Add slow recognition diagnostics

Ariver

2026-07-01 2547282e0942a09b67fccfd53cf62a403ccd4a52

 privatevoice.src/app_live_caption_test.go

@@ -38,12 +38,12 @@
   }
}

func TestReleaseTailCaptureDelayDefaultsToProtectionWindow(t *testing.T) {
func TestReleaseTailCaptureDelayDefaultsToNoProtectionWindow(t *testing.T) {
   a := &App{}
   a.replaceEngine(plainTestEngine{})

   if got := a.releaseTailCaptureDelay(); got != defaultReleaseTailDelay {
      t.Fatalf("releaseTailCaptureDelay() = %v, want %v", got, defaultReleaseTailDelay)
   if got := a.releaseTailCaptureDelay(); got != 0 {
      t.Fatalf("releaseTailCaptureDelay() = %v, want 0", got)
   }
}

@@ -56,6 +56,28 @@
   }
}

func TestSlowRecognitionReason(t *testing.T) {
   tests := []struct {
      name        string
      recognizeMS int64
      totalMS     int64
      want        string
   }{
      {name: "fast", recognizeMS: 2000, totalMS: 2500, want: ""},
      {name: "recognize", recognizeMS: 2001, totalMS: 2400, want: "recognize"},
      {name: "total", recognizeMS: 1000, totalMS: 2501, want: "total"},
      {name: "both", recognizeMS: 2001, totalMS: 2501, want: "recognize,total"},
   }

   for _, tt := range tests {
      t.Run(tt.name, func(t *testing.T) {
         if got := slowRecognitionReason(tt.recognizeMS, tt.totalMS); got != tt.want {
            t.Fatalf("slowRecognitionReason(%d, %d) = %q, want %q", tt.recognizeMS, tt.totalMS, got, tt.want)
         }
      })
   }
}

func TestHoldPreCaptureUsesEngineCapability(t *testing.T) {
   a := &App{}
   a.replaceEngine(holdPreCaptureTestEngine{enabled: true})