feat(ui): My Day actions, orphan-aware grouping, menu restructure

Pending UI work:
- My Day add/remove context actions on task rows (parent removal cascades to children)
- orphan-aware grouping: a child whose parent isn't in view renders as a top-level row, not an indented draft
- shell menu restructure (Worker / Repositories submenus); 'Finalize plan' action, drop 'Queue subtasks sequentially'
- notes editor refinements
- subtask-row hover tweak (Surface3, no transition)
- bump Avalonia 12.0.0 -> 12.0.4

src/ClaudeDo.Localization/locales/de.json

@@ -110,10 +110,12 @@
     "ctxRunInteractively": "Interaktiv ausführen",
     "ctxOpenPlanningSession": "Planungssitzung öffnen",
     "ctxResumePlanningSession": "Planungssitzung fortsetzen",
+    "ctxFinalizePlanningSession": "Plan finalisieren",
     "ctxDiscardPlanningSession": "Planungssitzung verwerfen",
-    "ctxQueueSubtasks": "Teilaufgaben nacheinander einreihen",
     "ctxScheduleFor": "Planen für...",
     "ctxClearSchedule": "Zeitplan entfernen",
+    "ctxRemoveFromMyDay": "Aus Mein Tag entfernen",
+    "ctxAddToMyDay": "Zu Mein Tag hinzufügen",
     "badgeDraft": "ENTWURF",
     "badgePlanned": "GEPLANT",
     "approve": "Genehmigen",
@@ -421,6 +423,8 @@
   "shell": {
     "menu": {
       "help": "Hilfe",
+      "worker": "Worker",
+      "repositories": "Repositories",
       "checkForUpdates": "Nach Updates suchen",
       "restartWorker": "Worker neu starten",
       "worktrees": "Worktrees…",

src/ClaudeDo.Localization/locales/en.json

@@ -110,10 +110,12 @@
     "ctxRunInteractively": "Run interactively",
     "ctxOpenPlanningSession": "Open planning Session",
     "ctxResumePlanningSession": "Resume planning Session",
+    "ctxFinalizePlanningSession": "Finalize plan",
     "ctxDiscardPlanningSession": "Discard planning session",
-    "ctxQueueSubtasks": "Queue subtasks sequentially",
     "ctxScheduleFor": "Schedule for...",
     "ctxClearSchedule": "Clear schedule",
+    "ctxRemoveFromMyDay": "Remove from My Day",
+    "ctxAddToMyDay": "Add to My Day",
     "badgeDraft": "DRAFT",
     "badgePlanned": "PLANNED",
     "approve": "Approve",
@@ -421,6 +423,8 @@
   "shell": {
     "menu": {
       "help": "Help",
+      "worker": "Worker",
+      "repositories": "Repositories",
       "checkForUpdates": "Check for updates",
       "restartWorker": "Restart worker",
       "worktrees": "Worktrees…",