feat(db): User.onboardingTourCompleted flag

v1.4.15 Phase B5 — first commit. Adds a boolean column
`users.onboarding_tour_completed` (default false) to track whether the
user has finished or explicitly dismissed the new spotlight tour that
overlays the dashboard on first arrival.

This is *distinct* from the existing `onboarding_completed_at` column
which gates the 3-step wizard at `/onboarding`. The new tour runs
*after* the wizard, on the dashboard, walking new users through the
tile strip, quick-add menu, insights page, integrations, and (when
B4 ships) achievements. Flipped to `true` on tour completion or
explicit dismiss; users can replay the tour from
Settings → Account → "Restart onboarding tour".

Migration `0030_onboarding_tour_completed` is additive-only (column
default `false`), so no backfill is needed and existing users will
see the tour on next dashboard load — acceptable because the tour is
a 4-6 step tooltip overlay with a Skip button on every step, not a
forced flow.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

prisma/migrations/0030_onboarding_tour_completed/migration.sql

@@ -0,0 +1,14 @@
+-- v1.4.15 Phase B5: track completion of the post-onboarding spotlight
+-- tour that overlays the dashboard for first-time users.
+--
+-- Distinct from `onboarding_completed_at` (the 3-step wizard at
+-- `/onboarding`). Once the wizard finishes the user lands on the
+-- dashboard; this column tracks whether the spotlight tour that walks
+-- the user through the tile strip / quick-add menu / insights /
+-- integrations has been seen-or-dismissed. Default false so existing
+-- users who never saw the tour will see it on next dashboard load
+-- (acceptable: it's a 4-6 step tooltip overlay with a Skip button on
+-- every step, not a forced flow). Users can replay it from
+-- Settings → Account → "Restart onboarding tour".
+ALTER TABLE "users"
+    ADD COLUMN "onboarding_tour_completed" BOOLEAN NOT NULL DEFAULT false;

prisma/schema.prisma

@@ -78,6 +78,16 @@ model User {
 
   // Onboarding
   onboardingCompletedAt DateTime? @map("onboarding_completed_at")
+  // v1.4.15 Phase B5: tracks whether the user has finished (or
+  // explicitly dismissed) the spotlight tour that overlays the
+  // dashboard on first arrival. Distinct from the wizard at
+  // `/onboarding` (which is gated by `onboardingCompletedAt`); the
+  // tour runs *after* the wizard, on the dashboard itself, walking
+  // the user through the tile strip, quick-add menu, insights,
+  // integrations, and achievements. Default false; flipped to true
+  // on tour completion or dismiss; users can replay the tour from
+  // Settings → Account.
+  onboardingTourCompleted Boolean @default(false) @map("onboarding_tour_completed")
 
   // HealthKit (iOS) integration config — list of per-metric direction toggles.
   // Shape: { entries: [{ id, kind, direction, enabled }], lastSyncedAt }