Add repeater region discover

frontend/src/test/settingsModal.test.tsx

@@ -12,6 +12,7 @@ import type {
   RadioConfigUpdate,
   RadioDiscoveryResponse,
   RadioDiscoveryTarget,
+  RadioRegionDiscoveryResponse,
   StatisticsResponse,
 } from '../types';
 import type { SettingsSection } from '../components/settings/settingsConstants';
@@ -93,6 +94,7 @@ function renderModal(overrides?: {
   meshDiscovery?: RadioDiscoveryResponse | null;
   meshDiscoveryLoadingTarget?: RadioDiscoveryTarget | null;
   onDiscoverMesh?: (target: RadioDiscoveryTarget) => Promise<void>;
+  regionDiscovery?: RadioRegionDiscoveryResponse | null;
   contacts?: Contact[];
   trackedTelemetryRepeaters?: string[];
   open?: boolean;
@@ -113,6 +115,7 @@ function renderModal(overrides?: {
   const onReconnect = overrides?.onReconnect ?? vi.fn(async () => {});
   const onAdvertise = overrides?.onAdvertise ?? vi.fn(async (_mode: RadioAdvertMode) => {});
   const onDiscoverMesh = overrides?.onDiscoverMesh ?? vi.fn(async () => {});
+  const onDiscoverRegions = vi.fn(async () => {});
 
   const commonProps = {
     open: overrides?.open ?? true,
@@ -131,6 +134,9 @@ function renderModal(overrides?: {
     meshDiscovery: overrides?.meshDiscovery ?? null,
     meshDiscoveryLoadingTarget: overrides?.meshDiscoveryLoadingTarget ?? null,
     onDiscoverMesh,
+    regionDiscovery: overrides?.regionDiscovery ?? null,
+    regionDiscoveryLoading: false,
+    onDiscoverRegions,
     onHealthRefresh: vi.fn(async () => {}),
     onRefreshAppSettings,
     contacts: overrides?.contacts,
@@ -158,6 +164,7 @@ function renderModal(overrides?: {
     onReconnect,
     onAdvertise,
     onDiscoverMesh,
+    onDiscoverRegions,
     view,
   };
 }
@@ -335,6 +342,67 @@ describe('SettingsModal', () => {
     expect(screen.getByText('8s listen window')).toBeInTheDocument();
   });
 
+  it('discovers regions using repeaters from the last mesh sweep', async () => {
+    const { onDiscoverRegions } = renderModal({
+      meshDiscovery: {
+        target: 'all',
+        duration_seconds: 8,
+        results: [
+          {
+            public_key: '11'.repeat(32),
+            name: 'RPT-A',
+            node_type: 'repeater',
+            heard_count: 1,
+            local_snr: 5,
+            local_rssi: -100,
+            remote_snr: 3,
+          },
+          {
+            public_key: '22'.repeat(32),
+            name: 'Sensor',
+            node_type: 'sensor',
+            heard_count: 1,
+            local_snr: 5,
+            local_rssi: -100,
+            remote_snr: 3,
+          },
+        ],
+      },
+    });
+    openRadioSection();
+
+    fireEvent.click(screen.getByRole('button', { name: 'Discover Regions' }));
+
+    // Only the repeater's key is passed, not the sensor's.
+    await waitFor(() => {
+      expect(onDiscoverRegions).toHaveBeenCalledWith(['11'.repeat(32)]);
+    });
+  });
+
+  it('adds discovered regions to the known-regions field', () => {
+    renderModal({
+      regionDiscovery: {
+        repeaters_queried: 2,
+        repeaters_answered: 2,
+        regions: ['nl-gr', 'de-by'],
+        results: [],
+      },
+    });
+    openRadioSection();
+
+    expect(screen.getByText('2/2 repeaters answered — 2 regions found')).toBeInTheDocument();
+
+    const knownRegions = screen.getByLabelText(
+      'Known Regions (for decoding)'
+    ) as HTMLTextAreaElement;
+    fireEvent.change(knownRegions, { target: { value: 'nl-gr' } });
+
+    fireEvent.click(screen.getByRole('button', { name: 'Add to Known Regions' }));
+
+    // Existing 'nl-gr' preserved, only the new 'de-by' appended.
+    expect(knownRegions.value).toBe('nl-gr\nde-by');
+  });
+
   it('saves advert location source through radio config save', async () => {
     const { onSave } = renderModal();
     openRadioSection();