Rebuild Mode1Svelte with SvelteKit + Node.js adapter

- Migrated from Bun/Hono to modern SvelteKit tech stack
- Implemented complete authentication module (Azure MSAL + PocketBase)
- Created 5 API endpoints for auth operations (config, graph token, validate, refresh, compare)
- Built interactive Svelte dashboard with mobile optimization (iPhone 16)
- Added Node.js adapter (@sveltejs/adapter-node) for production deployment
- Integrated Tailwind CSS with responsive design
- Fixed orchestrator to spawn Mode1Svelte with Node.js on port 3005
- Updated systemd service (job-info-test.service) to start orchestrator on port 3006
- Port configuration locked: 3005 = Mode1Svelte, 3006 = Orchestrator
- Full TypeScript type safety throughout application
- Services auto-managed by orchestrator with systemd integration

Mode1Svelte/src/routes/api/auth/validate-pb-token/+server.ts

@@ -0,0 +1,39 @@
+import { json, type RequestHandler } from '@sveltejs/kit';
+import { BackendAuth } from '$lib/auth/backend';
+
+const backendAuth = new BackendAuth(
+  {
+    clientId: process.env.CLIENT_ID,
+    tenantId: process.env.TENANT_ID,
+    clientSecret: process.env.CLIENT_SECRET,
+  },
+  process.env.PB_DB
+);
+
+export const POST: RequestHandler = async ({ request }) => {
+  try {
+    const body = await request.json();
+    const token = body.pbToken;
+
+    if (!token) {
+      return json({ valid: false, error: 'No token provided' }, { status: 400 });
+    }
+
+    const isValid = await backendAuth.pbValidator.validateUserToken(token);
+    const user = isValid ? await backendAuth.pbValidator.getUserRecord(token) : null;
+
+    return json({
+      valid: isValid,
+      user: user ? {
+        id: user.id,
+        email: user.email,
+        name: user.name,
+      } : null,
+    });
+  } catch (error) {
+    return json(
+      { valid: false, error: error instanceof Error ? error.message : 'Validation failed' },
+      { status: 500 }
+    );
+  }
+};