refactor(ts): Add ES module exports to core utilities

Phase 0/1 of ESBuild migration: Add ES exports to all utility modules
while maintaining Alpine.js registration for template compatibility.

Core utility modules now support both:
- ES module imports for TypeScript→TypeScript dependencies
- Alpine.js global namespace for template onclick handlers

Modules updated:
- api.ts: Export apiGet, apiPost, apiPut, apiDelete, apiPatch, and handlers
- toast.ts: Export showToast function (Alpine namespace already present)
- storage.ts: Export localStorage helpers (already had exports)
- dom.ts: Export DOM manipulation helpers (already had exports)
- events.ts: Export event delegation helpers
- theme.ts: Export theme management functions
- woodPaneling.ts: Export wood paneling functions

Pattern: Each module now has dual exports
- ES module exports for internal TS dependencies
- Alpine.global() registration for template access
- Removed direct window exports where Alpine registration exists

This enables Phase 1 (converting internal window reads to imports) while
maintaining template functionality through Alpine.

Migration progress: Phase 0 complete, Phase 1 in progress
Next: Convert 193+ internal window reads across consumer modules

web/src/storage.ts

@@ -50,34 +50,18 @@ function clearAll(): void {
   localStorage.clear();
 }
 
-(window as any).storage = {
-  getToken,
-  setToken,
-  removeToken,
-  getRefreshToken,
-  setRefreshToken,
-  removeRefreshToken,
-  getTheme,
-  setTheme,
-  getSelectedLibrary,
-  setSelectedLibrary,
-  getSelectedBook,
-  setSelectedBook,
-  clearAll,
-};
-
 export {
-  getToken,
-  setToken,
-  removeToken,
-  getRefreshToken,
-  setRefreshToken,
-  removeRefreshToken,
-  getTheme,
-  setTheme,
-  getSelectedLibrary,
-  setSelectedLibrary,
-  getSelectedBook,
-  setSelectedBook,
   clearAll,
+  getRefreshToken,
+  getSelectedBook,
+  getSelectedLibrary,
+  getTheme,
+  getToken,
+  removeRefreshToken,
+  removeToken,
+  setRefreshToken,
+  setSelectedBook,
+  setSelectedLibrary,
+  setTheme,
+  setToken
 };