feat(p8): meeting-studio demo + smoke-calendar; P8 verification green

Task 8.7: apps/meeting-studio (Vite, port 5178) — schedule a meeting, invite
attendees, toggle per-attendee recording consent, generate transcript (BLOCKED
until unanimous consent — KG-14), summarize, see AI summary + action-item inbox.
scripts/smoke-calendar.mjs proves the P8 guarantees end to end: direct schedule,
consent gate BLOCKED→READY (KG-14), summary linked to a P7 ai_artifact, action
items, attendee-visibility exclusion (Scenario 6), meeting_request genesis,
simulated provider sync (idempotent).

P8 verification: 95 tests green, pnpm -r build all packages+demos, boundary
passes and fails on meeting-web->service, smoke-calendar PASS, prior smokes
(realtime/inbox/support/adapter/route/ai) PASS.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/meeting-studio/tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "lib": ["ES2022", "DOM"],
+    "jsx": "react-jsx",
+    "types": ["react", "react-dom"],
+    "noEmit": true
+  },
+  "include": ["src/**/*.ts", "src/**/*.tsx"]
+}