fix: resolve duplicate commit field and add commitId filter test

- Replace spread operator with explicit field selection to avoid
  duplicate commit field from getApks() and parseApkFilename()
- Add test case for commitId parameter filtering to ensure
  the filter parameter works correctly with new metadata extraction

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

app/api/__tests__/apks.test.ts

@@ -70,4 +70,52 @@ describe('/api/apks', () => {
     expect(response.status).toBe(500);
     expect(data.error).toBe('Failed to fetch APK files');
   });
+
+  it('should filter APKs by commitId parameter', async () => {
+    const mockApks = [
+      {
+        name: 'ft_timeshift_0_42_57ef3a60d.apk',
+        size: 15728640,
+        modifiedAt: new Date('2026-03-04T14:30:00Z'),
+      },
+      {
+        name: 'ft_0_42_ff9ff3441.apk',
+        size: 15728640,
+        modifiedAt: new Date('2026-03-04T14:30:00Z'),
+      },
+      {
+        name: 'ft_0_42_abc1234.apk',
+        size: 15728640,
+        modifiedAt: new Date('2026-03-04T14:30:00Z'),
+      },
+    ];
+
+    const filteredApks = [
+      mockApks[1],
+    ];
+
+    (getApks as jest.Mock).mockImplementation((project, version, commitId) => {
+      if (commitId === 'ff9ff3441') {
+        return Promise.resolve(filteredApks);
+      }
+      return Promise.resolve(mockApks);
+    });
+
+    (parseApkFilename as jest.Mock)
+      .mockReturnValue({ environment: 'product', commit: 'ff9ff3441', isValid: true });
+
+    const request = new Request('http://localhost:3000/api/apks?project=FT&version=0_42&commit=ff9ff3441');
+    const response = await GET(request);
+    const data = await response.json();
+
+    expect(response.status).toBe(200);
+    expect(data).toHaveLength(1);
+    expect(data[0]).toMatchObject({
+      name: 'ft_0_42_ff9ff3441.apk',
+      environment: 'product',
+      commit: 'ff9ff3441',
+    });
+
+    expect(getApks).toHaveBeenCalledWith('FT', '0_42', 'ff9ff3441');
+  });
 });

app/api/apks/route.ts

@@ -21,7 +21,8 @@ export async function GET(request: Request) {
     const apksWithMetadata = apks.map(apk => {
       const parsed = parseApkFilename(apk.name);
       return {
-        ...apk,
+        name: apk.name,
+        size: apk.size,
         environment: parsed.environment,
         commit: parsed.commit,
         modifiedAt: apk.modifiedAt.toISOString(),