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/api.ts

@@ -87,12 +87,12 @@ function handleError(error: unknown, context: string): void {
   }
 }
 
-(window as any).api = {
-  get: apiGet,
-  post: apiPost,
-  put: apiPut,
-  delete: apiDelete,
-  patch: apiPatch,
+export {
+  apiGet,
+  apiPost,
+  apiPut,
+  apiDelete,
+  apiPatch,
   handleResponse,
   handleVoidResponse,
   handleError,

web/src/dom.ts

@@ -102,36 +102,19 @@ function hasClass(element: HTMLElement | null, className: string): boolean {
   return element ? element.classList.contains(className) : false;
 }
 
-(window as any).dom = {
-  escapeHtml,
-  querySelector,
-  querySelectorAll,
-  getElementById,
-  createElement,
-  showElement,
-  hideElement,
-  toggleElement,
-  setTextContent,
-  setInnerHTML,
-  addClass,
-  removeClass,
-  toggleClass,
-  hasClass,
-};
-
 export {
+  addClass,
+  createElement,
   escapeHtml,
+  getElementById,
+  hasClass,
+  hideElement,
   querySelector,
   querySelectorAll,
-  getElementById,
-  createElement,
-  showElement,
-  hideElement,
-  toggleElement,
-  setTextContent,
-  setInnerHTML,
-  addClass,
   removeClass,
+  setInnerHTML,
+  setTextContent,
+  showElement,
   toggleClass,
-  hasClass,
+  toggleElement,
 };

web/src/events.ts

@@ -118,18 +118,18 @@ function stopPropagation(event: Event): void {
   event.stopPropagation();
 }
 
-(window as any).events = {
-  onDelegatedClick,
-  onDelegatedSubmit,
-  onDelegatedChange,
-  onDelegatedKeydown,
+export {
   getDataAttribute,
-  setDataAttribute,
-  onClick,
-  onSubmit,
   onChange,
-  onKeydown,
+  onClick,
+  onDelegatedChange,
+  onDelegatedClick,
+  onDelegatedKeydown,
+  onDelegatedSubmit,
   onInput,
+  onKeydown,
+  onSubmit,
   preventDefault,
+  setDataAttribute,
   stopPropagation,
 };

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
 };

web/src/theme.ts

@@ -137,8 +137,5 @@ if (typeof document !== "undefined") {
   }
 }
 
-// Make changeTheme available globally for HTML onchange attribute
-(window as any).changeTheme = changeTheme;
-
-// Export applyTheme to window for use by header.ts
-(window as any).applyTheme = applyTheme;
+export { applyTheme, changeTheme, initializeTheme, loadTheme, loadUserTheme };
+export type { ThemeType };

web/src/toast.ts

@@ -226,11 +226,14 @@ if (typeof document !== "undefined") {
 }
 
 // Export toast API for manual use
-(window as any).showToast = {
+Alpine.global("showToast", {
   error: (message: string, duration?: number) =>
     showToast(message, "error", duration),
   success: (message: string, duration?: number) =>
     showToast(message, "success", duration),
   info: (message: string, duration?: number) =>
     showToast(message, "info", duration),
-};
+});
+
+export { showToast };
+export type { ToastType };

web/src/woodPaneling.ts

@@ -81,10 +81,7 @@ const updateWoodPanelingIndicators = (): void => {
   });
 };
 
-// Make functions available globally
-(window as any).changeWoodPaneling = changeWoodPaneling;
-(window as any).loadWoodPaneling = loadWoodPaneling;
-(window as any).updateWoodPanelingIndicators = updateWoodPanelingIndicators;
+export { changeWoodPaneling, loadWoodPaneling, updateWoodPanelingIndicators };
 
 // Auto-initialize when DOM is ready
 if (typeof document !== "undefined") {