Restore features lost during main merge and fix workspace setup flow

Restores all features dropped when merging main into dev:
- Keyboard shortcuts (send, dictation-confirm) with full e2e chain
- Feature toggles (plan/fast mode) in agent status bar
- Sidebar kebab menu (Remove Project) on project rows
- Combined model selector (sticky header, sizing, favorites sort, search)
- Question form Enter key submit with guard
- Input focus restoration (composer + AgentStatusBar onDropdownClose)
- Draft-agent feature toggles and focus restoration
- Provider diagnostics UI (settings section, diagnostic sheet, status badge)
- Provider diagnostics server (snapshot manager, diagnostic utils, RPC)

Fixes dev-branch regressions:
- New workspace button now opens composer in setup dialog via beginWorkspaceSetup
- Setup tab auto-opens when workspace setup is running

packages/server/src/client/daemon-client.ts

@@ -42,6 +42,9 @@ import type {
   ListProviderModelsResponseMessage,
   ListProviderModesResponseMessage,
   ListAvailableProvidersResponse,
+  GetProvidersSnapshotResponseMessage,
+  RefreshProvidersSnapshotResponseMessage,
+  ProviderDiagnosticResponseMessage,
   ListTerminalsResponse,
   CreateTerminalResponse,
   SubscribeTerminalResponse,
@@ -152,6 +155,10 @@ export type DaemonEvent =
       requestId: string;
       resolution: AgentPermissionResponse;
     }
+  | {
+      type: "providers_snapshot_update";
+      payload: Extract<SessionOutboundMessage, { type: "providers_snapshot_update" }>["payload"];
+    }
   | { type: "error"; message: string };
 
 export type DaemonEventHandler = (event: DaemonEvent) => void;
@@ -228,6 +235,9 @@ type ListProviderFeaturesPayload = ListProviderFeaturesResponseMessage["payload"
 type ListProviderModelsPayload = ListProviderModelsResponseMessage["payload"];
 type ListProviderModesPayload = ListProviderModesResponseMessage["payload"];
 type ListAvailableProvidersPayload = ListAvailableProvidersResponse["payload"];
+type GetProvidersSnapshotPayload = GetProvidersSnapshotResponseMessage["payload"];
+type RefreshProvidersSnapshotPayload = RefreshProvidersSnapshotResponseMessage["payload"];
+type ProviderDiagnosticPayload = ProviderDiagnosticResponseMessage["payload"];
 type ListCommandsPayload = ListCommandsResponse["payload"];
 type ListCommandsDraftConfig = Pick<
   AgentSessionConfig,
@@ -2574,6 +2584,51 @@ export class DaemonClient {
     });
   }
 
+  async getProvidersSnapshot(options?: {
+    cwd?: string;
+    requestId?: string;
+  }): Promise<GetProvidersSnapshotPayload> {
+    return this.sendCorrelatedSessionRequest({
+      requestId: options?.requestId,
+      message: {
+        type: "get_providers_snapshot_request",
+        cwd: options?.cwd,
+      },
+      responseType: "get_providers_snapshot_response",
+      timeout: 10000,
+    });
+  }
+
+  async refreshProvidersSnapshot(options?: {
+    cwd?: string;
+    requestId?: string;
+  }): Promise<RefreshProvidersSnapshotPayload> {
+    return this.sendCorrelatedSessionRequest({
+      requestId: options?.requestId,
+      message: {
+        type: "refresh_providers_snapshot_request",
+        cwd: options?.cwd,
+      },
+      responseType: "refresh_providers_snapshot_response",
+      timeout: 5000,
+    });
+  }
+
+  async getProviderDiagnostic(
+    provider: AgentProvider,
+    options?: { requestId?: string },
+  ): Promise<ProviderDiagnosticPayload> {
+    return this.sendCorrelatedSessionRequest({
+      requestId: options?.requestId,
+      message: {
+        type: "provider_diagnostic_request",
+        provider,
+      },
+      responseType: "provider_diagnostic_response",
+      timeout: 30000,
+    });
+  }
+
   async listCommands(agentId: string, requestId?: string): Promise<ListCommandsPayload>;
   async listCommands(agentId: string, options?: ListCommandsOptions): Promise<ListCommandsPayload>;
   async listCommands(
@@ -3668,6 +3723,11 @@ export class DaemonClient {
           requestId: msg.payload.requestId,
           resolution: msg.payload.resolution,
         };
+      case "providers_snapshot_update":
+        return {
+          type: "providers_snapshot_update",
+          payload: msg.payload,
+        };
       default:
         return null;
     }