feat(agent): support Responses steering and project-aware tools

Use the dedicated TJWATER_AGENT_URL and Responses stream protocol. Keep running
turns active while users steer or queue follow-ups and edit pending delivery.
Refresh the model catalog before generation and preserve approval mode selection.

Integrate scoped investigation messaging/presentation, geographic place selection,
current Agent composer styles and supporting workbench contracts.

Validation: 77 focused Vitest checks, 21 browser cases, lint, typecheck and
production build. Preserve direct Server/Agent routing and project authentication.

src/features/agent/frontend-action/index.test.ts

@@ -13,7 +13,7 @@ beforeEach(() => {
 });
 
 describe("SCADA frontend actions", () => {
-  it("accepts only the two registered SCADA action names", () => {
+  it("accepts registered view actions and rejects unknown action names", () => {
     expect(parseFrontendActionRegistry({
       schema_version: "frontend-action-registry@1",
       actions: [
@@ -23,9 +23,10 @@ describe("SCADA frontend actions", () => {
       ]
     })?.actions.map((action) => action.id)).toEqual([
       "render_scada_analysis",
-      "clear_scada_analysis"
+      "clear_scada_analysis",
+      "zoom_to_map"
     ]);
-    expect(parseFrontendActionRequest(createRequest("zoom_to_map"))).toBeNull();
+    expect(parseFrontendActionRequest(createRequest("execute_script"))).toBeNull();
     expect(parseFrontendActionRequest(createRequest("render_scada_analysis"))).not.toBeNull();
   });