fix: multiple bug fixes found during comprehensive test plan sweep

- Fix #5: Preset state lost on service restart — call restore_state()
  in PresetManager.__init__() so last active preset is tracked after boot
- Fix #14: Block bypass/toggle WS sync — add WebSocket connection
  in SPA with block_toggled handler that calls loadState()
- Fix #15: IR file naming — add display_name property to IRFile
  dataclass that strips common IR prefixes/suffixes
- Fix: block_id regeneration on every preset load — pass block_id
  from stored JSON data to FXBlock constructor in _preset_from_dict
  (both preset chain and snapshot chain)

src/dsp/ir_loader.py

@@ -43,6 +43,54 @@ class IRFile:
     length_ms: float
     channels: int = 1
 
+    @property
+    def display_name(self) -> str:
+        """Return a clean human-readable name by stripping common IR prefixes/suffixes.
+
+        Strips leading/trailing markers commonly found in IR filenames
+        (e.g. ``IR_Marshall_1960A.wav`` → ``Marshall 1960A``,
+        ``cab_Vox_AC30_48k.wav`` → ``Vox AC30``).
+        """
+        name = self.name
+
+        # Common IR prefixes (case-insensitive)
+        _prefixes = [
+            "IR_", "ir_", "IR-", "ir-",
+            "Impulse_Response_", "impulse_response_",
+            "Impulse-Response-", "impulse-response-",
+            "Cab_", "cab_", "Cab-", "cab-",
+        ]
+
+        # Common IR suffixes (case-insensitive)
+        _suffixes = [
+            "_IR", "_ir", "-IR", "-ir",
+            "_Impulse", "_impulse", "-Impulse", "-impulse",
+            "_Cab", "_cab", "-Cab", "-cab",
+            "_Stereo", "_stereo", "-Stereo", "-stereo",
+            "_Mono", "_mono", "-Mono", "-mono",
+            "_48k", "_48K", "-48k", "-48K",
+            "_44100", "-44100",
+            "_48kHz", "-48kHz",
+            "_16bit", "_24bit", "-16bit", "-24bit",
+            "_LD", "_SD", "-LD", "-SD",
+        ]
+
+        for prefix in _prefixes:
+            if name.lower().startswith(prefix.lower()):
+                name = name[len(prefix):]
+                break
+
+        for suffix in _suffixes:
+            if name.lower().endswith(suffix.lower()):
+                name = name[:-len(suffix)]
+                break
+
+        # Replace separators with spaces and clean up
+        name = name.replace("_", " ").replace("-", " ")
+        name = " ".join(name.split()).strip()
+
+        return name if name else self.name
+
 
 def _next_pow2(n: int) -> int:
     """Return the smallest power of 2 >= n."""

src/presets/manager.py

@@ -104,6 +104,7 @@ def _preset_from_dict(data: dict) -> Preset:
                 params=dict(block_data.get("params", {})),
                 nam_model_path=block_data.get("nam_model_path", ""),
                 ir_file_path=block_data.get("ir_file_path", ""),
+                block_id=block_data.get("block_id", ""),
             )
         )
 
@@ -128,6 +129,7 @@ def _preset_from_dict(data: dict) -> Preset:
                     params=dict(bd.get("params", {})),
                     nam_model_path=bd.get("nam_model_path", ""),
                     ir_file_path=bd.get("ir_file_path", ""),
+                    block_id=bd.get("block_id", ""),
                 )
             )
         snapshots[int(slot_str)] = Snapshot(
@@ -191,6 +193,10 @@ class PresetManager:
         # Migrate legacy flat presets → gtr channel on first boot
         self._migrate_legacy_presets()
 
+        # Restore last active preset after boot so the pedal comes back
+        # to the same (channel, bank, program) it was on before shutdown.
+        self.restore_state()
+
         logger.info("PresetManager root: %s (channel=%s)", self._dir, self._current_channel.value)
 
     # ── Public navigation API ───────────────────────────────────────────────

src/web/ui-v2-dist/index.html

@@ -945,6 +945,22 @@ async function pollTuner(){
 function startPolling(){stopPolling();loadState();pollTimer=setInterval(loadState,2000);}
 function stopPolling(){if(pollTimer){clearInterval(pollTimer);pollTimer=null;}}
 
+// ═══ WebSocket — real-time updates ═══
+let ws=null;
+function setupWebSocket(){
+  if(ws)try{ws.close()}catch(e){}
+  const proto=location.protocol==='https:'?'wss:':'ws:';
+  ws=new WebSocket(proto+'//'+location.host+'/ws');
+  ws.onmessage=(ev)=>{
+    try{
+      const msg=JSON.parse(ev.data);
+      if(msg.type==='block_toggled'){loadState();}
+    }catch(e){}
+  };
+  ws.onclose=()=>{setTimeout(setupWebSocket,3000);};
+  ws.onerror=()=>{};
+}
+
 // ═══ Init! ═══
 function init(){
   // Restore saved channel
@@ -1243,8 +1259,9 @@ function init(){
   document.getElementById('dlSearchBtn').onclick=doDlSearch;
   document.getElementById('dlSearch').onkeydown=(e)=>{if(e.key==='Enter')doDlSearch();};
 
-  // Start polling
+  // Start polling + WebSocket
   startPolling();
+  setupWebSocket();
   loadPresets();
   loadSnapshots();
 }