refactor(auth): implement token-based authentication with JWT parsing

- Replace authStore with tokenService for authentication management
- Add JWT parsing utility to extract user info from tokens
- Update login flow to use cookie-based token storage
- Modify logout to properly clear auth state and cookies
- Integrate user data into page context for SSR compatibility
- Remove deprecated authStore and related localStorage logic
- Add cookie constants for consistent token handling
- Implement server-side token validation in hooks
- Update HTTP client to use token from cookies instead of store
- Refactor error handling to use unified ApiError class
- Replace manual redirect logic with resolved paths
- Improve type safety with explicit user and auth interfaces
- Add toast notifications for login/logout feedback
- Remove unused sidebar store and related UI logic
- Migrate theme handling to use cookies and context
- Update icon definitions and component references
- Clean up legacy code and unused imports

.idea/compiler.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="TypeScriptCompiler">
+    <option name="useTypesFromServer" value="true" />
+  </component>
+</project>

.idea/inspectionProfiles/Project_Default.xml

@@ -2,5 +2,6 @@
   <profile version="1.0">
     <option name="myName" value="Project Default" />
     <inspection_tool class="Eslint" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="TsLint" enabled="true" level="WARNING" enabled_by_default="true" />
   </profile>
 </component>