Audit and fix Swagger/OpenAPI accuracy; regenerate served spec

The route-level annotations were 100% present, but the committed/served
spec (swagger-output.json) was stale and several response schemas had
drifted from the controllers. This aligns the docs with actual behavior
and regenerates the spec.

Served spec was stale (64/67 operations). Regenerating picks up three
routes that were added after the last generation:
  - POST /api/v1/auth/sso/totp
  - GET  /api/v1/admin/discord-bot/config
  - PUT  /api/v1/admin/discord-bot/config
plus a stale /auth/logout summary.

Response-shape corrections (annotation now matches controller output):
  - Mutation endpoints do NOT return the generic { message } envelope.
    Deletes echo { id } / { slug }; toggles return { deleted },
    { unlinked }, { totp_enabled }, or { ip, removed }. Documented as-is
    via new DeletedId/DeletedSlug/DeletedFlag/UnlinkedFlag/TotpState/
    UnbanResult components. (The API is intentionally inconsistent here;
    recorded rather than normalized — see follow-up note.)
  - POST /account/totp/setup: otpauth_url -> otpauthUrl (TotpSetup)
  - PUT  /admin/site-mode: { mode } -> { site_mode, changed_at, changed_by }
  - GET  /account: full User -> AccountStatus (id/username/role/totp_enabled)
  - GET  /account/identities: add linked_at (LinkedIdentity)
  - GET  /public/status: add status_message (PublicStatus)
  - POST /auth/sso/totp: user is SafeUser, not full User
  - GET  /dashboard: description/shape corrected (posts+users, no wiki)

Schema completeness:
  - Provider (public discovery): { id, name, icon, loginUrl, priority },
    not { id, name, kind }
  - ProviderConfig: add hasSecret, builtin, health (ProviderHealth)
  - Post: add excerpt, author_id, published_at
  - MobileTokenResponse.expiresIn: duration string ("15m"), not integer

Config: declare the Admin · Discord Bot tag (was used but undeclared).

Auth model and the internal/external boundary were verified correct and
left unchanged: cookie + bearer are both accepted on session routes (dual
security annotations are accurate), and /internal/* runs on a separate
listener already excluded from the scan.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019rao86n5cXpwAyjdBFEshV

server/src/router/v1/public/public.routes.js

@@ -22,7 +22,7 @@ publicRouter.get(
   // #swagger.tags = ['Public']
   // #swagger.summary = 'Site mode / status'
   // #swagger.description = 'Current site mode (live or maintenance) so the client can show the maintenance page.'
-  /* #swagger.responses[200] = { description: 'Site status', content: { "application/json": { schema: { type: "object", properties: { mode: { type: "string", example: "live" } } } } } } */
+  /* #swagger.responses[200] = { description: 'Site status', content: { "application/json": { schema: { $ref: "#/components/schemas/PublicStatus" } } } } */
   ctrl.getStatus,
 )
 publicRouter.post(