edge. The last row is the only one that meets
             // a rounded corner (row 0 is the header and never highlights), so it
             // carries the plate's radius on the bottom two.
             if let Some(h_idx) = self.context_menu.hovered {
                 let iy = cy + h_idx as f32 * ROW_H;
                 let inset = (cce_ui::layout::bevel_width().min(ch * 0.2) * 0.5).max(2.0);
                 let last = h_idx + 1 == self.context_menu.options.len();
                 context_menu_pc.rect_rounded(
                     [0.20, 0.40, 0.65, 0.6],
                     cx + inset,
                     iy + 2.0,
                     cw - 2.0 * inset,
                     ROW_H - 4.0,
                     (menu_r - inset).max(0.0),
                     (false, false, last, last),
                 );
             }
             // Text options, in the DE's menu font — family and size. Drawn
             // with a hardcoded 12.0 and no family, the row menu read in the
             // default sans while the list it opened over wore the configured
             // face.
             let (menu_family, menu_size) = cce_ui::widget::context_menu::label_font();
             for (idx, (opt, _)) in self.context_menu.options.iter().enumerate() {
                 let iy = cy + idx as f32 * ROW_H + (ROW_H - menu_size) / 2.0;
                 // The toolkit's semantic text colors, not the hand-mixed greys
                 // that came with the near-black popover face: the header's old
                 // 0.44 grey was a step above black and all but vanishes on the
                 // plate's own mid-slate.
                 let text_color = if idx == 0 {
                     cce_ui::color::TEXT_DIM
                 } else if self.context_menu.hovered == Some(idx) {
                     cce_ui::color::TEXT_HEADER
                 } else {
                     cce_ui::color::TEXT_FG
                 };
                 // TODO(style): the row label's 8px lead-in is a control-level inset.
                 context_menu_pc.text_with_font(opt, cx + 8.0, iy, menu_size, text_color, &menu_family);
             }
         }
 
         // Gather open-with dialog backdrop & dialog panel if active (open_with_dialog uses textbox rendering manually but we can gather its other quads/texts)
         let mut dialog_pc = pages::PageContent::new();
         if let Some((_path, textbox)) = &mut self.open_with_dialog {
             let r = open_with_rects(self.width as f32, self.height as f32);
             let (dialog_x, dialog_y, dialog_w, dialog_h) = (r.x, r.y, r.w, r.h);
             let (tb_x, tb_y, tb_w, tb_h) = r.tb;
             let (btn_cancel_x, btn_cancel_y, btn_cancel_w, btn_cancel_h) = r.cancel;
             let (btn_open_x, btn_open_y, btn_open_w, btn_open_h) = r.open;
 
             // Semi-transparent backdrop overlay
             dialog_pc.rect([0.02, 0.02, 0.03, 0.6], 0.0, 0.0, self.width as f32, self.height as f32);
             // Dialog panel border
             dialog_pc.rect([0.22, 0.22, 0.28, 1.0], dialog_x, dialog_y, dialog_w, dialog_h);
             // Dialog panel background
             dialog_pc.rect([0.08, 0.08, 0.12, 1.0], dialog_x + 1.0, dialog_y + 1.0, dialog_w - 2.0, dialog_h - 2.0);
 
             // Title and prompt, inset from the plate rim by the pane rung
             // (the same inset the well and buttons take in open_with_rects).
             let dialog_pad = cce_ui::layout::plate_padding();
             dialog_pc.text("Open with...", dialog_x + dialog_pad, dialog_y + dialog_pad, 14.0, [1.0, 1.0, 1.0, 1.0]);
             // TODO(style): the prompt's 42px drop is the dialog's text rhythm.
             dialog_pc.text("Enter command:", dialog_x + dialog_pad, dialog_y + 42.0, 11.0, [0.54, 0.54, 0.58, 1.0]);
 
             // Set textbox position dynamically using configured textbox height
             textbox.set_rect(tb_x, tb_y, tb_w, tb_h);
             // Raised dialog plate + recessed command well (control_relief styling).
             dialog_pc.relief_raised(dialog_x, dialog_y, dialog_w, dialog_h, 0.0);
             dialog_pc.relief_recessed(tb_x, tb_y, tb_w, tb_h, cce_ui::layout::textbox_corner_radius());
 
             // Plain toolkit faces, like the chooser footer: the themed Button
             // owns its own hover state, so the hand-rolled cursor tracking and
             // the red/green tints go together.
             dialog_pc.button_plain("Cancel", btn_cancel_x, btn_cancel_y, btn_cancel_w, btn_cancel_h, Message::OpenWithCancel);
             dialog_pc.button_plain("Open", btn_open_x, btn_open_y, btn_open_w, btn_open_h, Message::OpenWithSubmit);
         }
 
         // Translate everything into widgets and text_items!
         // We collect from: window_pc, pc, popover_pc, context_menu_pc, dialog_pc
         let mut page_buttons = Vec::new();
 
         for (part_idx, pc_part) in [&window_pc, &pc, &popover_pc, &context_menu_pc, &dialog_pc].into_iter().enumerate() {
             let is_page_content = part_idx == 1;
 
             // Plates first: a plate owns a FACE, so it is the floor of its part —
             // everything else the part emits (a hover fill, an engraved seam, the
             // labels) is meant to land on top of it. Emitted after the rects it
             // would paint straight over them, which is where the context menu's
             // hover row went the first time this ran.
             for (c, px, py, pw, ph, pr, pd) in &pc_part.plates {
                 let (mut wy, mut wh) = (*py, *ph);
                 if is_page_content {
                     match clip_to_viewport(wy, wh, content_y, content_y + content_h) {
                         Some((cy, ch)) => { wy = cy; wh = ch; }
                         None => continue,
                     }
                 }
                 widgets.push(AppWidget {
                     x: *px,
                     y: wy,
                     w: *pw,
                     h: wh,
                     color: *c,
                     radius: *pr,
                     corners: (true, true, true, true),
                     fx: WidgetFx::Plate(*pd),
                 });
             }
 
             for (c, x, y, w, h, r, corners) in &pc_part.rects {
                 let wx = *x;
                 let mut wy = *y;
                 let ww = *w;
                 let mut wh = *h;
 
                 if is_page_content {
                     match clip_to_viewport(wy, wh, content_y, content_y + content_h) {
                         Some((cy, ch)) => { wy = cy; wh = ch; }
                         None => continue,
                     }
                 }
 
                 widgets.push(AppWidget {
                     x: wx,
                     y: wy,
                     w: ww,
                     h: wh,
                     color: *c,
                     radius: *r,
                     corners: *corners,
                     fx: WidgetFx::Flat,
                 });
             }
             for (id, ix, iy, iw, ih, alpha) in &pc_part.images {
                 let (mut wy, mut wh) = (*iy, *ih);
                 if is_page_content {
                     match clip_to_viewport(wy, wh, content_y, content_y + content_h) {
                         Some((cy, ch)) => { wy = cy; wh = ch; }
                         None => continue,
                     }
                 }
                 widgets.push(AppWidget {
                     x: *ix,
                     y: wy,
                     w: *iw,
                     h: wh,
                     color: [0.0; 4],
                     radius: 0.0,
                     corners: (true, true, true, true),
                     fx: WidgetFx::Image { id: *id, alpha: *alpha },
                 });
             }
             for (rx, ry, rw, rh, rr, rd, kind) in &pc_part.reliefs {
                 let (mut wy, mut wh) = (*ry, *rh);
                 if is_page_content {
                     match clip_to_viewport(wy, wh, content_y, content_y + content_h) {
                         Some((cy, ch)) => { wy = cy; wh = ch; }
                         None => continue,
                     }
                 }
                 widgets.push(AppWidget {
                     x: *rx,
                     y: wy,
                     w: *rw,
                     h: wh,
                     color: [0.0; 4],
                     radius: *rr,
                     corners: (true, true, true, true),
                     fx: match *kind {
                         pages::RELIEF_RAISED => WidgetFx::Boss(*rd),
                         pages::RELIEF_INSET => WidgetFx::Inset(*rd),
                         pages::RELIEF_INSET_FOCUS => WidgetFx::InsetFocus(*rd),
                         pages::RELIEF_RECESSED_FOCUS => WidgetFx::RecessFocus(*rd),
                         _ => WidgetFx::Recess(*rd),
                     },
                 });
             }
             for (ax, ay, bx, by, gw, gd, hx, hy, hw, hh) in &pc_part.grooves {
                 // Clipped by the HOST rect, not the seam's own span: a groove
                 // whose host is scrolled out has nothing left to engrave.
                 let (mut wy, mut wh) = (*hy, *hh);
                 if is_page_content {
                     match clip_to_viewport(wy, wh, content_y, content_y + content_h) {
                         Some((cy, ch)) => { wy = cy; wh = ch; }
                         None => continue,
                     }
                 }
                 widgets.push(AppWidget {
                     x: *hx,
                     y: wy,
                     w: *hw,
                     h: wh,
                     color: [0.0; 4],
                     radius: 0.0,
                     corners: (true, true, true, true),
                     fx: WidgetFx::Groove { ax: *ax, ay: *ay, bx: *bx, by: *by, width: *gw, depth: *gd },
                 });
             }
             for (btn, action) in &pc_part.buttons {
                 let base = btn.base();
                 let bg = btn.bg.unwrap_or([0.16, 0.16, 0.24, 1.0]);
                 let hover_bg = btn.hover_bg.unwrap_or([0.25, 0.30, 0.26, 1.0]);
                 let label = base.label.as_deref().unwrap_or("");
                 // The label's font is the configured button font, resolved the
                 // same way `Button::paint` resolves it — family AND size. A
                 // hardcoded 12.0 here rendered every plain button's label a
                 // size or two off whatever the rest of the DE's buttons wear.
                 let (label_family, label_size) = {
                     let (family, size) = cce_ui::layout::parse_font_string(&cce_ui::layout::button_font());
                     (family, size.unwrap_or(12.0))
                 };
                 let label_color = btn.label_color.unwrap_or([0.83, 0.83, 0.83, 1.0]);
 
                 let wx = base.x;
                 let mut wy = base.y;
                 let ww = base.w;
                 let mut wh = base.h;
 
                 if is_page_content {
                     match clip_to_viewport(wy, wh, content_y, content_y + content_h) {
                         Some((cy, ch)) => { wy = cy; wh = ch; }
                         None => continue,
                     }
                 }
 
                 let hovering = self.cursor_x >= wx && self.cursor_x <= wx + ww
                     && self.cursor_y >= wy && self.cursor_y <= wy + wh;
                 let col = if hovering { hover_bg } else { bg };
 
                 // Flush inset button (control_relief): groove ring down,
                 // beveled lip back up, face level with the surface —
                 // mirroring Button::paint's relief branch.
                 let fx = if cce_ui::layout::control_relief() {
                     WidgetFx::Inset(cce_ui::layout::bevel_width().min(wh * 0.2))
                 } else {
                     WidgetFx::Flat
                 };
                 widgets.push(AppWidget {
                     x: wx,
                     y: wy,
                     w: ww,
                     h: wh,
                     color: col,
                     radius: 4.0, // standard button radius
                     corners: (true, true, true, true),
                     fx,
                 });
 
                 // Centring needs the SHAPED width, not `chars * size * 0.65`:
                 // that estimate runs wide on a proportional face (and narrow on
                 // a large mono one), so a centred label sat visibly off to one
                 // side of its own plate — the chooser's Cancel/Select were ~6px
                 // left of centre. Measure the run, as `Button::label_width`
                 // does, and let `align_text_y` place it vertically, the
                 // toolkit's convention for every other text-bearing control.
                 let text_w = cce_ui::widget::display::measure_text_width(label, &label_family, label_size);
                 let text_x = if btn.justify == cce_ui::widget::Justification::Left {
                     // TODO(style): a left-justified button label's lead-in is a
                     // control-level inset (Button's own, not a rung).
                     base.x + 8.0
                 } else {
                     base.x + (base.w - text_w) / 2.0
                 };
                 let text_y = cce_ui::layout::align_text_y(base.y, base.h, label_size, 0.0);
 
                 let start_bounds = if is_page_content {
                     [0.0, content_y, self.width as f32, content_y + content_h]
                 } else {
                     [0.0, 0.0, self.width as f32, self.height as f32]
                 };
                 let text_h = label_size * 1.4;
                 let occluded = if part_idx < 2 {
                     occlude_against(
                         start_bounds,
                         text_x,
                         text_x + text_w,
                         text_y,
                         text_y + text_h,
                         &[&popover_pc, &context_menu_pc, &dialog_pc],
                     )
                 } else {
                     Some(start_bounds)
                 };
                 let final_button_bounds = match occluded {
                     Some(b) => Some(b),
                     None => {
                         page_buttons.push((btn.clone(), action.clone()));
                         continue;
                     }
                 };
 
                 // The family goes with it: measuring in one face and rendering
                 // in another is how the centring drifted in the first place.
                 texts.push((label.to_string(), label_size, text_x, text_y, label_color, Some(label_family), final_button_bounds));
 
                 page_buttons.push((btn.clone(), action.clone()));
             }
             for (text, size, x, y, col, font, bounds) in &pc_part.texts {
                 let clamped_bounds = if is_page_content {
                     let viewport_top = content_y;
                     let viewport_bottom = content_y + content_h;
                     match bounds {
                         Some(b) => Some([
                             b[0],
                             b[1].max(viewport_top),
                             b[2],
                             b[3].min(viewport_bottom),
                         ]),
                         None => Some([
                             0.0,
                             viewport_top,
                             self.width as f32,
                             viewport_bottom,
                         ]),
                     }
                 } else {
                     *bounds
                 };
 
                 let start_bounds = clamped_bounds.unwrap_or([0.0, 0.0, self.width as f32, self.height as f32]);
                 let text_w = text.chars().count() as f32 * size * 0.65;
                 let text_h = *size * 1.4;
                 let occluded = if part_idx < 2 {
                     occlude_against(
                         start_bounds,
                         *x,
                         *x + text_w,
                         *y,
                         *y + text_h,
                         &[&popover_pc, &context_menu_pc, &dialog_pc],
                     )
                 } else {
                     Some(start_bounds)
                 };
                 let final_bounds = match occluded {
                     Some(b) => Some(b),
                     None => continue,
                 };
 
                 texts.push((text.clone(), *size, *x, *y, *col, font.clone(), final_bounds));
             }
         }
 
         self.widgets = widgets;
         self.texts = texts;
         self.page_buttons = page_buttons;
         self.ui_context.clear_dirty();
         self.needs_rebuild = false;
     }
 }
 
 // ── Application Trait Implementation ────────────────────────────────
 
 impl Application for FilesystemApp {
     type Message = Message;
 
     fn ui_context(&self) -> Option<&cce_ui::context::UiContext> {
         Some(&self.ui_context)
     }
 
     // The engine ticks the exposed context each loop — this is what drives the
     // dropdown expand/contract animation frames.
     fn ui_context_mut(&mut self) -> Option<&mut cce_ui::context::UiContext> {
         Some(&mut self.ui_context)
     }
 
     fn is_movable_root_plate_at(&self, px: f32, py: f32) -> bool {
         // 1. If dialog is open, do not drag
         if self.open_with_dialog.is_some() {
             return false;
         }
         // 2. If context menu is visible, do not drag
         if self.context_menu.visible {
             return false;
         }
         // 3. If in the sidebar area (when sidebar is active), do not drag
         if false {
             let sidebar_w = self.paginator.sidebar_w();
             if px <= sidebar_w {
                 return false;
             }
         }
         // 4. If over any page button, do not drag
         for (btn, _) in &self.page_buttons {
             let base = btn.base();
             if px >= base.x && px <= base.x + base.w && py >= base.y && py <= base.y + base.h {
                 return false;
             }
         }
         if self.current_page == Page::Browse {
             if self.browse_split.dragging || self.browse_split.hovered {
                 return false;
             }
             // The dissolved List blocked window drags via its registered ScrollBox
             // (blocks_root_plate_drag); veto app-side now or every row press starts a
             // compositor window move and the app never sees it.
             let l = &self.browse.list;
             if px >= l.x && px <= l.x + l.w && py >= l.y && py <= l.y + l.h {
                 return false;
             }
         } else if self.current_page == Page::Network {
             if self.network_split.dragging || self.network_split.hovered {
                 return false;
             }
         } else if self.current_page == Page::Space {
             if self.space_split.dragging || self.space_split.hovered {
                 return false;
             }
             // Same reasoning as the List above: without this veto every press
             // on a tile starts a compositor window move and the app never sees
             // the click.
             let (mx, my, mw, mh) = self.space.map_rect;
             if px >= mx && px <= mx + mw && py >= my && py <= my + mh {
                 return false;
             }
         }
         // 5. root plate container dissolved: the surface itself is the movable plate; drag
         // anywhere a drag-blocking widget isn't.
         self.ui_context.drag_allowed_at(px, py)
     }
 
     fn new(_qh: &QueueHandle<cce_ui::engine::EngineState<Self>>, sender: calloop::channel::Sender<Self::Message>) -> Self {
         // Parse command line arguments
         let args: Vec<String> = std::env::args().collect();
         let select_directory = args.iter().any(|arg| arg == "--select-dir");
         let save_mode = args.iter().any(|arg| arg == "--save");
         let select_mode = save_mode || args.iter().any(|arg| arg == "--select" || arg == "--select-dir");
 
         // A positional path opens there instead of the remembered directory.
         // This is what `Exec=cce-files %f` passes as the inode/directory
         // handler; without it the desktop entry could claim the type but
         // always land on the last-visited dir, ignoring the folder clicked.
         // Flags are skipped rather than just args[1], so `--select /tmp`
         // works. A path that does not resolve falls through to the last dir,
         // and a file opens its containing directory.
         let start_dir = args
             .iter()
             .skip(1)
             .find(|a| !a.starts_with("--"))
             .and_then(|a| std::fs::canonicalize(a).ok())
             .and_then(|p| if p.is_dir() { Some(p) } else { p.parent().map(|q| q.to_path_buf()) });
 
         cce_ui::scale::set_scale_factor(1.0);
 
         let browse = pages::browse::BrowseState::default();
         let _current_dir = browse.current_dir.clone();
 
         let pages_names = Page::ALL.iter().map(|p| p.label().to_string()).collect::<Vec<_>>();
         let paginator = cce_ui::widget::Paginator::new(pages_names);
         // These name the visualization rather than the page, so they are not
         // Page::label(). Order MUST track Page::ALL — the selected index is
         // indexed straight into it when the dropdown changes.
         let view_dropdown = cce_ui::widget::Dropdown::new(
             vec!["List".to_string(), "Graph".to_string(), "Space".to_string()],
             0,
         ).with_font_family(&cce_ui::layout::list_font_parsed().0);
 
         let fs_service = services::fs::FsService::new(sender.clone());
         let initial_w = if select_mode { 900 } else { 1200 };
         let initial_h = if select_mode { 500 } else { 720 };
         let app = Self {
             current_page: Page::Browse,
             browse,
             network: pages::network::NetworkState::default(),
             space: pages::space::SpaceState::default(),
             preview: Default::default(),
             focused_well: FocusedWell::Content,
             preview_dock: Default::default(),
             preview_prior_fracs: None,
             plate_menu_actions: Vec::new(),
             select_mode,
             select_directory,
             save_mode,
             widgets: Vec::new(),
             texts: Vec::new(),
             font_system: cce_ui::create_font_system(),
             needs_rebuild: true,
             width: initial_w,
             height: initial_h,
             scale_factor: 1.0,
             page_buttons: Vec::new(),
             hovered_button: None,
             cursor_x: 0.0,
             cursor_y: 0.0,
             paginator,
             view_dropdown,
             just_initialized: true,
             ui_context: cce_ui::context::UiContext::new(),
             watcher: None,
             fs_service,
             seen_renderer: false,
             context_menu: ContextMenu {
                 visible: false,
                 x: 0.0,
                 y: 0.0,
                 w: 120.0,
                 h: 0.0,
                 options: Vec::new(),
                 hovered: None,
             },
             open_with_dialog: None,
             browse_split: SplitPane::new(0.49, 100.0, 100.0, cce_ui::layout::root_plate_gap()),
             network_split: SplitPane::new(0.49, 100.0, 100.0, cce_ui::layout::root_plate_gap()),
             space_split: SplitPane::new(0.49, 100.0, 100.0, cce_ui::layout::root_plate_gap()),
             last_space_click_time: std::time::Instant::now(),
             last_space_path: None,
             last_click_time: std::time::Instant::now(),
             last_clicked_idx: None,
             keys: BrowseKeys::load(),
         };
 
         
         // Start initial directory loading via FsService. ReadDirectory lands in
         // the same DirectoryLoaded handler ReadLastDir eventually reaches, so an
         // argv path just skips the restore step; current_dir and the breadcrumb
         // are set when the load completes either way.
         match start_dir {
             Some(dir) => app.fs_service.send(services::fs::FsRequest::ReadDirectory(dir)),
             None => app.fs_service.send(services::fs::FsRequest::ReadLastDir),
         }
 
         // NOTE: do not call rebuild_layout() here. This value is moved out of new()
         // into the engine, which changes its address; the container/splitter widgets
         // capture raw self-pointers during rebuild, so the first rebuild must happen
         // after the move (the engine triggers it on the first frame via needs_rebuild).
         app
     }
 
     fn settings(&self) -> WindowSettings {
         if self.select_mode {
             let title = if self.save_mode {
                 "Save File"
             } else if self.select_directory {
                 "Select Directory"
             } else {
                 "Select File"
             };
             WindowSettings {
                 title: title.to_string(),
                 // The cce- prefix matters: the compositor's is_cce_app gate keys
                 // blur and the root plate corner radius off it.
                 app_id: "cce-filesystem-chooser".to_string(),
                 width: 900,
                 height: 500,
                 fullscreen: false,
                 min_size: Some((800, 400)),
             }
         } else {
             WindowSettings {
                 title: "Files".to_string(),
                 app_id: "cce-files".to_string(),
                 width: 1200,
                 height: 720,
                 fullscreen: false,
                 min_size: Some((1020, 600)),
             }
         }
     }
 
     fn update(&mut self, msg: Self::Message, needs_rebuild: &mut bool, _exit: &mut bool) {
         match msg {
             Message::SwitchPage(page) => {
                 self.current_page = page;
                 let page_idx = Page::ALL.iter().position(|&p| p == page).unwrap_or(0);
                 self.paginator.set_selected_page(page_idx);
                 self.view_dropdown.selected = page_idx;
                 // Switching to Space is what triggers the first scan — it is
                 // far too expensive to run for a page nobody is looking at.
                 self.ensure_space_scan();
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
             Message::Browse(msg) => {
                 let mut is_file_double_click = false;
                 if let pages::browse::BrowseMessage::NavigateTo(idx) = &msg {
                     let now = std::time::Instant::now();
                     if self.last_clicked_idx == Some(*idx) && now.duration_since(self.last_click_time).as_millis() < 500 {
                         is_file_double_click = self.browse.entries.get(*idx).map(|e| !e.is_dir || (self.select_mode && !self.select_directory && is_project_dir(&e.path))).unwrap_or(false);
                     }
                     self.last_click_time = now;
                     self.last_clicked_idx = Some(*idx);
                 } else if let pages::browse::BrowseMessage::SelectEntry(idx) = &msg {
                     let now = std::time::Instant::now();
                     self.last_click_time = now;
                     self.last_clicked_idx = Some(*idx);
                 }
 
                 let is_directory_loaded = match &msg {
                     pages::browse::BrowseMessage::DirectoryLoaded(path, _) => Some(path.clone()),
                     _ => None,
                 };
 
                 if let Some(req) = pages::browse::update(&mut self.browse, msg) {
                     self.fs_service.send(req);
                 }
 
                 if let Some(path) = is_directory_loaded {
                     self.start_watching(path);
                     // Navigating re-scans the new subtree when Space is up.
                     self.ensure_space_scan();
                 }
 
                 // If NavigateTo or SelectEntry happened, update Preview path
                 let selected_path = self.browse.selected_path();
                 if let Some(path) = selected_path {
                     self.fs_service.send(services::fs::FsRequest::ReadPreview(path));
                 } else {
                     pages::preview::update(&mut self.preview, pages::preview::PreviewMessage::Clear);
                 }
 
                 if let Some(idx) = self.browse.selected {
                     if let Some(entry) = self.browse.entries.get(idx) {
                         if self.select_mode {
                             self.browse.save_name_box.text = entry.name.clone();
                             if self.browse.save_name_box.editing {
                                 self.browse.save_name_box.edit_buffer = entry.name.clone();
                             }
                         }
                     }
                 } else {
                     if self.select_mode {
                         self.browse.save_name_box.text.clear();
                         if self.browse.save_name_box.editing {
                             self.browse.save_name_box.edit_buffer.clear();
                         }
                     }
                 }
 
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
 
                 if is_file_double_click {
                     self.update(Message::SelectOpen, needs_rebuild, _exit);
                 }
             }
             Message::Preview(msg) => {
                 pages::preview::update(&mut self.preview, msg);
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
             Message::Space(msg) => {
                 pages::space::update(&mut self.space, msg);
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
             Message::SelectOpen => {
                 if self.select_directory {
                     let selected_path = self.browse.selected_path();
                     let path = selected_path.filter(|p| p.is_dir()).unwrap_or_else(|| self.browse.current_dir.clone());
                     println!("{}", path.display());
                     std::process::exit(0);
                 } else {
                     let filename = if self.browse.save_name_box.editing {
                         self.browse.save_name_box.edit_buffer.trim()
                     } else {
                         self.browse.save_name_box.text.trim()
                     };
                     if !filename.is_empty() {
                         let path = self.browse.current_dir.join(filename);
                         if path.is_dir() && !is_project_dir(&path) {
                             self.fs_service.send(services::fs::FsRequest::ReadDirectory(path));
                         } else {
                             if self.select_mode {
                                 println!("{}", path.display());
                                 std::process::exit(0);
                             } else {
                                 crate::services::fs::open_file(&path);
                             }
                         }
                     } else {
                         let selected_path = self.browse.selected_path();
                         if let Some(path) = selected_path {
                             if path.is_dir() && !is_project_dir(&path) {
                                 self.fs_service.send(services::fs::FsRequest::ReadDirectory(path));
                             } else {
                                 if self.select_mode {
                                     println!("{}", path.display());
                                     std::process::exit(0);
                                 } else {
                                     crate::services::fs::open_file(&path);
                                 }
                             }
                         }
                     }
 
                 }
             }
             Message::SelectCancel => {
                 std::process::exit(1);
             }
             Message::PromptOpenWith(path) => {
                 let default_cmd = if let Some(mime) = crate::services::fs::get_mime_type(&path) {
                     if let Some((_, cmd)) = crate::services::fs::get_default_application(&mime) {
                         cmd
                     } else {
                         String::new()
                     }
                 } else {
                     String::new()
                 };
                 let mut tb = cce_ui::widget::TextBox::new(default_cmd)
                     .with_max_width(None)
                     .with_placeholder("Program/Command");
                 tb.focus();
                 self.ui_context.set_focused(&mut tb);
                 self.open_with_dialog = Some((path, tb));
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
             Message::OpenWithSubmit => {
                 if let Some((path, textbox)) = self.open_with_dialog.take() {
                     let cmd_str = if textbox.editing {
                         textbox.edit_buffer.trim().to_string()
                     } else {
                         textbox.text.trim().to_string()
                     };
                     if !cmd_str.is_empty() {
                         crate::services::fs::spawn_command_for_path(&cmd_str, &path);
                     }
                 }
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
             Message::OpenWithCancel => {
                 self.open_with_dialog = None;
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
             Message::CopyPath(path) => {
                 cce_ui::widget::clipboard::copy_to_clipboard(&path);
             }
         }
     }
 
     fn tick(&mut self, dt: f32, needs_rebuild: &mut bool) {
         // Pump the widget tick walk (the cce-data-editor pattern): animating
         // widgets — the view dropdown's expand/contract menu — register as
         // tick receivers and report changed until their transition lands;
         // without this the close animation freezes at fully open.
         if self.ui_context.tick(dt) {
             *needs_rebuild = true;
             self.needs_rebuild = true;
         }
 
         if self.just_initialized {
             self.just_initialized = false;
             if self.save_mode {
                 self.browse.save_name_box.focus();
                 self.ui_context.set_focused(&mut self.browse.save_name_box);
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
         }
 
         if self.paginator.tick(dt, &mut self.ui_context) {
             *needs_rebuild = true;
             self.needs_rebuild = true;
         }
 
         // The app-owned scrollers' wheel glide / flick coast: the wheel only
         // moves their target, these ticks carry the drawn offsets there, so
         // frames must keep coming while either is live.
         if self.browse.list.tick(dt) {
             // Rows slid under a still pointer: re-derive the hover.
             self.browse.list.cursor_moved(self.cursor_x, self.cursor_y);
             *needs_rebuild = true;
             self.needs_rebuild = true;
         }
         if self.preview.tick(dt) {
             *needs_rebuild = true;
             self.needs_rebuild = true;
         }
     }
 
     /// Re-request the shown file's preview when the renderer is replaced.
     ///
     /// `PreviewPane` holds a **renderer** image id, and a renderer does not
     /// outlive its session: `cce-ui`'s `window_runner` repairs a lost Wayland
     /// transport by opening a new session around the same `Application`, which
     /// rebuilds the renderer and with it the image table. The cached id then
     /// names an image that no longer exists, and a draw for an unknown id is
     /// skipped rather than reported — so a reconnected window kept the file's
     /// name, size and permissions and showed an empty well where the picture
     /// was, until the user selected a different file.
     ///
     /// The pixels are not kept here (they are moved into the upload), so the
     /// repair is the same round trip the selection makes: drop the dead
     /// texture, ask `FsService` for the preview again, and let
     /// `PreviewMessage::PreviewLoaded` upload it into the live renderer.
     ///
     /// Not on the first renderer: nothing has been uploaded yet, and the
     /// initial directory load is already in flight.
     fn renderer_init(&mut self, _renderer: &mut cce_ui::vk::VkRenderer) {
         if !std::mem::replace(&mut self.seen_renderer, true) {
             return;
         }
         let had_texture = self.preview.drop_texture();
         if let Some(path) = self.preview.path.clone() {
             if had_texture {
                 log::info!(
                     "[preview] renderer replaced; re-reading the preview of {}",
                     path.display()
                 );
                 self.fs_service.send(services::fs::FsRequest::ReadPreview(path));
             }
         }
         self.needs_rebuild = true;
     }
 
     fn display_list(&mut self, size: LogicalSize, scale: f64) -> Option<cce_ui::scene::paint::DisplayList> {
         // Phase 6 single paint path: the whole frame — geometry and text — is this one list.
         // rebuild_layout flattens every source (browse/network page, popovers, context menu,
         // dialogs) into self.widgets/self.texts, with popover/dialog occlusion already folded
         // into each text's bounds.
         if self.needs_rebuild || self.width != size.width as u32 || self.height != size.height as u32 || self.scale_factor != scale {
             self.width = size.width as u32;
             self.height = size.height as u32;
             self.scale_factor = scale;
             cce_ui::scale::set_scale_factor(scale as f32);
             self.rebuild_layout();
         }
         use cce_ui::scene::layout::Rect;
         let mut pc = cce_ui::scene::paint::PaintCtx::new();
         let (fw, fh) = (self.width as f32, self.height as f32);
 
         // The standard root plate (cce-ui `PlateSpec::window`): the DE root
         // material at its opacity, the shared silhouette arc, the DE roll.
         pc.root_plate(fw, fh);
 
         // Band carves, emitted right after the plate: in chooser mode the action
         // bar is a band carved into the bottom. These do NOT CSG-group into the
         // plate's draw, despite sitting immediately behind it — a band flush with
         // the plate's edge suppresses three of its four walls, and an
         // edge-suppressed carve is never eligible (its extended walls would smear
         // across the whole host). The standalone overlay path shades it, which is
         // correct here. `CCE_PLATE_DEBUG=1` names the rule.
         // (The header strip's menubar-style band was removed — the top of the
         // plate is flush; the breadcrumb row sits directly on the surface.)
         if cce_ui::layout::control_relief() {
             let wall = cce_ui::layout::bar_wall_width();
             if self.select_mode {
                 let band_h = SELECT_BAR_H + cce_ui::layout::root_plate_inset();
                 pc.recess_edges(
                     Rect { x: 0.0, y: fh - band_h, width: fw, height: band_h },
                     (0.0, 0.0, 0.0, 0.0),
                     wall,
                     (true, false, false, false),
                 );
             }
         }
 
         for w in &self.widgets {
             let rect = Rect { x: w.x, y: w.y, width: w.w, height: w.h };
             let radii = (w.radius, w.radius, w.radius, w.radius);
             match w.fx {
                 WidgetFx::Bevel(depth) => pc.bevel(rect, radii, &cce_ui::scene::Material::from_fill(w.color), depth),
                 WidgetFx::Plate(depth) => pc.plate(rect, radii, &cce_ui::scene::Material::from_fill(w.color), depth),
                 WidgetFx::Boss(depth) => pc.boss(rect, radii, depth),
                 WidgetFx::Recess(depth) => pc.recess(rect, radii, depth),
                 WidgetFx::RecessFocus(depth) => {
                     let hc = cce_ui::color::highlight_primary_color();
                     pc.recess_tinted(rect, radii, depth, [hc[0], hc[1], hc[2]]);
                 }
                 WidgetFx::Inset(depth) => pc.inset_plate(rect, radii, cce_ui::scene::Material::face(w.color).as_ref(), depth),
                 WidgetFx::InsetFocus(depth) => {
                     pc.inset_plate_tinted(rect, radii, cce_ui::scene::Material::face(w.color).as_ref(), depth, cce_ui::widget::ControlPlate::focus_tint())
                 }
                 WidgetFx::Image { id, alpha } => pc.image(id, rect, alpha),
                 WidgetFx::Groove { ax, ay, bx, by, width, depth } => {
                     pc.groove((ax, ay), (bx, by), width, depth, rect)
                 }
                 WidgetFx::Flat => {
                     if w.radius > 0.1 {
                         pc.rounded_rect(rect, w.radius, w.corners, w.color);
                     } else {
                         pc.quad(rect, w.color);
                     }
                 }
             }
         }
         for (text, font_size, x, y, col, font, bounds) in &self.texts {
             pc.text_with(
                 text.clone(),
                 *x,
                 *y,
                 *font_size,
                 [
                     (col[0] * 255.0) as u8,
                     (col[1] * 255.0) as u8,
                     (col[2] * 255.0) as u8,
                 ],
                 font.clone(),
                 *bounds,
             );
         }
         // The toolkit's shared context menu (breadcrumb segments, config-bound
         // controls) draws into the app's display list like every popover. Its
         // labels carry bounds equal to the menu rect — the engine's popover
         // occlusion clamp exempts exactly that, so they render inside the menu
         // The preview pane's plate-dock affordance (cce-ui RFC 7c-2): the
         // title stub while collapsed, and the corner control — drawn over
         // the page content, under the context menu.
         {
             use cce_ui::widget::plate_dock as dock;
             let band = self.preview_dock_band();
             let stubbed = self.preview_dock.stubbed();
             if stubbed {
                 let r = cce_ui::layout::plate_corner_radius();
                 pc.plate(
                     Rect { x: band.0, y: band.1, width: band.2, height: band.3 },
                     (r, r, r, r),
                     &cce_ui::scene::Material::from_fill(cce_ui::color::page_low_color()),
                     cce_ui::layout::bevel_width().min(band.3 * 0.2),
                 );
                 pc.text_with(
                     "Preview".to_string(),
                     band.0 + cce_ui::layout::plate_padding(),
                     band.1 + (band.3 - 13.0) / 2.0,
                     13.0,
                     [0xc8, 0xc8, 0xd4],
                     None,
                     Some([band.0, band.1, band.0 + band.2 - dock::CORNER_INSET - dock::CORNER_R, band.1 + band.3]),
                 );
             }
             if let Some(c) = dock::corner_center(band, stubbed) {
                 let emphasized = dock::corner_hit(c, self.cursor_x, self.cursor_y)
                     || !self.plate_menu_actions.is_empty();
                 dock::draw_corner_dot(&mut pc, c, emphasized);
             }
         }
 
         // while page text beneath stays clamped.
         // The shared menu paints itself as a lit plate (cce-ui), so the
         // breadcrumb's copy-path menu is the same frosted glass as the row
         // menu above rather than the flat quads it used to stack. Labels come
         // with it: `paint_with_labels` carries the menu font's family, which
         // the hand-rolled `paint` + `text_labels()` loop here did not.
         cce_ui::widget::context_menu::paint_with_labels(&mut pc);
         Some(pc.finish())
     }
 
     fn display_list_text(&self) -> bool {
         true
     }
 
     fn clear_color(&self) -> [f32; 4] {
         [0.0, 0.0, 0.0, 0.0]
     }
 
     fn handle_pointer_move(&mut self, pos: LogicalPosition, needs_rebuild: &mut bool) {
         self.cursor_x = pos.x;
         self.cursor_y = pos.y;
 
         let mut changed = false;
 
         // Routed dispatch (6bd shrink): one Event through the router per targeted root.
         let mv = cce_ui::widget::Event::PointerMove { x: pos.x, y: pos.y, local_x: pos.x, local_y: pos.y };
         if self.open_with_dialog.is_some() {
             if let Some((_path, textbox)) = &mut self.open_with_dialog {
                 let root = textbox.id();
                 let _ = self.ui_context.propagate_event(&mv, root);
             }
             *needs_rebuild = true;
             self.needs_rebuild = true;
             return;
         }
 
         // The toolkit's shared context menu gets the pointer exclusively while open.
         if cce_ui::widget::context_menu::is_visible() {
             if cce_ui::widget::context_menu::cursor_moved(pos.x, pos.y) {
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
             return;
         }
 
         if self.context_menu.visible {
             let cx = self.context_menu.x;
             let cy = self.context_menu.y;
             let cw = self.context_menu.w;
             let ch = self.context_menu.h;
             let was_hovered = self.context_menu.hovered;
             self.context_menu.hovered = None;
             if pos.x >= cx && pos.x <= cx + cw && pos.y >= cy && pos.y <= cy + ch {
                 let idx = ((pos.y - cy) / ROW_H) as usize;
                 if idx < self.context_menu.options.len() && idx > 0 {
                     self.context_menu.hovered = Some(idx);
                 }
             }
             if self.context_menu.hovered != was_hovered {
                 changed = true;
             }
             if changed {
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
             return;
         }
 
         if self.current_page == Page::Browse {
             if self.browse_split.cursor_moved(pos.x, pos.y) {
                 changed = true;
             }
         } else if self.current_page == Page::Network {
             if self.network_split.cursor_moved(pos.x, pos.y) {
                 changed = true;
             }
         } else if self.current_page == Page::Space {
             if self.space_split.cursor_moved(pos.x, pos.y) {
                 changed = true;
             }
         }
 
         if !self.select_mode {
             // Self-routing composite: handle_event, not propagate — the router's
             // children-first descent would let the embedded strip consume this.
             if self.paginator.handle_event(&mv, &mut self.ui_context) {
                 changed = true;
             }
         }
 
         {
             let root = self.view_dropdown.id();
             if self.ui_context.propagate_event(&mv, root) {
                 changed = true;
             }
         }
 
         if self.current_page == Page::Browse {
             if self.select_mode {
                 let root = self.browse.save_name_box.id();
                 if self.ui_context.propagate_event(&mv, root) {
                     changed = true;
                 }
             }
             if self.browse.list.cursor_moved(pos.x, pos.y) {
                 changed = true;
             }
             if self.browse.search_visible {
                 let root = self.browse.search_box.id();
                 if self.ui_context.propagate_event(&mv, root) {
                     changed = true;
                 }
             }
             {
                 let root = self.browse.breadcrumb.id();
                 if self.ui_context.propagate_event(&mv, root) {
                     changed = true;
                 }
             }
         } else if self.current_page == Page::Network {
             {
                 let root = self.network.breadcrumb.id();
                 if self.ui_context.propagate_event(&mv, root) {
                     changed = true;
                 }
             }
             // The router forwards DragUpdate to a mid-drag node grab; a plain move runs
             // the hover recompute. Rebuild every move while a drag is live (the router
             // drops drag_update's changed flag).
             {
                 let root = self.network.graph.id();
                 if self.ui_context.propagate_event(&mv, root) {
                     changed = true;
                 }
                 if self.ui_context.is_dragging {
                     changed = true;
                 }
             }
         } else if self.current_page == Page::Space {
             {
                 let root = self.space.breadcrumb.id();
                 if self.ui_context.propagate_event(&mv, root) {
                     changed = true;
                 }
             }
             // Tile hover drives both the highlight outline and the footer
             // readout, so only a change of tile is worth a rebuild — a move
             // within one tile repaints nothing.
             let hovered = self.space.tile_at(pos.x, pos.y);
             if hovered != self.space.hovered {
                 self.space.hovered = hovered;
                 changed = true;
             }
         }
 
         // Repaint only when the hovered page button actually changes. Page-button hover is
         // a binary color decided at rebuild time (see rebuild_layout), so idle pointer moves
         // don't need a redraw. Rebuilding unconditionally re-commits the translucent surface
         // every move, which makes the compositor re-blur the backdrop continuously.
         let hovered_button = self.page_buttons.iter().position(|(btn, _)| {
             let base = btn.base();
             self.cursor_x >= base.x && self.cursor_x <= base.x + base.w
                 && self.cursor_y >= base.y && self.cursor_y <= base.y + base.h
         });
         if hovered_button != self.hovered_button {
             self.hovered_button = hovered_button;
             changed = true;
         }
 
         if changed {
             *needs_rebuild = true;
             self.needs_rebuild = true;
         }
     }
     fn handle_mouse_input(&mut self, button: MouseButton, state: ElementState, pos: LogicalPosition, needs_rebuild: &mut bool) -> Option<Self::Message> {
         if button != MouseButton::Left && button != MouseButton::Right {
             return None;
         }
 
         // The preview pane's plate-dock menu (cce-ui RFC 7c-2) routes BEFORE
         // the generic context-menu dispatch below: that path targets widget
         // ContextActions, not these rows. Keyed on RELEASE: in this app the
         // routed-widget path upstream consumes left PRESSES before the hook
         // (only releases reliably arrive here).
         if button == MouseButton::Left
             && state == ElementState::Released
             && !self.plate_menu_actions.is_empty()
             && cce_ui::widget::context_menu::is_visible()
         {
             let (px, py) = (pos.x as f32, pos.y as f32);
             let picked = cce_ui::widget::context_menu::row_at(px, py)
                 .and_then(|row| self.plate_menu_actions.get(row).copied());
             cce_ui::widget::context_menu::hide();
             self.plate_menu_actions.clear();
             if let Some(action) = picked {
                 self.dispatch_preview_dock(action);
             }
             *needs_rebuild = true;
             self.needs_rebuild = true;
             return None;
         }
 
         // A left RELEASE on the preview pane's corner control opens its menu
         // (the designer also opens on release; presses do not reliably reach
         // this hook — see above). No press arming: the arming protocol
         // disambiguates click from dock-DRAG, and a single pane has nowhere
         // to dock.
         if button == MouseButton::Left && state == ElementState::Released {
             use cce_ui::widget::plate_dock as dock;
             let band = self.preview_dock_band();
             if let Some(c) = dock::corner_center(band, self.preview_dock.stubbed()) {
                 if dock::corner_hit(c, pos.x as f32, pos.y as f32) {
                     let rows = dock::standard_menu(self.preview_dock, false);
                     let (labels, actions): (Vec<String>, Vec<_>) = rows.into_iter().unzip();
                     cce_ui::widget::context_menu::show(
                         c.0 - dock::CORNER_R,
                         c.1 + dock::CORNER_R,
                         labels,
                         0,
                         self.paginator.base().id(),
                     );
                     self.plate_menu_actions = actions;
                     *needs_rebuild = true;
                     self.needs_rebuild = true;
                     return None;
                 }
             }
         }
 
         // The toolkit's shared context menu (breadcrumb, config-bound controls)
         // swallows the click — select or dismiss — before any widget routing.
         if cce_ui::widget::context_menu::is_visible() {
             if cce_ui::widget::context_menu::mouse_input(button, state, pos.x, pos.y, Some(&mut self.ui_context)) {
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
             return None;
         }
 
         if let Some((_path, textbox)) = &mut self.open_with_dialog {
             let r = open_with_rects(self.width as f32, self.height as f32);
             let (dialog_x, dialog_y, dialog_w, dialog_h) = (r.x, r.y, r.w, r.h);
             let (tb_x, tb_y, tb_w, tb_h) = r.tb;
             let (btn_cancel_x, btn_cancel_y, btn_cancel_w, btn_cancel_h) = r.cancel;
             let (btn_open_x, btn_open_y, btn_open_w, btn_open_h) = r.open;
 
             if state == ElementState::Pressed {
                 let clicked_inside = pos.x >= dialog_x && pos.x <= dialog_x + dialog_w && pos.y >= dialog_y && pos.y <= dialog_y + dialog_h;
                 if !clicked_inside {
                     textbox.unfocus();
                     self.ui_context.clear_focus();
                     return Some(Message::OpenWithCancel);
                 }
 
                 if button == MouseButton::Left {
                     if pos.x >= tb_x && pos.x <= tb_x + tb_w && pos.y >= tb_y && pos.y <= tb_y + tb_h {
                         let ev = cce_ui::widget::Event::MouseButton { button, state, x: pos.x, y: pos.y, local_x: pos.x, local_y: pos.y };
                         let root = textbox.id();
                         if self.ui_context.propagate_event(&ev, root) {
                             self.ui_context.set_focused(textbox);
                             *needs_rebuild = true;
                             self.needs_rebuild = true;
                         }
                     } else if pos.x >= btn_cancel_x && pos.x <= btn_cancel_x + btn_cancel_w && pos.y >= btn_cancel_y && pos.y <= btn_cancel_y + btn_cancel_h {
                         textbox.unfocus();
                         self.ui_context.clear_focus();
                         return Some(Message::OpenWithCancel);
                     } else if pos.x >= btn_open_x && pos.x <= btn_open_x + btn_open_w && pos.y >= btn_open_y && pos.y <= btn_open_y + btn_open_h {
                         textbox.unfocus();
                         self.ui_context.clear_focus();
                         return Some(Message::OpenWithSubmit);
                     } else {
                         textbox.unfocus();
                         self.ui_context.clear_focus();
                         *needs_rebuild = true;
                         self.needs_rebuild = true;
                     }
                 }
             } else {
                 if button == MouseButton::Left && textbox.editing {
                     let ev = cce_ui::widget::Event::MouseButton { button, state, x: pos.x, y: pos.y, local_x: pos.x, local_y: pos.y };
                     let root = textbox.id();
                     if self.ui_context.propagate_event(&ev, root) {
                         *needs_rebuild = true;
                         self.needs_rebuild = true;
                     }
                 }
             }
             return None;
         }
 
         if self.context_menu.visible {
             if state == ElementState::Pressed {
                 let cx = self.context_menu.x;
                 let cy = self.context_menu.y;
                 let cw = self.context_menu.w;
                 let ch = self.context_menu.h;
 
                 let mut clicked_option = None;
                 if pos.x >= cx && pos.x <= cx + cw && pos.y >= cy && pos.y <= cy + ch {
                     let idx = ((pos.y - cy) / ROW_H) as usize;
                     if idx < self.context_menu.options.len() && idx > 0 {
                         clicked_option = self.context_menu.options[idx].1.clone();
                     }
                 }
 
                 self.context_menu.visible = false;
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
 
                 if let Some(action) = clicked_option {
                     return Some(action);
                 }
 
                 if button == MouseButton::Right {
                     // Fall through to allow right-clicking another item to show a new context menu
                 } else {
                     return None;
                 }
             } else {
                 return None;
             }
         }
 
         if button == MouseButton::Right && state == ElementState::Pressed {
             let breadcrumb = match self.current_page {
                 Page::Browse => &mut self.browse.breadcrumb,
                 Page::Network => &mut self.network.breadcrumb,
                 Page::Space => &mut self.space.breadcrumb,
             };
             if breadcrumb.hit_test(pos.x, pos.y, &self.ui_context) {
                 let ev = cce_ui::widget::Event::MouseButton { button, state, x: pos.x, y: pos.y, local_x: pos.x, local_y: pos.y };
                 let root = breadcrumb.id();
                 // The breadcrumb opens the toolkit's shared context menu itself
                 // (open_context_menu → segment header + Copy Path); the app just
                 // routes the event and redraws — no app-side menu duplicate.
                 if self.ui_context.propagate_event(&ev, root) {
                     *needs_rebuild = true;
                     self.needs_rebuild = true;
                     return None;
                 }
             }
 
             // Row context menu: hit-test the list directly — rows stopped being
             // page_buttons when the List became a widget (Phase 6z), so the old
             // button probe never fired.
             {
                 let entry_idx = if self.current_page == Page::Browse {
                     self.browse.list.row_at(pos.x, pos.y)
                 } else {
                     None
                 };
 
                 if let Some(idx) = entry_idx {
                     if let Some(entry) = self.browse.entries.get(idx) {
                         let is_trash_dir = services::trash::is_trash_files_dir(&self.browse.current_dir);
                         let header = if entry.is_dir {
                             format!("[Directory] {}", entry.name)
                         } else {
                             format!("[File] {}", entry.name)
                         };
 
                         let mut options = vec![
                             (header, None),
                         ];
 
                         if entry.is_dir {
                             if is_project_dir(&entry.path) {
                                 options.push(("Open Project".to_string(), Some(Message::SelectOpen)));
                                 options.push(("Enter Directory".to_string(), Some(Message::Browse(pages::browse::BrowseMessage::NavigateToPath(entry.path.clone())))));
                             } else {
                                 options.push(("Open".to_string(), Some(Message::Browse(pages::browse::BrowseMessage::NavigateTo(idx)))));
                             }
                         } else {
                             options.push(("Select".to_string(), Some(Message::Browse(pages::browse::BrowseMessage::SelectEntry(idx)))));
                         }
 
                         options.push(("Open with...".to_string(), Some(Message::PromptOpenWith(entry.path.clone()))));
 
                         if is_trash_dir {
                             options.push(("Restore".to_string(), Some(Message::Browse(pages::browse::BrowseMessage::RestoreEntry(idx)))));
                             options.push(("Delete Permanently".to_string(), Some(Message::Browse(pages::browse::BrowseMessage::DeleteEntryPermanent(idx)))));
                             options.push(("Empty Trash".to_string(), Some(Message::Browse(pages::browse::BrowseMessage::EmptyTrash))));
                         } else {
                             options.push(("Delete".to_string(), Some(Message::Browse(pages::browse::BrowseMessage::DeleteEntry(idx)))));
                             if let Some(trash_files) = services::trash::files_dir() {
                                 options.push(("Open Trash".to_string(), Some(Message::Browse(pages::browse::BrowseMessage::NavigateToPath(trash_files)))));
                             }
                         }
 
                         // Calculate width
                         let (menu_w, menu_h) = context_menu_size(&options);
 
                         self.context_menu = ContextMenu {
                             visible: true,
                             x: pos.x,
                             y: pos.y,
                             w: menu_w,
                             h: menu_h,
                             options,
                             hovered: None,
                         };
                         *needs_rebuild = true;
                         self.needs_rebuild = true;
                         return None;
                     }
                 }
             }
         }
 
         let mut changed = false;
 
         log::debug!("MOUSE INPUT: {:?} {:?} pos=({}, {})", button, state, pos.x, pos.y);
         let ev = cce_ui::widget::Event::MouseButton { button, state, x: pos.x, y: pos.y, local_x: pos.x, local_y: pos.y };
         let menu_match = !self.select_mode && {
             // Self-routing composite: handle_event, not propagate (see pointer move).
             self.paginator.handle_event(&ev, &mut self.ui_context)
         };
         if menu_match {
             if let Some((idx, _)) = self.paginator.menu_click() {
                 if idx < Page::ALL.len() {
                     self.ui_context.clear_focus();
                     self.current_page = Page::ALL[idx];
                 }
             }
             *needs_rebuild = true;
             self.needs_rebuild = true;
             return None;
         }
 
         if { let root = self.view_dropdown.id(); self.ui_context.propagate_event(&ev, root) } {
             *needs_rebuild = true;
             self.needs_rebuild = true;
             if self.view_dropdown.take_change() {
                 // Indexed off Page::ALL rather than hand-mapped: the old
                 // `== 0 { Browse } else { Network }` silently sent every
                 // entry past the first to Network.
                 let new_page = Page::ALL
                     .get(self.view_dropdown.selected)
                     .copied()
                     .unwrap_or(Page::Browse);
                 return Some(Message::SwitchPage(new_page));
             }
             return None;
         }
 
         // The dissolved splitter's divider: a left press grabs it (stealing keyboard
         // focus like the legacy ctx.set_focused_ptr / release's clear_focus pair did),
         // a release ends the drag. A collapsed preview owns its column width;
         // the divider is not draggable until the pane expands.
         if button == MouseButton::Left && !self.preview_dock.collapsed {
             let split = match self.current_page {
                 Page::Browse => &mut self.browse_split,
                 Page::Network => &mut self.network_split,
                 Page::Space => &mut self.space_split,
             };
             if state == ElementState::Pressed {
                 if split.press(pos.x, pos.y) {
                     self.ui_context.clear_focus();
                     *needs_rebuild = true;
                     self.needs_rebuild = true;
                     return None;
                 }
             } else if split.release() {
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
                 return None;
             }
         }
 
         // Well focus follows the left click, keyed on RELEASE like the
         // plate-dock control above: the routed-widget path consumes left
         // PRESSES before this hook, so only releases reliably arrive here.
         // Every overlay above the page (plate-dock menu, context menu, dialog,
         // dropdown, divider grab) has already returned, so a release reaching
         // here is on page content: move the accent ring to the well it landed
         // in, then let the release do its normal work. Releases outside any
         // well (toolbar, plate) change nothing.
         if button == MouseButton::Left && state == ElementState::Released {
             let new_focus = if !self.preview_dock.collapsed
                 && let Some(well) = self.preview.well_at(pos.x, pos.y)
             {
                 Some(match well {
                     cce_files::preview_pane::PreviewWell::Top => FocusedWell::PreviewTop,
                     cce_files::preview_pane::PreviewWell::Bottom => FocusedWell::PreviewBottom,
                 })
             } else {
                 let split = match self.current_page {
                     Page::Browse => &self.browse_split,
                     Page::Network => &self.network_split,
                     Page::Space => &self.space_split,
                 };
                 let (lx, ly, lw, lh) = split.left_rect();
                 if pos.x >= lx && pos.x <= lx + lw && pos.y >= ly && pos.y <= ly + lh {
                     Some(FocusedWell::Content)
                 } else {
                     None
                 }
             };
             if let Some(f) = new_focus
                 && f != self.focused_well
             {
                 self.focused_well = f;
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
         }
 
         if self.current_page == Page::Browse {
             if self.select_mode {
                 if { let root = self.browse.save_name_box.id(); self.ui_context.propagate_event(&ev, root) } {
                     if state == ElementState::Pressed {
                         self.ui_context.set_focused(&mut self.browse.save_name_box);
                     }
                     *needs_rebuild = true;
                     self.needs_rebuild = true;
                 }
             }
             if self.browse.search_visible
                 && button == MouseButton::Left
                 && { let root = self.browse.search_box.id(); self.ui_context.propagate_event(&ev, root) }
             {
                 self.ui_context.set_focused(&mut self.browse.search_box);
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
             if button == MouseButton::Left
                 && self.browse.list.mouse_input(state == ElementState::Pressed, pos.x, pos.y)
             {
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
                 if let Some(idx) = self.browse.list.take_double_click() {
                     return Some(Message::Browse(pages::browse::BrowseMessage::NavigateTo(idx)));
                 }
                 if let Some(idx) = self.browse.list.take_click() {
                     return Some(Message::Browse(pages::browse::BrowseMessage::SelectEntry(idx)));
                 }
             }
             if button == MouseButton::Left && state == ElementState::Pressed {
                 if self.browse.breadcrumb.hit_test(pos.x, pos.y, &self.ui_context) {
                     if { let root = self.browse.breadcrumb.id(); self.ui_context.propagate_event(&ev, root) } {
                         if let Some(seg) = self.browse.breadcrumb.path_click() {
                             let target_path = pages::browse::path_to_segment(&self.browse.current_dir, seg);
                             self.fs_service.send(services::fs::FsRequest::ReadDirectory(target_path));
                             *needs_rebuild = true;
                             self.needs_rebuild = true;
                         }
                     }
                 }
             }
         } else if self.current_page == Page::Network {
             if button == MouseButton::Left {
                 if state == ElementState::Pressed {
                     if self.network.breadcrumb.hit_test(pos.x, pos.y, &self.ui_context) {
                         if { let root = self.network.breadcrumb.id(); self.ui_context.propagate_event(&ev, root) } {
                             if let Some(seg) = self.network.breadcrumb.path_click() {
                                 let target_path = pages::browse::path_to_segment(&self.browse.current_dir, seg);
                                 self.fs_service.send(services::fs::FsRequest::ReadDirectory(target_path));
                                 changed = true;
                             }
                         }
                     } else if {
                         // Routed press: a node grab records the drag target; the router's
                         // DragStart replaces the immediate drag_begin (3px threshold).
                         let root = self.network.graph.id();
                         self.ui_context.propagate_event(&ev, root)
                     } {
                         changed = true;
                     }
                 } else if state == ElementState::Released {
                     // The router delivers DragEnd (commit) before the release reaches
                     // Graph; a committed drag leaves the release arm inert.
                     let was_dragging = self.ui_context.is_dragging;
                     let root = self.network.graph.id();
                     if self.ui_context.propagate_event(&ev, root) || was_dragging {
                         changed = true;
                     }
                 }
             }
 
             // Sync selection from graph to browse state
             let has_parent = self.browse.current_dir.parent().is_some();
             let offset = if has_parent { 2 } else { 1 };
             if let Some(node_sel) = self.network.graph.selected_node() {
                 if node_sel >= offset {
                     let entry_idx = node_sel - offset;
                     if self.browse.selected != Some(entry_idx) {
                         self.browse.selected = Some(entry_idx);
                         if let Some(entry) = self.browse.entries.get(entry_idx) {
                             if self.select_mode {
                                 self.browse.save_name_box.text = entry.name.clone();
                                 if self.browse.save_name_box.editing {
                                     self.browse.save_name_box.edit_buffer = entry.name.clone();
                                 }
                             }
                             self.fs_service.send(services::fs::FsRequest::ReadPreview(entry.path.clone()));
                         }
                         changed = true;
                     }
                 } else {
                     if self.browse.selected.is_some() {
                         self.browse.selected = None;
                         pages::preview::update(&mut self.preview, pages::preview::PreviewMessage::Clear);
                         changed = true;
                     }
                 }
             } else {
                 if self.browse.selected.is_some() {
                     self.browse.selected = None;
                     pages::preview::update(&mut self.preview, pages::preview::PreviewMessage::Clear);
                     changed = true;
                 }
             }
 
             // Sync double click navigation
             if let Some(dbl_idx) = self.network.graph.double_clicked_node() {
                 self.network.graph.clear_double_clicked_node();
                 if has_parent && dbl_idx == 0 {
                     if let Some(parent) = self.browse.current_dir.parent() {
                         let parent_path = parent.to_path_buf();
                         self.fs_service.send(services::fs::FsRequest::ReadDirectory(parent_path));
                         changed = true;
                     }
                 } else if dbl_idx >= offset {
                     let entry_idx = dbl_idx - offset;
                     if let Some(entry) = self.browse.entries.get(entry_idx) {
                         if entry.is_dir && !is_project_dir(&entry.path) {
                             let path = entry.path.clone();
                             self.fs_service.send(services::fs::FsRequest::ReadDirectory(path));
                             changed = true;
                         } else if self.select_mode {
                             self.browse.save_name_box.text = entry.name.clone();
                             if self.browse.save_name_box.editing {
                                 self.browse.save_name_box.edit_buffer = entry.name.clone();
                             }
                             return Some(Message::SelectOpen);
                         }
                     }
                 }
             }
 
             if changed {
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
         } else if self.current_page == Page::Space {
             if button == MouseButton::Left && state == ElementState::Pressed {
                 if self.space.breadcrumb.hit_test(pos.x, pos.y, &self.ui_context) {
                     if { let root = self.space.breadcrumb.id(); self.ui_context.propagate_event(&ev, root) } {
                         if let Some(seg) = self.space.breadcrumb.path_click() {
                             let target_path = pages::browse::path_to_segment(&self.browse.current_dir, seg);
                             self.fs_service.send(services::fs::FsRequest::ReadDirectory(target_path));
                             changed = true;
                         }
                     }
                 } else if let Some(idx) = self.space.tile_at(pos.x, pos.y) {
                     let tile_path = self.space.tiles[idx].path.clone();
                     let is_dir = self.space.tiles[idx].is_dir;
 
                     // Same temporal double-click as the Browse list — the
                     // toolkit does not deliver a double-click event.
                     let now = std::time::Instant::now();
                     let is_double = self.last_space_path.as_ref() == Some(&tile_path)
                         && now.duration_since(self.last_space_click_time).as_millis() < 500;
                     self.last_space_click_time = now;
                     self.last_space_path = Some(tile_path.clone());
 
                     if is_double {
                         if is_dir {
                             // Navigating re-roots the map: ReadDirectory moves
                             // current_dir, and ensure_space_scan rescans it.
                             self.fs_service.send(services::fs::FsRequest::ReadDirectory(tile_path));
                         } else {
                             services::fs::open_file(&tile_path);
                         }
                     } else {
                         self.space.selected_path = Some(tile_path.clone());
                         self.fs_service.send(services::fs::FsRequest::ReadPreview(tile_path));
                     }
                     changed = true;
                 }
             }
             if changed {
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
         }
 
         if state == ElementState::Pressed {
             let clicked_search = self.current_page == Page::Browse && self.browse.search_visible && self.browse.search_box.hit_test(pos.x, pos.y, &self.ui_context);
             let clicked_save_name = self.select_mode && self.current_page == Page::Browse && self.browse.save_name_box.hit_test(pos.x, pos.y, &self.ui_context);
             if !clicked_search {
                 self.browse.search_box.unfocus();
             }
             if !clicked_save_name {
                 self.browse.save_name_box.unfocus();
             }
             if !clicked_search && !clicked_save_name {
                 self.ui_context.clear_focus();
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
         }
 
         if button == MouseButton::Left && state == ElementState::Released {
             for (btn, action) in &self.page_buttons {
                 let base = btn.base();
                 if pos.x >= base.x && pos.x <= base.x + base.w && pos.y >= base.y && pos.y <= base.y + base.h {
                     *needs_rebuild = true;
                     self.needs_rebuild = true;
                     return Some(action.clone());
                 }
             }
         }
 
         None
     }
 
     fn handle_mouse_wheel(&mut self, delta: &MouseScrollDelta, pos: LogicalPosition, needs_rebuild: &mut bool) {
         // Every page shares the preview pane on the right.
         if matches!(self.current_page, Page::Browse | Page::Network | Page::Space) {
             // The pane hit-tests its own laid-out rect and consumes any wheel
             // over its content region, scrolled or not.
             if let Some(changed) = (!self.preview_dock.collapsed)
                 .then(|| self.preview.wheel(delta, pos.x as f32, pos.y as f32))
                 .flatten()
             {
                 if cce_ui::scroll_debug() {
                     eprintln!("[scroll] files: preview consumed at ({:.0},{:.0})", pos.x, pos.y);
                 }
                 if changed {
                     *needs_rebuild = true;
                     self.needs_rebuild = true;
                 }
                 return;
             }
         }
 
         if self.current_page == Page::Browse {
             let hit = self.browse.list.wheel(delta, pos.x, pos.y);
             if cce_ui::scroll_debug() {
                 eprintln!("[scroll] files: browse.list.wheel at ({:.0},{:.0}) -> {hit}", pos.x, pos.y);
             }
             if hit {
                 // A trackpad finger moves the rows now: keep the hover on the
                 // row under the pointer (a wheel glide does this in tick).
                 self.browse.list.cursor_moved(self.cursor_x, self.cursor_y);
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
         } else if self.current_page == Page::Network {
             let ev = cce_ui::widget::Event::MouseWheel { delta: *delta, x: pos.x as f32, y: pos.y as f32, local_x: pos.x as f32, local_y: pos.y as f32 };
             let root = self.network.graph.id();
             if self.ui_context.propagate_event(&ev, root) {
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
         }
     }
 
     /// Tab walks the toolbar's plates and wells (cce-ui's navigation in
     /// plate terms); the file rows are the list's to walk.
     fn plate_navigation(&self) -> bool {
         true
     }
 
     /// The geometry is cached until the next rebuild — a moved focus ring needs one.
     fn focus_stepped(&mut self) {
         self.needs_rebuild = true;
     }
 
     fn handle_key_input(&mut self, event: &KeyEvent, needs_rebuild: &mut bool) -> Option<Self::Message> {
         if event.state != ElementState::Pressed {
             return None;
         }
 
         if let Some((_path, textbox)) = &mut self.open_with_dialog {
             if event.logical_key == cce_ui::widget::Key::Named(cce_ui::widget::NamedKey::Enter) {
                 textbox.unfocus();
                 self.ui_context.clear_focus();
                 return Some(Message::OpenWithSubmit);
             }
             if event.logical_key == cce_ui::widget::Key::Named(cce_ui::widget::NamedKey::Escape) {
                 textbox.unfocus();
                 self.ui_context.clear_focus();
                 return Some(Message::OpenWithCancel);
             }
             let kev = cce_ui::widget::Event::KeyInput(event.clone());
             let root = textbox.id();
             if self.ui_context.propagate_event(&kev, root) {
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
             }
             return None;
         }
 
         if self.current_page == Page::Network {
             let kev = cce_ui::widget::Event::KeyInput(event.clone());
             let root = self.network.graph.id();
             if self.ui_context.propagate_event(&kev, root) {
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
                 return None;
             }
         }
 
         if self.context_menu.visible {
             if event.logical_key == cce_ui::widget::Key::Named(cce_ui::widget::NamedKey::Escape) {
                 self.context_menu.visible = false;
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
                 return None;
             }
         }
 
         // An open view dropdown takes the keyboard — Escape closes it, arrows
         // move the hover, Enter selects — routed to the widget exactly like
         // its mouse events are (see handle_mouse_input). Gated on `open`:
         // this app routes keys per feature rather than to a whole tree, and
         // the dropdown was simply never on the list, which left its own
         // Escape handling unreachable.
         if self.view_dropdown.open {
             let kev = cce_ui::widget::Event::KeyInput(event.clone());
             if { let root = self.view_dropdown.id(); self.ui_context.propagate_event(&kev, root) } {
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
                 if self.view_dropdown.take_change() {
                     let new_page = Page::ALL
                         .get(self.view_dropdown.selected)
                         .copied()
                         .unwrap_or(Page::Browse);
                     return Some(Message::SwitchPage(new_page));
                 }
                 return None;
             }
         }
 
         // The dissolved List's search keys, app-side: the open shortcut shows the strip
         // and focuses the box; the close shortcut hides it and clears the filter (the
         // legacy List set just_changed after clearing, which surfaced as an empty
         // SearchChanged); anything else goes to the box while it is open.
         if self.current_page == Page::Browse {
             if !self.browse.search_visible {
                 let open_key = cce_ui::color::list_open_search_key();
                 if cce_ui::widget::match_key_shortcut(event, &open_key) {
                     self.browse.search_visible = true;
                     self.browse.search_box.focus();
                     self.ui_context.set_focused(&mut self.browse.search_box);
                     *needs_rebuild = true;
                     self.needs_rebuild = true;
                     return None;
                 }
             } else {
                 let close_key = cce_ui::color::list_close_search_key();
                 if cce_ui::widget::match_key_shortcut(event, &close_key) {
                     self.browse.search_visible = false;
                     self.browse.search_box.unfocus();
                     self.ui_context.clear_focus();
                     *needs_rebuild = true;
                     self.needs_rebuild = true;
                     return Some(Message::Browse(pages::browse::BrowseMessage::SearchChanged(String::new())));
                 }
                 if { let kev = cce_ui::widget::Event::KeyInput(event.clone()); let root = self.browse.search_box.id(); self.ui_context.propagate_event(&kev, root) } {
                     *needs_rebuild = true;
                     self.needs_rebuild = true;
                     if self.browse.search_box.take_change() {
                         return Some(Message::Browse(pages::browse::BrowseMessage::SearchChanged(
                             self.browse.search_box.text.clone()
                         )));
                     }
                     return None;
                 }
             }
         }
 
         // If the save_name_box is focused, forward key inputs to it
         if self.select_mode && self.browse.save_name_box.editing {
             if { let kev = cce_ui::widget::Event::KeyInput(event.clone()); let root = self.browse.save_name_box.id(); self.ui_context.propagate_event(&kev, root) } {
                 *needs_rebuild = true;
                 self.needs_rebuild = true;
                 if event.logical_key == cce_ui::widget::Key::Named(cce_ui::widget::NamedKey::Enter) {
                     self.browse.save_name_box.unfocus();
                     self.ui_context.clear_focus();
                     return Some(Message::SelectOpen);
                 }
                 return None;
             }
         }
 
         // Global key navigation. Arrow keys, Backspace, and Escape are fixed;
         // the rest resolve through input.kdl (see BrowseKeys).
         if self.current_page == Page::Browse {
             match &event.logical_key {
                 cce_ui::widget::Key::Named(cce_ui::widget::NamedKey::ArrowUp) => {
                     if let Some(index) = pages::browse::next_selection_index(&self.browse, pages::browse::BrowseNavigation::Up) {
                         return Some(Message::Browse(pages::browse::BrowseMessage::SelectEntry(index)));
                     }
                 }
                 cce_ui::widget::Key::Named(cce_ui::widget::NamedKey::ArrowDown) => {
                     if let Some(index) = pages::browse::next_selection_index(&self.browse, pages::browse::BrowseNavigation::Down) {
                         return Some(Message::Browse(pages::browse::BrowseMessage::SelectEntry(index)));
                     }
                 }
                 cce_ui::widget::Key::Named(cce_ui::widget::NamedKey::Escape) => {
                     if self.select_mode {
                         std::process::exit(1);
                     }
                 }
                 cce_ui::widget::Key::Named(cce_ui::widget::NamedKey::Backspace) => {
                     if let Some(parent) = self.browse.current_dir.parent() {
                         return Some(Message::Browse(pages::browse::BrowseMessage::NavigateToPath(parent.to_path_buf())));
                     }
                 }
                 _ => {}
             }
 
             let m = |chord: &str| cce_ui::widget::match_key_shortcut(event, chord);
             if m(&self.keys.open_file) {
                 if let Some(idx) = self.browse.selected {
                     if let Some(entry) = self.browse.entries.get(idx) {
                         if entry.is_dir && !is_project_dir(&entry.path) {
                             return Some(Message::Browse(pages::browse::BrowseMessage::NavigateTo(idx)));
                         } else {
                             return Some(Message::SelectOpen);
                         }
                     }
                 } else if self.save_mode {
                     return Some(Message::SelectOpen);
                 }
             } else if m(&self.keys.select_next) {
                 if let Some(index) = pages::browse::next_selection_index(&self.browse, pages::browse::BrowseNavigation::Down) {
                     return Some(Message::Browse(pages::browse::BrowseMessage::SelectEntry(index)));
                 }
             } else if m(&self.keys.select_prev) {
                 if let Some(index) = pages::browse::next_selection_index(&self.browse, pages::browse::BrowseNavigation::Up) {
                     return Some(Message::Browse(pages::browse::BrowseMessage::SelectEntry(index)));
                 }
             } else if m(&self.keys.enter_dir) {
                 if let Some(idx) = self.browse.selected {
                     if let Some(entry) = self.browse.entries.get(idx) {
                         if entry.is_dir && !is_project_dir(&entry.path) {
                             return Some(Message::Browse(pages::browse::BrowseMessage::NavigateTo(idx)));
                         }
                     }
                 }
             } else if m(&self.keys.parent_dir) {
                 if let Some(parent) = self.browse.current_dir.parent() {
                     return Some(Message::Browse(pages::browse::BrowseMessage::NavigateToPath(parent.to_path_buf())));
                 }
             } else if m(&self.keys.delete_entry) {
                 if let Some(idx) = self.browse.selected {
                     return Some(Message::Browse(pages::browse::BrowseMessage::DeleteEntry(idx)));
                 }
             } else if m(&self.keys.toggle_hidden) {
                 return Some(Message::Browse(pages::browse::BrowseMessage::ToggleHidden));
             }
         }
 
         None
     }
 }
 
 // ── Main ────────────────────────────────────────────────────────────
 
 #[tokio::main]
 async fn main() {
     cce_ui::engine::run::<FilesystemApp>();
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
 
     const WIN: [f32; 4] = [0.0, 0.0, 1000.0, 700.0];
 
     fn rect_overlay(x: f32, y: f32, w: f32, h: f32) -> pages::PageContent {
         let mut pc = pages::PageContent::new();
         pc.rect([0.0, 0.0, 0.0, 1.0], x, y, w, h);
         pc
     }
 
     fn plate_overlay(x: f32, y: f32, w: f32, h: f32) -> pages::PageContent {
         let mut pc = pages::PageContent::new();
         pc.plates.push(([0.0, 0.0, 0.0, 1.0], x, y, w, h, 8.0, 4.0));
         pc
     }
 
     /// A box the overlay covers outright is discarded, not clipped.
     #[test]
     fn a_covered_box_is_dropped() {
         let menu = rect_overlay(300.0, 253.0, 430.0, 120.0);
         assert!(occlude_against(WIN, 320.0, 400.0, 300.0, 317.0, &[&menu]).is_none());
     }
 
     /// An overlay's face is a plate now, so the sweep has to see plates or the
     /// page's text draws straight through the surface covering it.
     #[test]
     fn a_plate_occludes_like_a_rect() {
         let menu = plate_overlay(300.0, 253.0, 430.0, 120.0);
         assert!(occlude_against(WIN, 320.0, 400.0, 300.0, 317.0, &[&menu]).is_none());
     }
 
     /// The regression. A file-list row's name sits well left of the menu, but the
     /// row's box runs under it, and the hovered menu row's fill dips into that
     /// box's band from below without spanning it horizontally. Clamping both axes
     /// crossed the y bounds over into an empty band and the whole line vanished,
     /// the name along with the part under the menu. Only the x cut is legitimate
     /// here: the name must survive whole.
     #[test]
     fn an_overlay_that_only_dips_in_does_not_erase_the_line() {
         let menu = rect_overlay(300.0, 253.0, 430.0, 120.0);
         let hover = rect_overlay(305.0, 294.0, 420.0, 20.0);
 
         let b = occlude_against(WIN, 40.0, 420.0, 288.0, 305.0, &[&menu, &hover])
             .expect("a line the overlay only dips into still has a visible run");
 
         assert_eq!(b[2], 300.0, "clipped at the menu's left edge");
         assert_eq!(b[3], WIN[3], "and NOT clipped vertically — that is the erasure");
         assert_eq!(b[1], WIN[1]);
         assert_eq!(b[0], WIN[0]);
     }
 
     /// The y cut is still right when the overlay spans the box horizontally: no
     /// horizontal trim can uncover anything, so the surviving run is the strip
     /// above (here) or below the overlay.
     #[test]
     fn an_overlay_spanning_the_box_clips_it_vertically() {
         let menu = rect_overlay(300.0, 253.0, 430.0, 120.0);
         let b = occlude_against(WIN, 320.0, 400.0, 240.0, 257.0, &[&menu]).expect("straddles the top");
         assert_eq!(b[3], 253.0, "clipped to the strip above the menu");
         assert_eq!(b[2], WIN[2], "and not trimmed horizontally");
     }
 
     /// Of the two sides an overlay leaves, the cut keeps the wider one — the most
     /// of the box that a single clip rect can still express.
     #[test]
     fn the_cut_keeps_the_wider_side() {
         // Overlay near the box's right end: the long run before it survives.
         let right = rect_overlay(380.0, 0.0, 200.0, 700.0);
         let b = occlude_against(WIN, 40.0, 420.0, 288.0, 305.0, &[&right]).unwrap();
         assert_eq!(b[2], 380.0);
         assert_eq!(b[0], WIN[0]);
 
         // Overlay near the left end: the run after it survives instead.
         let left = rect_overlay(0.0, 0.0, 80.0, 700.0);
         let b = occlude_against(WIN, 40.0, 420.0, 288.0, 305.0, &[&left]).unwrap();
         assert_eq!(b[0], 80.0);
         assert_eq!(b[2], WIN[2]);
     }
 }