feat(setup): "Test ANPR" probe on ANPR-enabled cameras

Adds a bottom-of-modal "Test ANPR" button (shown only when a camera's
Plate recognition opt-in is checked) that captures a live snapshot off
the camera and runs it through the vision service, reporting the plate
read + confidence + elapsed time, or which stage failed.

- New POST /api/setup/test-anpr: builds the camera from the unsaved
  config (no DB write/device change, like /test), captures a snapshot,
  runs vision.analyze. Fail-soft like the runtime path (snapshot.ts):
  camera/vision failures are reported results, never a 500.
- Thread the existing VisionClient into setupRoutes; add an isCamera()
  type guard to @parking/devices.
- Web: testAnpr() client + AnprTestResult; button, hint, result line.
- i18n keys in sq + en (Catalog parity).

Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V

apps/web/src/SetupWizard.tsx

@@ -7,8 +7,10 @@ import {
   fetchBackendIps,
   fetchCatalog,
   fetchState,
+  testAnpr,
   testDevice,
   unassignDevice,
+  type AnprTestResult,
   type Assignment,
   type BackendIpCandidate,
   type Catalog,
@@ -352,6 +354,10 @@ function DeviceForm({
   const [tested, setTested] = useState<TestResult | null>(null);
   const [testing, setTesting] = useState(false);
   const [testError, setTestError] = useState<string | null>(null);
+  // ANPR probe (camera + anpr on): snapshot → vision analyze, reported below.
+  const [anprResult, setAnprResult] = useState<AnprTestResult | null>(null);
+  const [anprTesting, setAnprTesting] = useState(false);
+  const [anprError, setAnprError] = useState<string | null>(null);
   const [saving, setSaving] = useState(false);
   const [saveError, setSaveError] = useState<string | null>(null);
   const [found, setFound] = useState<DiscoveredDevice[] | null>(null);
@@ -442,6 +448,8 @@ function DeviceForm({
     setTested(null);
     setTestError(null);
     setSaveError(null);
+    setAnprResult(null);
+    setAnprError(null);
   }
 
   async function test() {
@@ -458,6 +466,23 @@ function DeviceForm({
     }
   }
 
+  // End-to-end ANPR probe: capture a frame off this camera and run the vision service
+  // on it, reporting plate + time (or the failure stage). Only meaningful for an
+  // ANPR-enabled camera; never blocks save.
+  async function testAnprNow() {
+    if (!selected) return;
+    setAnprTesting(true);
+    setAnprError(null);
+    setAnprResult(null);
+    try {
+      setAnprResult(await testAnpr(selected.id, mergedScalarConfig()));
+    } catch (e) {
+      setAnprError((e as Error).message);
+    } finally {
+      setAnprTesting(false);
+    }
+  }
+
   async function save() {
     if (!selected) return;
     // Bound devices must point at a controller relay (binding is optional in the
@@ -641,6 +666,40 @@ function DeviceForm({
             </div>
           )}
 
+          {/* CAMERA + ANPR on: a bottom-of-modal end-to-end probe — capture a frame and
+              run the vision service on it, reporting the plate read + how long it took. */}
+          {isCamera && anpr && (
+            <div className="mt-3 rounded-term border border-term-border bg-term-bg p-2">
+              <button type="button" className="btn btn-sm" onClick={testAnprNow} disabled={anprTesting}>
+                {anprTesting ? t("setup.anprTesting") : t("setup.testAnpr")}
+              </button>
+              <p className="hint mt-1">{t("setup.testAnprHint")}</p>
+
+              {anprError && <p className="mt-2 text-[12px] text-term-red">{t("setup.testFailed", { error: anprError })}</p>}
+              {anprResult &&
+                (anprResult.ok ? (
+                  <div className="mt-2 text-[12px] text-term-green">
+                    {t("setup.anprOk", {
+                      plate: anprResult.plate,
+                      confidence: Math.round(anprResult.confidence * 100),
+                      ms: anprResult.tookMs,
+                    })}
+                    {anprResult.lowConfidence && (
+                      <span className="ml-1 text-term-amber">{t("setup.anprLowConfidence")}</span>
+                    )}
+                  </div>
+                ) : (
+                  <div className="mt-2 text-[12px] text-term-amber">
+                    ⚠ {t(`setup.anprFail.${anprResult.reason}`, { defaultValue: anprResult.reason })}
+                    {anprResult.detail && <span className="text-term-muted"> — {anprResult.detail}</span>}
+                    {anprResult.tookMs != null && (
+                      <span className="text-term-muted"> ({t("setup.anprTookMs", { ms: anprResult.tookMs })})</span>
+                    )}
+                  </div>
+                ))}
+            </div>
+          )}
+
           {backendIps && backendIps.length > 0 && (
             <div className="mt-3">
               <div className="field max-w-md">