feat: activity feed — enriched audit events + global/project timelines (#45)

* feat(branding): white-label — public /branding, admin write, shell theming

app_settings branding.* keys (product name, logo/favicon URLs, accent
color, docs/support links). Public GET /branding so login and shell
theme pre-auth; admin writes via PUT /settings.

useBranding() applies document.title, accent CSS var and favicon;
BrandWordmark replaces hardcoded wordmarks; admin Platform settings
gain a Branding form. MCP containr_branding_get + settings_update.

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* feat(invites): team invite links — admin create/revoke, public accept

Admins mint single-use invite links (sha256-hashed token at rest,
optional email binding, configurable TTL). Public endpoints let the
accept page validate the link and register — working even while
public signup is disabled.

- migration + sqlc queries/model for user_invites
- POST /admin/invites (returns one-time token+url), GET list, DELETE revoke
- GET /auth/invites/:token public validation, POST /auth/accept-invite
- CLI containr invites list|create|revoke; MCP invites tools
- /auth/accept-invite page (expired/used/invalid states, bound-email lock)
- Admin page Team invites section: create, copy link, revoke
- OpenAPI + generated types + CLI guide

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* feat(admin): impersonate user — 15-min token, audit-logged

POST /admin/users/:id/impersonate mints a short-lived bearer token
(impersonated_by claim) for support/debugging. Admin accounts cannot
be impersonated; every mint is audit-logged with actor + target.

- CLI: containr admin impersonate <user-id> (works via CONTAINR_TOKEN)
- MCP: containr_admin_impersonate
- Admin UI: per-user Impersonate action → token modal with usage hint
- OpenAPI + generated types

Verified live: token resolves to target, admin target 403, audit row.

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* feat(git): GitHub App manifest self-provisioning + app-level webhook

Admins create the instance GitHub App in-browser instead of hand-
setting GITHUB_APP_* env vars:

- POST /admin/git/github-app/manifest builds the manifest + URL;
  the frontend auto-submits it to github.com
- /git/github-app/callback page exchanges the code via
  POST /admin/git/github-app/convert; credentials persist in
  app_settings (precedence over env)
- GET /admin/git/github-app reports configured/source
- POST /api/git/github-app/webhook — single app-level push receiver,
  HMAC-verified, dispatches via extracted dispatchPushToServices
- install-url + installation-token paths resolve settings→env
- CLI: containr admin github-app status|manifest|convert; MCP tools
- Git providers UI shows "Set up GitHub App" for admins when
  unconfigured

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* feat: activity feed — enriched audit events, global + per-project timelines

audit_logs gains severity/category/label columns derived from
resource+action at write time; legacy rows are classified on read and
backfilled at boot in batches.

- GET /activity: global feed scoped to the caller's visible projects
  (admins see all); severity/category/resource/project_id/since
  filters, page+limit
- GET /projects/:id/activity: timeline correlated to the project's
  services, deployments, databases and the project record; access
  mirrors project read rules
- Retention worker prunes rows older than AUDIT_RETENTION_DAYS
  (default 90, 0 disables), running once at boot then daily
- project.create/delete now audited so timelines aren't empty
- CLI `containr activity` with filter flags; MCP tools
  containr_activity_list + containr_project_activity
- Frontend: /activity page (severity chips, icon per category) under
  Operate nav; project workspace gains an Activity view tab
- OpenAPI + generated types + CLI docs

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---------

Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

app/frontend/src/lib/api-client.ts

@@ -1928,6 +1928,44 @@ export async function getOperations(): Promise<OperationsView> {
   return requestJson<OperationsView>('/operations');
 }
 
+export type ActivityEntry = {
+  id: string;
+  user_email: string;
+  resource: string;
+  resource_id: string;
+  action: string;
+  details?: string;
+  severity: 'info' | 'success' | 'warning' | 'error';
+  category: string;
+  label: string;
+  created_at: string;
+};
+
+export type ActivityPage = {
+  activity: ActivityEntry[];
+  page?: number;
+  has_more?: boolean;
+};
+
+export async function listActivity(filters: {
+  severity?: string; category?: string; resource?: string;
+  project_id?: string; page?: number; limit?: number;
+} = {}): Promise<ActivityPage> {
+  const params = new URLSearchParams();
+  if (filters.severity) params.set('severity', filters.severity);
+  if (filters.category) params.set('category', filters.category);
+  if (filters.resource) params.set('resource', filters.resource);
+  if (filters.project_id) params.set('project_id', filters.project_id);
+  if (filters.page) params.set('page', String(filters.page));
+  if (filters.limit) params.set('limit', String(filters.limit));
+  const q = params.toString();
+  return requestJson<ActivityPage>(`/activity${q ? `?${q}` : ''}`);
+}
+
+export async function listProjectActivity(projectId: string, page = 1): Promise<ActivityPage> {
+  return requestJson<ActivityPage>(`/projects/${projectId}/activity?page=${page}&limit=50`);
+}
+
 export type Banner = {
   id: string;
   title: string;