Add Morning Routine to Admin and TV greeting state

Adds a per-user Morning Routine item list that appears in the TV
dashboard Activities panel during the "Good Morning" countdown
(before the first block starts).

- morning_routine_items table (auto-created on startup)
- CRUD API at /api/morning-routine (auth-required)
- Items included in the public DashboardSnapshot so TV gets them
  without auth
- Morning Routine section in Admin page (same add/edit/delete UX
  as subject options)
- TV Activities column shows routine items when no block is active,
  switches to subject options once a block starts

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

frontend/src/stores/schedule.js

@@ -13,6 +13,7 @@ export const useScheduleStore = defineStore('schedule', () => {
   const blockElapsedCache = ref({})   // blockId → total elapsed seconds (survives block switches)
   const dayStartTime = ref(null)      // "HH:MM:SS" string or null
   const dayEndTime = ref(null)        // "HH:MM:SS" string or null
+  const morningRoutine = ref([])      // list of text strings shown during greeting state
 
   const currentBlock = computed(() =>
     session.value?.current_block_id
@@ -40,6 +41,7 @@ export const useScheduleStore = defineStore('schedule', () => {
     if (snapshot.child) child.value = snapshot.child
     dayStartTime.value = snapshot.day_start_time || null
     dayEndTime.value = snapshot.day_end_time || null
+    morningRoutine.value = snapshot.morning_routine || []
     // Restore elapsed time from server-computed value and seed the per-block cache
     const serverElapsed = snapshot.block_elapsed_seconds || 0
     if (snapshot.session?.current_block_id && serverElapsed > 0) {
@@ -165,6 +167,7 @@ export const useScheduleStore = defineStore('schedule', () => {
     blockElapsedCache,
     dayStartTime,
     dayEndTime,
+    morningRoutine,
     currentBlock,
     progressPercent,
     applySnapshot,