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/workbench/components/toolbar-panel.tsx

@@ -46,8 +46,10 @@ import {
   type WorkbenchMeasureUnit
 } from "../hooks/use-workbench-measurement";
 import { waterNetworkToolbarItems } from "../map/toolbar-config";
+import type { WorkbenchGeocoding } from "../hooks/use-workbench-geocoding";
+import { GeocodingPanel } from "./geocoding-panel";
 
-export type ToolbarToolId = "layers" | "measure" | "analysis" | "annotation" | "more";
+export type ToolbarToolId = "geocoding" | "layers" | "measure" | "analysis" | "annotation" | "more";
 export type ExportViewPreset = "current" | "4k";
 
 type MeasureModeOption = {
@@ -95,6 +97,7 @@ const DRAW_TOOL_OPTIONS: Array<{
 ];
 
 export type ToolbarPanelProps = {
+  geocoding: WorkbenchGeocoding;
   activeToolId: ToolbarToolId | null;
   activeMeasureModeId: WorkbenchMeasureMode;
   activeMeasureUnitId: WorkbenchMeasureUnit;
@@ -136,6 +139,7 @@ export type ToolbarPanelProps = {
 };
 
 export function ToolbarPanel({
+  geocoding,
   activeToolId,
   activeMeasureModeId,
   activeMeasureUnitId,
@@ -225,6 +229,19 @@ export function ToolbarPanel({
   const activeTool = waterNetworkToolbarItems.find((item) => item.id === renderedToolId);
   const Icon = activeTool?.icon ?? Layers3;
 
+  if (renderedToolId === "geocoding") {
+    return (
+      <MapControlPanel
+        key="geocoding" title="地址定位" description="奉贤区 · 天地图地名搜索" icon={Icon}
+        widthClassName={`${panelWidthClassName ?? "w-[324px] max-h-[calc(100dvh-13.25rem)]"} flex flex-col overflow-hidden`}
+        contentClassName="flex min-h-0 flex-1 flex-col"
+        visible={panelVisible}
+      >
+        <GeocodingPanel geocoding={geocoding} />
+      </MapControlPanel>
+    );
+  }
+
   if (renderedToolId === "layers") {
     return (
       <MapControlPanel