Fix prop confirmation bug, add Wan 2.7 model, refine multiple UI details, improve prop generation quality and aspect ratio, remove text overlays from Asset Center created images, and optimize prop filtering logic

tests/unit/model-capabilities/bailian-video-capabilities.test.ts

@@ -17,6 +17,12 @@ describe('bailian video capabilities catalog', () => {
     }
   })
 
+  it('registers wan2.7 i2v as dual-mode', () => {
+    const capabilities = findBuiltinCapabilities('video', 'bailian', 'wan2.7-i2v')
+    expect(capabilities?.video?.generationModeOptions).toEqual(['normal', 'firstlastframe'])
+    expect(capabilities?.video?.firstlastframe).toBe(true)
+  })
+
   it('registers bailian kf2v models as firstlastframe-only', () => {
     const models = [
       'wan2.2-kf2v-flash',