Task #512: Per-recipient Delete in Notes Inbox

Adds a recipient-scoped delete that's distinct from Archive: a recipient
can remove a note from their own inbox without touching the underlying
note or other recipients' rows.

Backend (artifacts/api-server/src/routes/notes.ts):
- DELETE /notes/received/:id — recipient-only; 404 if no row.
- POST /notes/received/bulk-delete — body {ids:number[]}, max 500,
  single SQL DELETE, returns {ok, notFound} for partial-success UI.
- Both registered before DELETE /notes/:id so Express matches /received
  first.

Frontend (artifacts/tx-os):
- New hooks useDeleteReceivedNote / useBulkDeleteReceivedNotes in
  src/lib/notes-api.ts; both invalidate notes + folders queries.
- Inbox bulk bar gets a Delete button (rose) next to Archive plus a
  confirm AlertDialog with all/none/partial toasts (src/pages/notes.tsx).
- ThreadDialog gets a per-row Delete next to Archive plus a single
  confirm dialog that closes the thread on success.
- AR + EN locale strings added for all new copy.

Tests:
- artifacts/api-server/tests/notes-inbox-delete.test.mjs — recipient
  delete, non-recipient/sender 404, bulk mix of valid+missing ids, and
  DB-level checks that the note + other recipients survive.
- artifacts/tx-os/tests/notes-inbox-bulk-delete.spec.mjs — Playwright
  flow seeds three received notes, bulk-deletes two from the inbox,
  then deletes the third via ThreadDialog per-row.

artifacts/tx-os/src/locales/en.json

@@ -907,6 +907,15 @@
     "bulkArchivedAll_one": "Archived 1 note",
     "bulkArchivePartial": "Archived {{ok}} of {{total}}; {{failed}} failed",
     "bulkArchiveNone": "Could not archive the selected notes",
+    "bulkDeleteInboxConfirmTitle": "Delete {{n}} inbox notes?",
+    "bulkDeleteInboxConfirmTitle_one": "Delete 1 inbox note?",
+    "bulkDeleteInboxConfirmBody": "This removes the notes from your inbox and archive. The sender keeps their copy.",
+    "bulkDeletedInboxAll": "Deleted {{n}} notes from your inbox",
+    "bulkDeletedInboxAll_one": "Deleted 1 note from your inbox",
+    "bulkDeleteInboxPartial": "Deleted {{ok}} of {{total}}; {{failed}} were already gone",
+    "bulkDeleteInboxNone": "Could not delete the selected notes",
+    "deleteInboxConfirmTitle": "Delete this note from your inbox?",
+    "deletedInboxOne": "Note removed from your inbox",
     "moreActions": "More actions",
     "empty": "Your notes will appear here",
     "emptyArchived": "No archived notes",