feat: clear a meal-plan day or the whole week in one action

New bulk-delete route for the owner's own weekStart-scoped plan
(mirrors recipes/bulk's DELETE), plus ?ids= support added to the
existing shared-plan DELETE route (kept ?entryId= working
unchanged). UI: hover-reveal trash icon per day header, "Clear week"
button in the toolbar, one shared confirm dialog for both.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/messages/en.json

@@ -829,7 +829,13 @@
     "removeEntry": "Remove meal",
     "markCooked": "Mark as cooked",
     "markCookedSuccess": "Marked as cooked",
-    "markCookedFailed": "Failed to mark as cooked"
+    "markCookedFailed": "Failed to mark as cooked",
+    "clearDay": "Clear day",
+    "clearWeek": "Clear week",
+    "clearDayConfirmTitle": "Clear {day}?",
+    "clearWeekConfirmTitle": "Clear the whole week?",
+    "clearConfirmDescription": "This removes every planned meal shown — it doesn't delete the recipes themselves.",
+    "clearedSuccess": "{count, plural, one {1 meal cleared} other {{count} meals cleared}}"
   },
   "pantry": {
     "title": "Pantry",