feat(astrolabe): add Nextcloud PHP app for MCP server management

Adds a native Nextcloud app "Astroglobe" that provides:
- Personal settings: OAuth authorization for background MCP access
- Admin settings: Server status and vector sync monitoring
- API endpoints for MCP server communication

The app uses PKCE OAuth flow to obtain tokens for the MCP server,
enabling features like background vector sync per ADR-018.

Includes:
- PHP app structure (controllers, services, settings)
- Vue.js frontend components
- Docker compose mount configuration
- Installation hook for development testing
- ADR-018 documentation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

third_party/astroglobe/appinfo/routes.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Routes configuration for MCP Server UI app.
+ *
+ * Defines URL routes for OAuth flow and form handlers.
+ */
+
+return [
+	'routes' => [
+		// OAuth routes
+		[
+			'name' => 'oauth#initiateOAuth',
+			'url' => '/oauth/authorize',
+			'verb' => 'GET',
+		],
+		[
+			'name' => 'oauth#oauthCallback',
+			'url' => '/oauth/callback',
+			'verb' => 'GET',
+		],
+		[
+			'name' => 'oauth#disconnect',
+			'url' => '/oauth/disconnect',
+			'verb' => 'POST',
+		],
+
+		// API routes (form handlers)
+		[
+			'name' => 'api#revokeAccess',
+			'url' => '/api/revoke',
+			'verb' => 'POST',
+		],
+
+		// Vector search API routes
+		[
+			'name' => 'api#search',
+			'url' => '/api/search',
+			'verb' => 'GET',
+		],
+		[
+			'name' => 'api#vectorStatus',
+			'url' => '/api/vector-status',
+			'verb' => 'GET',
+		],
+	],
+];