can change openrouter model in UI

orchestrator/src/client/App.tsx

@@ -4,11 +4,13 @@
 
 import React, { useCallback, useEffect, useState } from "react";
 import { toast } from "sonner";
+import { Route, Routes } from "react-router-dom";
 
 import { Toaster } from "@/components/ui/sonner";
 import type { Job, JobSource, JobStatus } from "../shared/types";
 import { Header, JobList, PipelineProgress, Stats } from "./components";
 import * as api from "./api";
+import { SettingsPage } from "./pages/SettingsPage";
 
 const DEFAULT_PIPELINE_SOURCES: JobSource[] = ["gradcracker", "indeed", "linkedin"];
 const PIPELINE_SOURCES_STORAGE_KEY = "jobops.pipeline.sources";
@@ -170,17 +172,25 @@ export const App: React.FC = () => {
         onPipelineSourcesChange={setPipelineSources}
       />
 
-      <main className="container mx-auto max-w-7xl space-y-6 px-4 py-6 pb-12">
-        <PipelineProgress isRunning={isPipelineRunning} />
-        <Stats stats={stats} />
-        <JobList
-          jobs={jobs}
-          onApply={handleApply}
-          onReject={handleReject}
-          onProcess={handleProcess}
-          processingJobId={processingJobId}
+      <Routes>
+        <Route
+          path="/"
+          element={
+            <main className="container mx-auto max-w-7xl space-y-6 px-4 py-6 pb-12">
+              <PipelineProgress isRunning={isPipelineRunning} />
+              <Stats stats={stats} />
+              <JobList
+                jobs={jobs}
+                onApply={handleApply}
+                onReject={handleReject}
+                onProcess={handleProcess}
+                processingJobId={processingJobId}
+              />
+            </main>
+          }
         />
-      </main>
+        <Route path="/settings" element={<SettingsPage />} />
+      </Routes>
 
       <Toaster position="bottom-right" richColors closeButton />
     </>

orchestrator/src/client/api/client.ts

@@ -8,7 +8,8 @@ import type {
   JobsListResponse, 
   PipelineStatusResponse,
   JobSource,
-  PipelineRun 
+  PipelineRun,
+  AppSettings,
 } from '../../shared/types';
 
 const API_BASE = '/api';
@@ -92,6 +93,18 @@ export async function runPipeline(config?: {
   });
 }
 
+// Settings API
+export async function getSettings(): Promise<AppSettings> {
+  return fetchApi<AppSettings>('/settings');
+}
+
+export async function updateSettings(update: { model?: string | null }): Promise<AppSettings> {
+  return fetchApi<AppSettings>('/settings', {
+    method: 'PATCH',
+    body: JSON.stringify(update),
+  });
+}
+
 // Database API
 export async function clearDatabase(): Promise<{
   message: string;

orchestrator/src/client/components/Header.tsx

@@ -3,7 +3,8 @@
  */
 
 import React from "react";
-import { ChevronDown, Loader2, Play, RefreshCcw, Rocket, Trash2 } from "lucide-react";
+import { ChevronDown, Loader2, Play, RefreshCcw, Rocket, Settings, Trash2 } from "lucide-react";
+import { Link } from "react-router-dom";
 
 import { Button } from "@/components/ui/button";
 import {
@@ -112,6 +113,13 @@ export const Header: React.FC<HeaderProps> = ({
             <span className="hidden sm:inline">Refresh</span>
           </Button>
 
+          <Button asChild variant="outline" size="sm">
+            <Link to="/settings">
+              <Settings className="h-4 w-4" />
+              <span className="hidden sm:inline">Settings</span>
+            </Link>
+          </Button>
+
           <Button
             size="sm"
             onClick={onRunPipeline}

orchestrator/src/client/main.tsx

@@ -1,10 +1,13 @@
 import React from 'react';
 import ReactDOM from 'react-dom/client';
+import { BrowserRouter } from 'react-router-dom';
 import { App } from './App';
 import '../index.css';
 
 ReactDOM.createRoot(document.getElementById('root')!).render(
   <React.StrictMode>
-    <App />
+    <BrowserRouter>
+      <App />
+    </BrowserRouter>
   </React.StrictMode>
 );

orchestrator/src/client/pages/SettingsPage.tsx

@@ -0,0 +1,140 @@
+/**
+ * Settings page.
+ */
+
+import React, { useEffect, useMemo, useState } from "react"
+import { toast } from "sonner"
+
+import { Button } from "@/components/ui/button"
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
+import { Input } from "@/components/ui/input"
+import { Separator } from "@/components/ui/separator"
+import type { AppSettings } from "../../shared/types"
+import * as api from "../api"
+
+export const SettingsPage: React.FC = () => {
+  const [settings, setSettings] = useState<AppSettings | null>(null)
+  const [modelDraft, setModelDraft] = useState("")
+  const [isSaving, setIsSaving] = useState(false)
+  const [isLoading, setIsLoading] = useState(true)
+
+  useEffect(() => {
+    let isMounted = true
+    setIsLoading(true)
+    api
+      .getSettings()
+      .then((data) => {
+        if (!isMounted) return
+        setSettings(data)
+        setModelDraft(data.overrideModel ?? "")
+      })
+      .catch((error) => {
+        const message = error instanceof Error ? error.message : "Failed to load settings"
+        toast.error(message)
+      })
+      .finally(() => {
+        if (!isMounted) return
+        setIsLoading(false)
+      })
+
+    return () => {
+      isMounted = false
+    }
+  }, [])
+
+  const effectiveModel = settings?.model ?? ""
+  const defaultModel = settings?.defaultModel ?? ""
+  const overrideModel = settings?.overrideModel
+
+  const canSave = useMemo(() => {
+    if (!settings) return false
+    const next = modelDraft.trim()
+    const current = (overrideModel ?? "").trim()
+    return next !== current
+  }, [modelDraft, overrideModel, settings])
+
+  const handleSave = async () => {
+    if (!settings) return
+    try {
+      setIsSaving(true)
+      const trimmed = modelDraft.trim()
+      const updated = await api.updateSettings({ model: trimmed.length > 0 ? trimmed : null })
+      setSettings(updated)
+      setModelDraft(updated.overrideModel ?? "")
+      toast.success("Settings saved")
+    } catch (error) {
+      const message = error instanceof Error ? error.message : "Failed to save settings"
+      toast.error(message)
+    } finally {
+      setIsSaving(false)
+    }
+  }
+
+  const handleReset = async () => {
+    try {
+      setIsSaving(true)
+      const updated = await api.updateSettings({ model: null })
+      setSettings(updated)
+      setModelDraft("")
+      toast.success("Reset to default")
+    } catch (error) {
+      const message = error instanceof Error ? error.message : "Failed to reset settings"
+      toast.error(message)
+    } finally {
+      setIsSaving(false)
+    }
+  }
+
+  return (
+    <main className="container mx-auto max-w-3xl space-y-6 px-4 py-6 pb-12">
+      <div className="space-y-1">
+        <h1 className="text-xl font-semibold tracking-tight">Settings</h1>
+        <p className="text-sm text-muted-foreground">Configure runtime behavior for this app.</p>
+      </div>
+
+      <Card>
+        <CardHeader>
+          <CardTitle className="text-base">Model</CardTitle>
+        </CardHeader>
+
+        <CardContent className="space-y-4">
+          <div className="space-y-2">
+            <div className="text-sm font-medium">Override model</div>
+            <Input
+              value={modelDraft}
+              onChange={(event) => setModelDraft(event.target.value)}
+              placeholder={defaultModel || "openai/gpt-4o-mini"}
+              disabled={isLoading || isSaving}
+            />
+            <div className="text-xs text-muted-foreground">
+              Leave blank to use the default from server env (`MODEL`).
+            </div>
+          </div>
+
+          <Separator />
+
+          <div className="grid gap-2 text-sm sm:grid-cols-2">
+            <div>
+              <div className="text-xs text-muted-foreground">Effective</div>
+              <div className="break-words font-mono text-xs">{effectiveModel || "—"}</div>
+            </div>
+            <div>
+              <div className="text-xs text-muted-foreground">Default (env)</div>
+              <div className="break-words font-mono text-xs">{defaultModel || "—"}</div>
+            </div>
+          </div>
+
+          <div className="flex flex-wrap gap-2">
+            <Button onClick={handleSave} disabled={isLoading || isSaving || !canSave}>
+              {isSaving ? "Saving..." : "Save"}
+            </Button>
+            <Button variant="outline" onClick={handleReset} disabled={isLoading || isSaving || !settings}>
+              Reset to default
+            </Button>
+          </div>
+        </CardContent>
+      </Card>
+    </main>
+  )
+}
+