feat(integrations): remove the moodLog integration

Mood has been a first-class module here for a long time, with entries,
structured tags, rated factors and notes. The bridge to the external moodLog
service had nothing left to add, and its Settings card was withdrawn in
a56e6fe61 on the promise of a dedicated removal. This delivers it.

Removed: the hourly `moodlog-sync` queue, cron and handler binding; the
inbound webhook and its shared-secret handling; the reverse push and its four
call sites; the pull-sync module; the per-user credential routes and the
instance-wide toggle; the entry on the `/api/integrations/status` envelope,
the `IntegrationKey` union, the cadence map and the display-name table; the
boot-time secret rotation pass; 22 message keys per locale.

Migration 0271 drops the five `users` credential columns and
`app_settings.mood_log_global`, clears the ledger row for the provider, and
deletes the retired pg-boss schedule so no cron keeps enqueuing work no
handler drains.

Mood data is untouched. `mood_entries` is not named anywhere in the migration
and cannot be reached from it: the dropped columns carry no index, constraint
or foreign key, and `mood_entries.user_id` references `users(id)`, not any of
them. Rows the bridge imported keep `source = 'MOODLOG'`, and every read path
- list filter, source badge, exports, backups - still resolves that value.

`src/lib/validations/moodlog.ts` held the native mood-entry schemas alongside
the bridge's own; it is now `validations/mood.ts` and carries only the former.

docs/diagrams/01-data-flow.svg

@@ -1,6 +1,6 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 620" font-family="ui-sans-serif, -apple-system, Segoe UI, Roboto, sans-serif" role="img" aria-labelledby="title desc">
   <title id="title">HealthLog data flow — device to insight</title>
-  <desc id="desc">Five-stage pipeline: sources (Withings, Apple Health export, iPhone HealthKit, manual entry, moodLog.app) feed ingest endpoints, which write to Postgres Measurement and MeasurementRollup tables, then surface on Dashboard tiles, Insights cards, the AI Coach, and the Doctor PDF.</desc>
+  <desc id="desc">Five-stage pipeline: sources (Withings, Apple Health export, iPhone HealthKit, manual entry, Nightscout) feed ingest endpoints, which write to Postgres Measurement and MeasurementRollup tables, then surface on Dashboard tiles, Insights cards, the AI Coach, and the Doctor PDF.</desc>
 
   <!-- Dracula background -->
   <rect x="0" y="0" width="1200" height="620" fill="#282a36" />
@@ -45,8 +45,8 @@
     <text x="120" y="411" text-anchor="middle" fill="#bd93f9" font-size="11">PWA · iOS Shortcuts</text>
 
     <rect x="30" y="444" width="180" height="56" rx="10" fill="#44475a" stroke="#8be9fd" stroke-width="1.5" />
-    <text x="120" y="469" text-anchor="middle" font-weight="600">moodLog.app</text>
-    <text x="120" y="487" text-anchor="middle" fill="#bd93f9" font-size="11">webhook</text>
+    <text x="120" y="469" text-anchor="middle" font-weight="600">Nightscout</text>
+    <text x="120" y="487" text-anchor="middle" fill="#bd93f9" font-size="11">pull sync</text>
   </g>
 
   <!-- INGEST (orange #ffb86c) -->

docs/diagrams/03-self-hosting-topology.svg

@@ -81,7 +81,7 @@
     <rect x="1010" y="240" width="160" height="100" rx="10" fill="#44475a" stroke="#8be9fd" stroke-width="1.5" stroke-dasharray="4 4" />
     <text x="1090" y="266" text-anchor="middle" fill="#f8f8f2" font-size="13" font-weight="600">Withings</text>
     <text x="1090" y="282" text-anchor="middle" fill="#6272a4" font-size="11">Apple Health</text>
-    <text x="1090" y="298" text-anchor="middle" fill="#6272a4" font-size="11">moodLog.app</text>
+    <text x="1090" y="298" text-anchor="middle" fill="#6272a4" font-size="11">Nightscout</text>
     <text x="1090" y="314" text-anchor="middle" fill="#6272a4" font-size="11">AI provider</text>
     <text x="1090" y="332" text-anchor="middle" fill="#bd93f9" font-size="11">(per-user)</text>
   </g>

docs/diagrams/README.md

@@ -8,7 +8,7 @@ copy.
 
 | File                           | Story it tells                                                                                                                                                                                                                                        |
 | ------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `01-data-flow.svg`             | Sources (Withings, Apple Health export.zip, iPhone HealthKit, manual, moodLog) → ingest endpoints → Measurement + MeasurementRollup → reads (rollup probe / live SQL fallback / cache) → surfaces (dashboard, insights, Coach, doctor PDF).           |
+| `01-data-flow.svg`             | Sources (Withings, Apple Health export.zip, iPhone HealthKit, manual, Nightscout) → ingest endpoints → Measurement + MeasurementRollup → reads (rollup probe / live SQL fallback / cache) → surfaces (dashboard, insights, Coach, doctor PDF).        |
 | `02-coach-pipeline.svg`        | User question → snapshot builder → prompt assembler → provider chain (ChatGPT OAuth / OpenAI / Anthropic / local / admin-shared) → response parser → cited reply with mini-charts.                                                                    |
 | `03-self-hosting-topology.svg` | Internet → reverse proxy (TLS) → Next.js app (port 3000) ↔ pg-boss worker ↔ Postgres 16, plus GHCR image pull, optional Coolify autodeploy, optional S3 off-host backup.                                                                              |
 | `04-source-priority.svg`       | Three sources for the same metric on the same day → resolver picks one canonical row per (cumulative vs point) ladder. Losing rows stay in the audit trail.                                                                                           |

docs/ui-guidelines.md

@@ -324,7 +324,7 @@ The 1.4 release splits the legacy 3150-LOC settings monolith into one
 route per top-level section:
 
 - `/settings/account` — profile, password, passkeys, account deletion.
-- `/settings/integrations` — Withings, moodLog, Telegram, ntfy, Web Push.
+- `/settings/integrations` — Withings, Nightscout, Telegram, ntfy, Web Push.
 - `/settings/notifications` — channel matrix + quiet hours + reminders.
 - `/settings/dashboard` — tile layout editor, default ranges, threshold
   overrides.
@@ -426,7 +426,7 @@ control. Behavior:
 - **History**: each test writes a row to a tiny per-integration log
   visible in the section. Last 5 tests, timestamp + result.
 - **Coverage**: required for Telegram, ntfy, Web Push, AI provider,
-  Withings, moodLog, GlitchTip, Umami, email (when wired), backup
+  Withings, Nightscout, GlitchTip, Umami, email (when wired), backup
   target. Headless E2E asserts presence + working call for each.
 
 ### 4.6 Server actions and mutations