feat(web): add React Query, dark mode toggle, and error retry UX

- Install @tanstack/react-query with exponential backoff retry config
- Create QueryClientProvider and custom hooks for listings, analytics,
  payments, and subscription API calls
- Migrate 5 dashboard pages from useState/useEffect to React Query hooks
- Add dark mode CSS variables and ThemeProvider with localStorage persistence
- Add theme toggle button in dashboard header (sun/moon icon)
- Enhance error boundaries with auto-retry, retry count, and loading state

Co-Authored-By: Paperclip <noreply@paperclip.ing>

pnpm-lock.yaml

@@ -253,6 +253,9 @@ importers:
       '@sentry/nextjs':
         specifier: ^10.47.0
         version: 10.47.0(@opentelemetry/context-async-hooks@2.6.1(@opentelemetry/api@1.9.1))(@opentelemetry/core@2.6.1(@opentelemetry/api@1.9.1))(@opentelemetry/sdk-trace-base@2.6.1(@opentelemetry/api@1.9.1))(next@14.2.35(@babel/core@7.29.0)(@opentelemetry/api@1.9.1)(@playwright/test@1.59.1)(react-dom@18.3.1(react@18.3.1))(react@18.3.1))(react@18.3.1)(webpack@5.105.4)
+      '@tanstack/react-query':
+        specifier: ^5.96.2
+        version: 5.96.2(react@18.3.1)
       class-variance-authority:
         specifier: ^0.7.1
         version: 0.7.1
@@ -2424,6 +2427,14 @@ packages:
   '@swc/helpers@0.5.5':
     resolution: {integrity: sha512-KGYxvIOXcceOAbEk4bi/dVLEK9z8sZ0uBB3Il5b1rhfClSpcX0yfRO0KmTkqR2cnQDymwLB+25ZyMzICg/cm/A==}
 
+  '@tanstack/query-core@5.96.2':
+    resolution: {integrity: sha512-hzI6cTVh4KNRk8UtoIBS7Lv9g6BnJPXvBKsvYH1aGWvv0347jT3BnSvztOE+kD76XGvZnRC/t6qdW1CaIfwCeA==}
+
+  '@tanstack/react-query@5.96.2':
+    resolution: {integrity: sha512-sYyzzJT4G0g02azzJ8o55VFFV31XvFpdUpG+unxS0vSaYsJnSPKGoI6WdPwUucJL1wpgGfwfmntNX/Ub1uOViA==}
+    peerDependencies:
+      react: ^18 || ^19
+
   '@testing-library/dom@10.4.1':
     resolution: {integrity: sha512-o4PXJQidqJl82ckFaXUeoAW+XysPLauYI43Abki5hABd853iMhitooc6znOnczgbTYmEP6U6/y1ZyKAIsvMKGg==}
     engines: {node: '>=18'}
@@ -8794,6 +8805,13 @@ snapshots:
       '@swc/counter': 0.1.3
       tslib: 2.8.1
 
+  '@tanstack/query-core@5.96.2': {}
+
+  '@tanstack/react-query@5.96.2(react@18.3.1)':
+    dependencies:
+      '@tanstack/query-core': 5.96.2
+      react: 18.3.1
+
   '@testing-library/dom@10.4.1':
     dependencies:
       '@babel/code-frame': 7.29.0