feat(app): auth, orgs/events UI, router guards, and dev tooling

- Add Sanctum auth flow (store, composables, login, axios interceptors)
- Add dashboard, organisation list/detail, events CRUD dialogs
- Wire router guards, navigation, organisation switcher in layout
- Replace Vuexy @db types in NavSearchBar; add @iconify/types; themeConfig title typing
- Vuetify settings.scss + resolve configFile via fileURLToPath; drop dead path aliases
- Root index redirects to dashboard; fix events table route name
- API: DevSeeder + DatabaseSeeder updates; docs TEST_SCENARIO; corporate identity assets

Made-with: Cursor

apps/app/src/styles/settings.scss

@@ -0,0 +1,3 @@
+// Vuetify variable entry (vite-plugin-vuetify `styles.configFile`).
+// Re-exports Vuexy overrides from the standard assets location.
+@forward "../assets/styles/variables/vuetify";