fix(exit): taskkill rieng tung process — kill het plugin_host/fx_vst_bridge khi thoat app (truoc day /IM gop chi chay lenh dau); CREATE_NO_WINDOW cho moi subprocess engine (het terminal chớp chớp)

app/api/v1/files.py

@@ -74,6 +74,7 @@ def _save_file_native_engine(default_name: str, filter_name: str, filter_ext: st
             r = subprocess.run(
                 ["powershell", "-NoProfile", "-STA", "-Command", ps],
                 capture_output=True, text=True, timeout=SAVE_DIALOG_TIMEOUT,
+                creationflags=subprocess.CREATE_NO_WINDOW,
             )
             return r.stdout.strip() or None
         except Exception:

app/api/v1/plugins.py

@@ -419,6 +419,7 @@ def _pick_dir_native_engine() -> Optional[str]:
             r = subprocess.run(
                 ["powershell", "-NoProfile", "-STA", "-Command", ps],
                 capture_output=True, text=True, timeout=PICK_DIR_TIMEOUT,
+                creationflags=subprocess.CREATE_NO_WINDOW,
             )
             return r.stdout.strip() or None
         except Exception:
@@ -798,7 +799,8 @@ async def open_in_carla(req: OpenInCarlaRequest, current_user: dict = Depends(ge
         cmd.append(carxs_path)
     try:
         cwd = os.path.dirname(carla) or None
-        proc = subprocess.Popen(cmd, cwd=cwd, close_fds=os.name != "nt")
+        proc = subprocess.Popen(cmd, cwd=cwd, close_fds=os.name != "nt",
+                                creationflags=subprocess.CREATE_NO_WINDOW if os.name == "nt" else 0)
         _register_carla_process(proc)
         return {
             "success": True,
@@ -1778,7 +1780,8 @@ def _running_sonicforge_pids() -> list:
         out = subprocess.run(
             ["powershell", "-NoProfile", "-Command",
              "Get-Process sonicforge-daw,daw_engine -ErrorAction SilentlyContinue | Select-Object -ExpandProperty Id"],
-            capture_output=True, text=True, timeout=10).stdout
+            capture_output=True, text=True, timeout=10,
+            creationflags=subprocess.CREATE_NO_WINDOW).stdout
         for line in out.splitlines():
             line = line.strip()
             if line.isdigit():

app/core/native_render.py

@@ -176,7 +176,8 @@ def render_offline(instrument_id, notes, bpm, sample_rate, preset_id=None,
         with open(job_path, "w", encoding="utf-8") as fh:
             json.dump(job, fh)
         r = subprocess.run([exe, "--render", job_path, "--out", out_path],
-                           capture_output=True, text=True, timeout=120)
+                           capture_output=True, text=True, timeout=120,
+                           creationflags=subprocess.CREATE_NO_WINDOW if os.name == "nt" else 0)
         log = ((r.stdout or "") + (r.stderr or "")).strip()
         if r.returncode != 0 or not os.path.isfile(out_path):
             if os.path.exists(out_path):
@@ -259,7 +260,8 @@ def render_fx_chain(input_wav, fx_chain, sample_rate, out_path=None) -> str:
         with open(job_path, "w", encoding="utf-8") as fh:
             json.dump(job, fh)
         r = subprocess.run([exe, "--render-fx", job_path, "--in", input_wav, "--out", out],
-                           capture_output=True, text=True, timeout=120)
+                           capture_output=True, text=True, timeout=120,
+                           creationflags=subprocess.CREATE_NO_WINDOW if os.name == "nt" else 0)
         log = ((r.stdout or "") + (r.stderr or "")).strip()
         if r.returncode != 0 or not os.path.isfile(out):
             if os.path.exists(out):

app/core/soundfont_converter.py

@@ -78,7 +78,8 @@ class SoundFontConverter:
 
     def _check_ffmpeg_ogg(self):
         try:
-            r = subprocess.run(["ffmpeg", "-encoders"], capture_output=True, text=True, timeout=5)
+            r = subprocess.run(["ffmpeg", "-encoders"], capture_output=True, text=True, timeout=5,
+                        creationflags=subprocess.CREATE_NO_WINDOW if os.name == "nt" else 0)
             return "libvorbis" in r.stdout
         except Exception:
             return False
@@ -98,7 +99,8 @@ class SoundFontConverter:
                 "ffmpeg", "-y", "-i", tmp_wav,
                 "-c:a", "libvorbis", "-q:a", "3",
                 "-f", "ogg", tmp_ogg
-            ], capture_output=True, timeout=600, check=True)
+            ], capture_output=True, timeout=600, check=True,
+               creationflags=subprocess.CREATE_NO_WINDOW if os.name == "nt" else 0)
             with open(tmp_ogg, "rb") as fo:
                 return fo.read()
         except Exception as e:
@@ -320,7 +322,8 @@ class SoundFontConverter:
     def _find_sf3_converter():
         for exe in ["fluidsynth", "mscore"]:
             try:
-                subprocess.run([exe, "--help"], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, timeout=2.0)
+                subprocess.run([exe, "--help"], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, timeout=2.0,
+                    creationflags=subprocess.CREATE_NO_WINDOW if os.name == "nt" else 0)
                 return exe
             except (FileNotFoundError, subprocess.TimeoutExpired):
                 continue
@@ -353,7 +356,8 @@ class SoundFontConverter:
 
             if converter == "mscore":
                 cmd = ["mscore", "-o", sf3_path, sf2_path]
-                result = subprocess.run(cmd, capture_output=True, text=True, timeout=600)
+                result = subprocess.run(cmd, capture_output=True, text=True, timeout=600,
+                                       creationflags=subprocess.CREATE_NO_WINDOW if os.name == "nt" else 0)
                 if result.returncode == 0 and os.path.exists(sf3_path):
                     logger.info(f"Created SF3 via mscore: {sf3_path} ({os.path.getsize(sf3_path)/1024/1024:.1f}MB)")
                     return sf3_path
@@ -524,7 +528,8 @@ class SoundFontConverter:
                 fo.write(ogg)
             r = subprocess.run(
                 ["ffmpeg", "-y", "-v", "error", "-i", tmp_ogg, "-f", "s16le", "-ac", "1", tmp_pcm],
-                capture_output=True, timeout=600)
+                capture_output=True, timeout=600,
+                creationflags=subprocess.CREATE_NO_WINDOW if os.name == "nt" else 0)
             if r.returncode != 0:
                 logger.warning(f"OGG decode failed: {r.stderr.decode(errors='replace')[:120]}")
                 return b""

app/core/vst_engine.py

@@ -582,6 +582,7 @@ class PluginManager:
             for d in dirs:
                 try:
                     r = subprocess.run([exe, "--scan", d], capture_output=True,
+                      creationflags=subprocess.CREATE_NO_WINDOW if os.name == "nt" else 0,
                                        text=True, timeout=300)
                 except Exception:
                     continue

src-tauri/src/lib.rs

@@ -737,13 +737,15 @@ pub fn run() {
                     // dot ngot (watchdog graceful shutdown treo vi LAN client).
                     // Task Manager dong app -> Destroyed khong chay -> engine tu
                     // thoat nho watchdog; o day dong app binh thuong -> quet het.
-                    let _ = std::process::Command::new("taskkill")
-                        .args(["/IM", "daw_engine.exe", "/T", "/F"])
-                        .status();
-                    let _ = std::process::Command::new("taskkill")
-                        .args(["/IM", "daw_vst_bridge.exe", "/T", "/F",
-                        "/IM", "fx_vst_bridge.exe", "/T", "/F"])
-                        .status();
+                    // taskkill chi nhan MOT /IM moi lan goi — goi rieng cho tung
+                    // process, khong gop /IM ... /IM (truoc day chi cai dau chay,
+                    // fx_vst_bridge/plugin_host song sot thanh orphan).
+                    for im in ["daw_engine.exe", "daw_vst_bridge.exe",
+                               "fx_vst_bridge.exe", "plugin_host.exe"] {
+                        let _ = std::process::Command::new("taskkill")
+                            .args(["/IM", im, "/T", "/F"])
+                            .status();
+                    }
                     window.app_handle().exit(0);
                 }
             }