feat(webui): add model settings runtime refresh

webui/src/lib/api.ts

@@ -1,4 +1,4 @@
-import type { ChatSummary } from "./types";
+import type { ChatSummary, SettingsPayload, SettingsUpdate } from "./types";
 
 export class ApiError extends Error {
   status: number;
@@ -104,3 +104,21 @@ export async function deleteSession(
   );
   return body.deleted;
 }
+
+export async function fetchSettings(
+  token: string,
+  base: string = "",
+): Promise<SettingsPayload> {
+  return request<SettingsPayload>(`${base}/api/settings`, token);
+}
+
+export async function updateSettings(
+  token: string,
+  update: SettingsUpdate,
+  base: string = "",
+): Promise<SettingsPayload> {
+  const query = new URLSearchParams();
+  if (update.model !== undefined) query.set("model", update.model);
+  if (update.provider !== undefined) query.set("provider", update.provider);
+  return request<SettingsPayload>(`${base}/api/settings/update?${query}`, token);
+}

webui/src/lib/types.ts

@@ -66,6 +66,28 @@ export interface BootstrapResponse {
   model_name?: string | null;
 }
 
+export interface SettingsPayload {
+  agent: {
+    model: string;
+    provider: string;
+    resolved_provider: string | null;
+    has_api_key: boolean;
+  };
+  providers: Array<{
+    name: string;
+    label: string;
+  }>;
+  runtime: {
+    config_path: string;
+  };
+  requires_restart: boolean;
+}
+
+export interface SettingsUpdate {
+  model?: string;
+  provider?: string;
+}
+
 export type ConnectionStatus =
   | "idle"
   | "connecting"