feat(import): selective GPX/KML element import and performance improvements

Add type-selector UI in the file import modal letting users choose which
GPX elements (waypoints, routes, tracks) or KML/KMZ elements (points,
paths) to import. KML LineString placemarks are now imported as path
places with route_geometry.

Performance improvements:
- Extract MemoPlaceRow with React.memo and contentVisibility:auto to cut
  unnecessary re-renders in PlacesSidebar
- Add weatherQueue to cap concurrent weather fetches at 3
- Replace sequential per-place deletes with a single bulkDelete API call
  (new DELETE /places/bulk endpoint + deletePlacesMany service)
- Memoize atlas/photo/weather service calls to avoid redundant requests
- Add multi-select mode to PlacesSidebar for bulk operations

Add large GPX/KML/KMZ fixtures for integration/perf testing and two
profiler analysis scripts under scripts/.

client/tests/integration/hooks/useRouteCalculation.test.ts

@@ -2,6 +2,7 @@ import { renderHook, act } from '@testing-library/react';
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 import { useRouteCalculation } from '../../../src/hooks/useRouteCalculation';
 import { useSettingsStore } from '../../../src/store/settingsStore';
+import { useTripStore } from '../../../src/store/tripStore';
 import { buildAssignment, buildPlace } from '../../helpers/factories';
 import type { TripStoreState } from '../../../src/store/tripStore';
 import type { RouteSegment } from '../../../src/types';
@@ -17,6 +18,9 @@ vi.mock('../../../src/components/Map/RouteCalculator', () => ({
 const { calculateSegments } = await import('../../../src/components/Map/RouteCalculator');
 
 function buildMockStore(assignments: Record<string, ReturnType<typeof buildAssignment>[]> = {}): Partial<TripStoreState> {
+  // Also populate the real Zustand store so updateRouteForDay (which reads from
+  // useTripStore.getState()) sees the same assignments as the hook's tripStore param.
+  useTripStore.setState({ assignments } as any);
   return { assignments } as Partial<TripStoreState>;
 }
 
@@ -35,6 +39,8 @@ describe('useRouteCalculation', () => {
     vi.clearAllMocks();
     // Default: route_calculation disabled
     useSettingsStore.setState({ settings: { route_calculation: false } as any });
+    // Reset trip store assignments so each test starts clean
+    useTripStore.setState({ assignments: {} } as any);
     (calculateSegments as ReturnType<typeof vi.fn>).mockResolvedValue(MOCK_SEGMENTS);
   });
 
@@ -266,7 +272,7 @@ describe('useRouteCalculation', () => {
     expect(result.current.setRouteInfo).toBeTypeOf('function');
   });
 
-  it('FE-HOOK-ROUTE-013: hook uses tripStoreRef — late store updates reflected correctly', async () => {
+  it('FE-HOOK-ROUTE-013: route recalculates when assignments change via store update', async () => {
     useSettingsStore.setState({ settings: { route_calculation: true } as any });
 
     const p1 = buildPlace({ lat: 10, lng: 10 });
@@ -287,10 +293,10 @@ describe('useRouteCalculation', () => {
       [p2.lat, p2.lng],
     ]);
 
-    // Now add a third place
+    // Now add a third place — update both the local store object and the Zustand store
     const p3 = buildPlace({ lat: 30, lng: 30 });
     const a3 = buildAssignment({ day_id: 5, order_index: 2, place: p3 });
-    storeData = buildMockStore({ '5': [a1, a2, a3] });
+    storeData = buildMockStore({ '5': [a1, a2, a3] }); // also calls useTripStore.setState
 
     await act(async () => {
       rerender();