Add the account area and account-synced Appearance preferences

Stage 1 PR 6 (ADR 0062). /account shows who is signed in; /account/appearance
chooses System, Light, or Dark and reduced motion (System, Reduce, Allow).

- Core: ekklesia_core_user_preference, one typed, CHECK-constrained,
  nullable column per preference (null = never chosen), migration
  0008_user_preferences (additive), @ekklesia/core/account store, and the
  authenticated-baseline permission core.account.self.manage.
- API: GET /api/v1/account (name, email, preferences) and partial
  PATCH /api/v1/account/preferences, self-only by construction: no user id
  is accepted anywhere; trusted Origin and body limit on the mutation.
- Shell: the account control shows name, email, and initials (never the
  unvetted image URL) and offers Account, Appearance, Sign out; native
  radio groups apply a choice at once through the ADR 0060 controller and
  save it; the server's answer wins and a failed save reverts.
- First paint: a classic, same-origin, render-blocking appearance.js in
  <head> applies a two-word localStorage cache before paint (no inline
  script, CSP unchanged). The account replaces the cache on every load,
  sign-out clears it, and other tabs follow via the storage event.
- Deploy smoke: real-Chromium checks for light/dark, OS emulation,
  overrides, reload persistence, pre-paint, Shadow DOM modules, reduced
  motion, the display staying light, and phone width; the browser
  container gets a 512 MiB /dev/shm so a long session no longer fails
  requests with ERR_INSUFFICIENT_RESOURCES.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/api/src/app.ts

@@ -8,6 +8,7 @@ import type {
   AuthorizationStore,
   PermissionRegistry,
 } from "@ekklesia/core/authorization";
+import type { AccountStore } from "@ekklesia/core/account";
 import type { DashboardStore } from "@ekklesia/core/dashboard";
 import type { DeviceStore } from "@ekklesia/core/devices";
 import { type EkklesiaIdentityRuntime, IdentityRuntimeError } from "@ekklesia/core/identity";
@@ -28,6 +29,7 @@ import type { Context, MiddlewareHandler } from "hono";
 import { Hono } from "hono";
 import { cors } from "hono/cors";
 import { AUTH_REQUEST_MAX_BODY_BYTES, platformBodyLimit } from "./body-limits.js";
+import { createAccountRoutes } from "./account-routes.js";
 import type { DashboardHostAssets } from "./dashboard-host-assets.js";
 import { createDashboardHostRoutes } from "./dashboard-host-routes.js";
 import { createDashboardRoutes } from "./dashboard-routes.js";
@@ -141,6 +143,10 @@ export interface CreateApiAppOptions {
    * presentation only — nothing reachable through this store influences discovery, dependency
    * ordering, module startup, or any authorization decision. */
   readonly dashboard: DashboardStore;
+  /** Core's persistence for a signed-in person's own account summary and preferences (ADR 0062).
+   * Required like `dashboard`: every installation has accounts. Reachable only through routes that
+   * take the account from the session, never from the request. */
+  readonly account: AccountStore;
   /**
    * The built Dashboard's two files, read once by production startup (ADR 0044). Required rather
    * than optional, unlike `displayHostAssets`: every installation has a Dashboard, and a missing
@@ -469,6 +475,20 @@ export function createApiApp(options: CreateApiAppOptions): Hono {
     }),
   );
 
+  // The signed-in person's own account and preferences (ADR 0062). Self-only by construction: the
+  // account is always the session's, and no request value can name another. See
+  // `./account-routes.js`.
+  app.route(
+    "/",
+    createAccountRoutes({
+      evaluator: options.authorization.evaluator,
+      registry: options.authorization.registry,
+      runtime,
+      store: options.account,
+      trustedOrigins: allowedOrigins,
+    }),
+  );
+
   // Mounted before module routes and, critically, under its own sibling prefix: `/api/v1/modules/`
   // belongs entirely to installed modules, so the platform's own lifecycle resource lives beside it
   // rather than inside it. See `./module-lifecycle-routes.js`.