fix(arch): unify TS/Rust types + classroom persistence registration + approval audit

- M11-03: Register ClassroomPersistence via Tauri .setup() hook with
  in-memory fallback. Previously missing — classroom commands would crash at runtime.
- M3-02: Document BrowserHand as schema validator + TypeScript delegation
  passthrough (dual-path architecture explicitly documented).
- M4-04: Add defense-in-depth audit logging in execute_hand() and
  execute_hand_with_source() when needs_approval hands bypass approval gate.
- TYPE-01: Add #[serde(rename_all = "camelCase")] to Rust AgentInfo.
  Add missing fields to TS AgentInfo (messageCount, createdAt, updatedAt).
  Fix KernelStatus TS interface to match Rust KernelStatusResponse
  (baseUrl/model instead of defaultProvider/defaultModel).
- SEC2-P1-01: Document EXTRACTION_DRIVER OnceCell as legacy path;
  Kernel struct field is the active path.
- TriggerSource: Add #[derive(PartialEq)] for approval audit comparisons.

crates/zclaw-types/src/agent.rs

@@ -155,6 +155,7 @@ impl std::fmt::Display for AgentState {
 
 /// Agent information for display
 #[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
 pub struct AgentInfo {
     pub id: AgentId,
     pub name: String,

crates/zclaw-types/src/hand_run.rs

@@ -81,7 +81,7 @@ impl std::str::FromStr for HandRunStatus {
 }
 
 /// What triggered the hand execution
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 #[serde(rename_all = "snake_case")]
 pub enum TriggerSource {
     /// Manual invocation from user