fix: bridge crash/stall when opening native VST GUI while playing

- Fix A (USER32 crash): WM_CLOSE no longer destroys the native VST
  window from the main thread (plugin editor children live on the
  channel worker thread). WM_CLOSE -> hide + closeGUI on worker;
  WM_DESTROY erases registry. LOAD_INSTRUMENT close uses closeGUI +
  SW_HIDE, waits on hasAttachedView() instead of registry erase.
- Fix B: per-process SHM name SonicForge_DAW_IPC_{pid} so stale
  bridges from old builds can never attach to a new app's ring buffer.
- Fix C (stall): opening editor for a plugin whose other channel still
  has a live instance of the same DLL (Nexus) deadlocked the audio
  loop (reload+createView on worker while audio thread processed the
  other instance). Silence same-path channels via setReloading during
  reload/attach, restore afterwards; audio resumes.
- Rebuild bridge + update install/ portable package.

src-tauri/src/lib.rs

@@ -169,7 +169,7 @@ fn spawn_bridge(
             match app
                 .shell()
                 .command(&bridge_exe)
-                .env("SF_SHM_NAME", shm::SHM_NAME)
+                .env("SF_SHM_NAME", shm::shm_name())
                 .env("SF_PARENT_PID", std::process::id().to_string())
                 .env("SF_SAMPLE_RATE", sample_rate.to_string())
                 .env("SF_BLOCK_SIZE", "256")
@@ -342,7 +342,7 @@ pub fn run() {
             let shm_created = Shm::create();
             println!(
                 "SharedMemory {}: {}",
-                shm::SHM_NAME,
+                shm::shm_name(),
                 if shm_created.is_some() { "created" } else { "unavailable (non-windows or error)" }
             );
             app.manage(ShmState(Mutex::new(shm_created)));
@@ -588,7 +588,7 @@ fn open_vst_gui(app: AppHandle, plugin_id: String, channel: u8) -> Result<(), St
 #[derive(serde::Serialize)]
 struct BridgeStatus {
     connected: bool,
-    shm_name: &'static str,
+    shm_name: String,
     write_index: u32,
     block_timestamp: u64,
     shm_size_bytes: usize,
@@ -610,7 +610,7 @@ fn bridge_status(app: AppHandle) -> Result<BridgeStatus, String> {
     let status = match guard.as_ref() {
         Some(shm) => BridgeStatus {
             connected: true,
-            shm_name: shm::SHM_NAME,
+            shm_name: shm::shm_name(),
             write_index: shm.write_index(),
             block_timestamp: shm.block_timestamp(),
             shm_size_bytes: std::mem::size_of::<shm::SharedAudioBufferIPC>(),
@@ -623,7 +623,7 @@ fn bridge_status(app: AppHandle) -> Result<BridgeStatus, String> {
         },
         None => BridgeStatus {
             connected: false,
-            shm_name: shm::SHM_NAME,
+            shm_name: shm::shm_name(),
             write_index: 0,
             block_timestamp: 0,
             shm_size_bytes: 0,