feat(activities): brand-kit logo + app name in the events page header

Replace the bare "Events" h1 with the brand-kit logo paired with the
standalone's localized name. Deployers get per-standalone logo
control via branding/<dep>/icons/events/logo.{svg,png}; the
component itself stays brand-agnostic.

Brand-kit plumbing:

- `resolveAppLogo(app?)` in vite-branding.ts mirrors the resolution
  chain pwa-assets.config.ts already uses for PWA icons
  (per-standalone svg → png → global svg → png).
- `brandAppLogoAliasEntry(app)` returns a vite alias array entry. A
  regex matches `@brand-app-logo` with or without a `?url` query so
  the file resolves cleanly under either form.
- vite.events.config.ts switches its resolve.alias to the array form
  so the per-standalone regex doesn't clash with the bare `@brand`
  string alias.

Component side: a single `import brandAppLogoUrl from '@brand-app-logo?url'`
gives EventsPage the best-resolved logo without any fallback chain
in the component.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

vite.events.config.ts

@@ -5,7 +5,13 @@ import { defineConfig, type Plugin } from 'vite'
 import { VitePWA } from 'vite-plugin-pwa'
 import { ViteImageOptimizer } from 'vite-plugin-image-optimizer'
 import { visualizer } from 'rollup-plugin-visualizer'
-import { brand, brandAlias, brandAssetsPlugin, brandManifestName } from './vite-branding'
+import {
+  brand,
+  brandAlias,
+  brandAppLogoAliasEntry,
+  brandAssetsPlugin,
+  brandManifestName,
+} from './vite-branding'
 
 /**
  * Plugin to rewrite dev server requests to events.html
@@ -117,10 +123,14 @@ export default defineConfig(({ mode }) => ({
       }),
   ],
   resolve: {
-    alias: {
-      ...brandAlias,
-      '@': fileURLToPath(new URL('./src', import.meta.url)),
-    },
+    // Array form so we can mix the per-standalone logo regex (needs to
+    // match `@brand-app-logo?url` query suffix) with the bare string
+    // aliases without one shadowing the other.
+    alias: [
+      brandAppLogoAliasEntry('events'),
+      ...Object.entries(brandAlias).map(([find, replacement]) => ({ find, replacement })),
+      { find: '@', replacement: fileURLToPath(new URL('./src', import.meta.url)) },
+    ],
   },
   build: {
     outDir: 'dist-events',