feat(ui): enable TimelineDialog with full-text search across all message roles in one session (#1104)

* feat: register open_timeline_dialog shortcut (mod+t)

* feat: enhance TimelineDialog with full-text search across all roles

* feat: add open_timeline_dialog shortcut labels to all locales

* feat: wire TimelineDialog into ChatContainer

* fix: add setTimelineDialogOpen to hook dependency array

* fix: tighten timeline dialog interactions

---------

Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/ui/src/lib/shortcuts.ts

@@ -165,6 +165,13 @@ const SHORTCUT_ACTIONS: ReadonlyArray<ShortcutAction> = [
     description: 'Toggle the session sidebar',
     customizable: true,
   },
+  {
+    id: 'open_timeline_dialog',
+    defaultCombo: 'mod+t',
+    label: 'Open conversation timeline',
+    description: 'Search and navigate within current conversation',
+    customizable: true,
+  },
   {
     id: 'toggle_right_sidebar',
     defaultCombo: 'mod+b',