fix(rtl): fix resize direction, path alignment, and i18n gaps

- Invert resize delta in RTL for drawer (useDrawerResize) and split panel (RightPanel)
- Add dir="ltr" to path/code value elements in instance-info panel
- Replace hardcoded English strings with i18n: Hide/Show files, No git changes yet,
  Hide unchanged regions / Show full file, diff toolbar titles, + Create worktree
- Fix sessionList.status.idle: "בסרלה" → "מוכן" in session.ts
- Fix text-align: left → start in message-reasoning-toggle and tool-call-io-toggle
- Fix left: 0 → inset-inline-start: 0 in attachment-chip-preview

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/ui/src/lib/i18n/messages/en/instance.ts

@@ -124,6 +124,18 @@ export const instanceMessages = {
   "instanceShell.filesShell.viewerTitle": "Change viewer",
   "instanceShell.filesShell.viewerPlaceholder": "Detailed change rendering will be added in the next step.",
   "instanceShell.filesShell.viewerEmpty": "No file selected.",
+  "instanceShell.filesShell.hideFiles": "Hide files",
+  "instanceShell.filesShell.showFiles": "Show files",
+  "instanceShell.gitChanges.noSessionSelected": "Select a session to view git changes.",
+  "instanceShell.gitChanges.loading": "Loading git changes…",
+  "instanceShell.gitChanges.empty": "No git changes yet.",
+  "instanceShell.diff.hideUnchanged": "Hide unchanged regions",
+  "instanceShell.diff.showFull": "Show full file",
+  "instanceShell.diff.switchToSplit": "Switch to split view",
+  "instanceShell.diff.switchToUnified": "Switch to unified view",
+  "instanceShell.diff.enableWordWrap": "Enable word wrap",
+  "instanceShell.diff.disableWordWrap": "Disable word wrap",
+  "instanceShell.worktree.create": "+ Create worktree",
 
   "instanceShell.plan.noSessionSelected": "Select a session to view plan.",
   "instanceShell.plan.empty": "Nothing planned yet.",