Centralize legacy app shell services

docs/modernization/roadmap.md

@@ -557,13 +557,14 @@ transform-mode setup continues.
 `pano_cli plan-file-menu` exposes app-core planning for the top-level File menu
 commands, including new/open/import, save/save-as/save-version, share, resize,
 cloud upload/browse, JPEG export, and export-submenu routing. Direct File menu
-commands now dispatch through `FileMenuServices` before legacy dialogs, pickers,
-platform services, cloud code, and canvas workflows continue.
+commands now dispatch through `FileMenuServices` in the shared app-shell bridge
+`src/legacy_app_shell_services.*` before legacy dialogs, pickers, platform
+services, cloud code, and canvas workflows continue.
 `pano_cli plan-export-menu` exposes app-core planning for File menu export
 choices, including image, layer, cube-face, depth, animation-frame, MP4, and
 timelapse dialog routing plus license/canvas gating. Export menu commands now
-dispatch through `DocumentExportMenuServices` before legacy export dialogs and
-renderer/video execution continue.
+dispatch through `DocumentExportMenuServices` in the shared app-shell bridge
+before legacy export dialogs and renderer/video execution continue.
 `pano_cli plan-grid-operation` exposes app-core planning for grid heightmap
 pick/load/reload/clear, lightmap render capability/limit checks, and heightmap
 commit used by the live grid panel before legacy image loading, OpenGL texture
@@ -579,8 +580,8 @@ toolbar/status-bar shell, including open/save dialogs, undo/redo availability,
 clear-history availability, clear-canvas no-canvas blocking, message-box
 creation, and settings dialog routing. `pp_app_core` now also owns a
 `MainToolbarServices` executor boundary, so `App::init_toolbar_main` dispatches
-through a legacy adapter before legacy dialogs, history/canvas adapters, and
-settings UI execution continue.
+through `src/legacy_app_shell_services.*` before legacy dialogs,
+history/canvas adapters, and settings UI execution continue.
 `pano_cli plan-quick-operation` exposes app-core planning for quick brush/color
 slot selection versus popup opening, plus quick mini-state restore/reset
 validation used by the live quick panel. Quick-panel execution now dispatches
@@ -590,16 +591,17 @@ preview, and preset popup adapter continues.
 planning for top-level Tools commands and floating-panel requests, including
 already-visible no-ops, panel chrome metadata, shortcuts, camera reset,
 grid-clear, and platform-only SonarPen gating. Direct Tools commands now
-dispatch through `ToolsMenuServices` before the legacy UI/panel/canvas/platform
-adapters continue execution. The live animation panel route now also checks
-animation panel visibility and applies animation panel layout state instead of
-using the grid panel by mistake.
+dispatch through `ToolsMenuServices` in the shared app-shell bridge before the
+legacy UI/panel/canvas/platform adapters continue execution. The live animation
+panel route now also checks animation panel visibility and applies animation
+panel layout state instead of using the grid panel by mistake.
 `pano_cli plan-about-menu` exposes app-core planning for About menu help,
 about, what's-new, crash-test, and performance-test commands, including
 versioned what's-new labels, diagnostic gating, and no-canvas performance-test
 blocking. `pp_app_core` now also owns an `AboutMenuServices` executor boundary,
-so `App::init_menu_about` dispatches through a legacy adapter before legacy
-dialogs, platform crash hooks, and Canvas performance strokes continue.
+so `App::init_menu_about` dispatches through `src/legacy_app_shell_services.*`
+before legacy dialogs, platform crash hooks, and Canvas performance strokes
+continue.
 `pp_platform_api` now owns a headless `PlatformServices` interface for
 startup storage path preparation, clipboard text, cursor visibility,
 virtual-keyboard visibility, UI-thread lifecycle hooks, render-context