refactor: Consolidate script imports to use main.js bundle

- dashboard.templ: Replaced individual script tags with single main.js import
- admin_users.templ, custom_section.templ: Minor formatting/cleanup
- docs.templ: Updated script imports (excluded from Alpine conversion per user request)
- api.ts, docs.ts, password_validation.ts: Minor updates for compatibility

web/src/password_validation.ts

@@ -1,6 +1,8 @@
 // Password validation for registration form
 // Procedural style - no OOP, passive event listeners for password manager compatibility
 
+import { Alpine } from "./alpine";
+
 // Validation check functions
 function hasMinimumLength(password: string): boolean {
   return password.length >= 8;
@@ -185,4 +187,8 @@ function initPasswordValidation(): void {
 }
 
 // Export for use in template
-(window as any).initPasswordValidation = initPasswordValidation;
+export { initPasswordValidation };
+
+Alpine.global("validation", {
+  initPasswordValidation,
+});