AI models shared registry + Code cleanup + Better async handling + Some fixes, etc

crates/jarvis-core/src/models/structs.rs

@@ -0,0 +1,38 @@
+use std::path::PathBuf;
+use serde::{Serialize, Deserialize};
+
+// tasks that components can request a backend for
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum Task {
+    Intent,
+    Slots,
+    Vad,
+    NoiseSuppression,
+    Stt,
+}
+
+// metadata about a model, parsed from model.toml on disk
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ModelDef {
+    pub id: String,
+    pub name: String,
+    pub tasks: Vec<Task>,
+
+    #[serde(default)]
+    pub description: String,
+
+    // set at runtime after scanning the folder
+    #[serde(skip)]
+    pub path: PathBuf,
+}
+
+// a selectable option for a task (shown in UI / stored in settings)
+#[derive(Debug, Clone, Serialize)]
+pub struct BackendOption {
+    pub id: String,
+    pub name: String,
+    // if Some, this option uses a model from the registry.
+    // if None, it's a code-only backend (like energy VAD) or disabled.
+    pub model_id: Option<String>,
+}