chore: remove presi mobile app, update outdated mobile docs

- Delete apps/presi/apps/mobile/ (outdated Firebase-based, web app is primary)
- Update presi CLAUDE.md: remove mobile references, fix landing page status
- Update manadeck mobile CLAUDE.md: replace Supabase refs with Mana Core Auth
- Fix picture mobile: pin nativewind version, add shared-logger dependency
- Remove dev:presi:mobile script and env generation config

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/generate-env.mjs

@@ -299,15 +299,6 @@ const APP_CONFIGS = [
 		},
 	},
 
-	// Presi Mobile (Expo)
-	{
-		path: 'apps/presi/apps/mobile/.env',
-		vars: {
-			EXPO_PUBLIC_BACKEND_URL: (env) => `http://localhost:${env.PRESI_BACKEND_PORT || '3008'}`,
-			EXPO_PUBLIC_MANA_CORE_AUTH_URL: (env) => env.MANA_CORE_AUTH_URL,
-		},
-	},
-
 	// Presi Web (SvelteKit)
 	{
 		path: 'apps/presi/apps/web/.env',