Store readiness: in-app account deletion, privacy policy, terms, listing copy

Closes the remaining store-compliance gaps before App Store / Play
submission:

- Account deletion (App Store guideline 5.1.1): DELETE /me removes the
  user row (usage cascades). The app exposes it through one quiet
  'Account' caption link under the chat, visible only when signed in,
  driving two native dialogs (Sign out / Delete account with a
  destructive confirm) — no new views, no menus, minimalism intact.
  Deletion signs out and resets the app; copy notes that store
  subscriptions are cancelled in App Store / Play settings.
- docs/store/privacy-policy.md: the complete data inventory (matching
  the actual schema), transient OpenAI processing with no training, no
  profiling or ads, GDPR legal bases and rights, in-app erasure.
- docs/store/terms-of-service.md: not-therapy positioning with crisis
  guidance, AI-generated-content caveat, 18+ eligibility,
  auto-renewal/cancellation terms, liability, Swedish governing law.
- docs/store/listing.md: App Store and Play copy written to the
  honest-claims rule (subtitle 'Think Beyond Thought', keywords,
  descriptions), plus App Privacy and Data safety questionnaire
  mappings.
- LAUNCH.md updated: host the policy/terms, set store URLs, use the
  prepared listing copy.
- Tests: 30 passing (adds DELETE /me coverage).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0118DaxZR36RpnY524vRqx3z

services/api/src/handler.ts

@@ -1,7 +1,14 @@
 import type { APIGatewayProxyEventV2, APIGatewayProxyResultV2 } from 'aws-lambda';
 import { generateReply, type ChatMessage } from './chat.js';
 import { config } from './config.js';
-import { getOrCreateUser, getUsage, incrementUsage, resetUsage, type UserRow } from './db.js';
+import {
+  deleteUser,
+  getOrCreateUser,
+  getUsage,
+  incrementUsage,
+  resetUsage,
+  type UserRow,
+} from './db.js';
 import { verifyAndApplyPurchase } from './subscription/index.js';
 import type { VerifyPurchaseRequest } from './subscription/types.js';
 import { canSendMessage, shouldResetUsage } from './usage.js';
@@ -142,6 +149,12 @@ export async function handler(event: APIGatewayProxyEventV2): Promise<APIGateway
     switch (route) {
       case 'GET /me':
         return await handleMe(user);
+      case 'DELETE /me':
+        // In-app account deletion (App Store guideline 5.1.1). Removes the
+        // user and usage rows; store subscriptions are cancelled by the user
+        // in App Store / Play settings.
+        await deleteUser(user.id);
+        return json(200, { deleted: true });
       case 'POST /chat':
         return await handleChat(user, event.body);
       case 'POST /subscription/verify':