fix(bridge): load dung VSTi theo track (V9) - bo early-return mui theo flag, load qua Tauri invoke khi co path, guard path sai (WaveObserver vs Nexus), chi mo GUI khi load OK; sync 6 ban JS + index.html ?v; kem cac fix bridge truoc (bugs 1-4, GUI restore)

app/core/native_render.py

@@ -39,7 +39,7 @@ def find_bridge_exe() -> str:
     return ""
 
 
-def normalize_audio_peak(audio, target_db=-3.0):
+def normalize_audio_peak(audio, target_db=0.0):
     """Scale audio (numpy array, peak) về target_db nếu vượt; giữ nguyên nếu dưới.
 
     Chống clip do note MIDI chồng (polyphony) — spec midi_polyphony_loudness §II:
@@ -57,7 +57,7 @@ def normalize_audio_peak(audio, target_db=-3.0):
     return audio
 
 
-def normalize_peak_file(path, target_db=-3.0):
+def normalize_peak_file(path, target_db=0.0):
     """Post-render WAV: scan peak, vượt target_db → scale toàn file (giữ format)."""
     try:
         info = sf.info(path)