Show preset wish names in the current UI language

Preset wishes were created with `name: t(preset.labelKey)`, so the
translated string was persisted as the wish's name. A wish created while
the UI was Swedish stayed "Jul" in English forever -- the Swedish text
was the data, so no display-layer change could fix it.

Wish names are user-editable free text, so `name` cannot simply be
translated at render time. Migration 007 adds a nullable
`leave_wish.name_message_key` recording where a name came from: preset
wishes store the i18n key alongside the translated literal, and the UI
renders the key when present.

The key is cleared server-side the moment `name` actually changes,
compared against the stored value rather than trusting the caller, so no
client can forget to clear it and silently revert a user's own name to a
preset label.

An unknown key (a stale row, a renamed key) falls back to the stored
literal via an isTranslationKey guard, so a bad key can never crash the
page or leak a raw key to the user. Rows predating this column keep
displaying their stored name.

_FULL_SCHEMA in db/connection.py is updated in step with the migration.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RXMhc9nT6sNz1SL4j8dznL

backend/app/repositories_impl/sqlite/leave_wish_repository.py

@@ -26,6 +26,7 @@ class SQLiteLeaveWishRepository(LeaveWishRepository):
             workspace_id=UUID(row["workspace_id"]),
             child_id=UUID(row["child_id"]) if row["child_id"] is not None else None,
             name=row["name"],
+            name_message_key=row["name_message_key"],
             window_start_month=row["window_start_month"],
             window_start_day=row["window_start_day"],
             window_end_month=row["window_end_month"],
@@ -54,18 +55,19 @@ class SQLiteLeaveWishRepository(LeaveWishRepository):
         await self._conn.execute(
             """
             INSERT INTO leave_wish
-                (id, workspace_id, child_id, name,
+                (id, workspace_id, child_id, name, name_message_key,
                  window_start_month, window_start_day, window_end_month, window_end_day,
                  target_weeks, recurrence, first_year, last_year,
                  priority, parent_mode, parent_personal_data_uuid, goal_override,
                  window_mode, created_at, updated_at)
-            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
             """,
             (
                 str(item.id),
                 str(item.workspace_id),
                 str(item.child_id) if item.child_id is not None else None,
                 item.name,
+                item.name_message_key,
                 item.window_start_month,
                 item.window_start_day,
                 item.window_end_month,
@@ -109,7 +111,7 @@ class SQLiteLeaveWishRepository(LeaveWishRepository):
         cursor = await self._conn.execute(
             """
             UPDATE leave_wish
-               SET child_id = ?, name = ?,
+               SET child_id = ?, name = ?, name_message_key = ?,
                    window_start_month = ?, window_start_day = ?,
                    window_end_month = ?, window_end_day = ?,
                    target_weeks = ?, recurrence = ?, first_year = ?, last_year = ?,
@@ -120,6 +122,7 @@ class SQLiteLeaveWishRepository(LeaveWishRepository):
             (
                 str(item.child_id) if item.child_id is not None else None,
                 item.name,
+                item.name_message_key,
                 item.window_start_month,
                 item.window_start_day,
                 item.window_end_month,