Reload daemon configuration without restarting (#3365)

* feat(daemon): reload configuration without restarting

Keep config validation, reloadability classification, override handling, and atomic runtime application inside the daemon so local and remote clients share one authoritative workflow.

* fix(daemon): preserve reload resource ownership

Keep every materialized provider client under daemon-lifetime ownership and classify speech overrides from resolved providers. Restore the complete WebSocket config-store test contract exposed by CI.

packages/client/src/daemon-client.ts

@@ -84,6 +84,7 @@ import type {
   ProviderUsageListResponseMessage,
   DaemonGetStatusResponse,
   DaemonGetPairingOfferResponse,
+  DaemonConfigReloadResponse,
   DiagnosticsResponse,
   AgentRewindResponseMessage,
   ListTerminalsResponse,
@@ -4552,6 +4553,14 @@ export class DaemonClient {
     });
   }
 
+  async reloadDaemonConfig(requestId?: string): Promise<DaemonConfigReloadResponse["payload"]> {
+    this.requireDaemonConfigReloadSupport();
+    return this.sendNamespacedCorrelatedSessionRequest({
+      requestId,
+      message: { type: "daemon.config.reload.request" },
+    });
+  }
+
   async connectHub(hubUrl: string, token: string, requestId?: string) {
     this.requireHubRelationshipSupport();
     return this.sendCorrelatedSessionRequest({
@@ -5333,6 +5342,13 @@ export class DaemonClient {
     }
   }
 
+  private requireDaemonConfigReloadSupport(): void {
+    // COMPAT(daemonConfigReload): added in v0.4.0, remove gate after 2027-02-14.
+    if (this.lastServerInfoMessage?.features?.daemonConfigReload !== true) {
+      throw new Error("Update the host to reload daemon configuration.");
+    }
+  }
+
   private resolveTransportUrlForAttempt(): string {
     return this.config.url;
   }