fix: don't send Content-Type on bodyless DELETE, include full server data in project queries

- Only set Content-Type: application/json when request body is present (fixes
  Fastify rejecting empty DELETE with "Body cannot be empty" 400 error)
- Changed PROJECT_INCLUDE to return full server objects instead of just {id, name}
  so project server listings show transport, package, image columns

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/cli/tests/api-client.test.ts

@@ -21,6 +21,16 @@ beforeAll(async () => {
         res.writeHead(201, { 'Content-Type': 'application/json' });
         res.end(JSON.stringify({ id: 'srv-new', ...body }));
       });
+    } else if (req.url === '/api/v1/servers/srv-1' && req.method === 'DELETE') {
+      // Fastify rejects empty body with Content-Type: application/json
+      const ct = req.headers['content-type'] ?? '';
+      if (ct.includes('application/json')) {
+        res.writeHead(400, { 'Content-Type': 'application/json' });
+        res.end(JSON.stringify({ error: "Body cannot be empty when content-type is set to 'application/json'" }));
+      } else {
+        res.writeHead(204);
+        res.end();
+      }
     } else if (req.url === '/api/v1/missing' && req.method === 'GET') {
       res.writeHead(404, { 'Content-Type': 'application/json' });
       res.end(JSON.stringify({ error: 'Not found' }));
@@ -75,6 +85,12 @@ describe('ApiClient', () => {
     await expect(client.get('/anything')).rejects.toThrow();
   });
 
+  it('performs DELETE without Content-Type header', async () => {
+    const client = new ApiClient({ baseUrl: `http://localhost:${port}` });
+    // Should succeed (204) because no Content-Type is sent on bodyless DELETE
+    await expect(client.delete('/api/v1/servers/srv-1')).resolves.toBeUndefined();
+  });
+
   it('sends Authorization header when token provided', async () => {
     // We need a separate server to check the header
     let receivedAuth = '';