fix: pass config+config_path to WebServerDeps so audio profile persists to disk; add boot-time period/rate override loading from config.yaml

main.py

@@ -22,7 +22,7 @@ from typing import Optional
 import yaml
 
 # ── Subsystem imports ─────────────────────────────────────────────────────────
-from src.system.audio import AudioConfig, AudioSystem, JackAudioClient, _jack_is_running
+from src.system.audio import AudioConfig, AudioSystem, JackAudioClient, LATENCY_PROFILES, _jack_is_running
 from src.system.defaults import ensure_defaults_exist
 from src.dsp.pipeline import AudioPipeline
 from src.dsp.nam_engine_host import FastNAMHost
@@ -69,6 +69,7 @@ class PedalApp:
 
     def __init__(self, config_path: Path = DEFAULT_CONFIG_PATH) -> None:
         self._config = load_config(config_path)
+        self._config_path = config_path
 
         # ── Runtime state ──────────────────────────────────────────────
         self._running = False
@@ -116,9 +117,26 @@ class PedalApp:
             # ── 1. Audio config + system ──────────────────────────
             acfg = self._config["audio"]
             audio_mode = acfg.get("mode", "mono")
+
+            # Support custom period/rate overrides saved by the API
+            boot_profile = acfg.get("profile", "standard")
+            custom_period = acfg.get("period")
+            custom_rate = acfg.get("rate")
+            if custom_period is not None or custom_rate is not None:
+                if boot_profile in LATENCY_PROFILES:
+                    overridden = dict(LATENCY_PROFILES[boot_profile])
+                else:
+                    overridden = dict(LATENCY_PROFILES.get("stable", LATENCY_PROFILES["standard"]))
+                if custom_period is not None:
+                    overridden["period"] = custom_period
+                if custom_rate is not None:
+                    overridden["rate"] = custom_rate
+                LATENCY_PROFILES[f"{boot_profile}_boot"] = overridden
+                boot_profile = f"{boot_profile}_boot"
+
             self.audio_config = AudioConfig(
                 hat_type=acfg.get("hat_type", "audioinjector"),
-                profile=acfg.get("profile", "standard"),
+                profile=boot_profile,
                 mode=audio_mode,
                 input_device=acfg.get("input_device", "hw:0,0"),
                 output_device=acfg.get("output_device", "hw:0,0"),
@@ -251,6 +269,8 @@ class PedalApp:
                         ir_loader=self.ir_loader,
                         audio_system=self.audio_system,
                         jack_audio=self.jack_audio,
+                        config=self._config,
+                        config_path=self._config_path,
                     ),
                     host="0.0.0.0",
                     port=8080,