Full codebase cleanup and optimization pass

- Fix all hardcoded light colors breaking dark mode (FileAttachment, TaskDetail, RequestDetail)
- Parallelize sequential DB fetches in TaskDetail, CompanyDetail, MyProjects
- Add error handling: NewRequest project/file upload, MyCompany update, CompanyDetail prices, AuthContext profile fetch
- Fix currentUser.company_id → currentUser.company?.id in NewRequest
- Remove stale company.email references from InvoiceDetail, ProjectDetail, TaskDetail
- Clean up dead email field from Companies form reset

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/context/AuthContext.jsx

@@ -16,15 +16,19 @@ export function AuthProvider({ children }) {
   const [loading, setLoading] = useState(true);
 
   const fetchAndCacheProfile = async (authUser) => {
-    const { data } = await supabase
-      .from('profiles')
-      .select('*, company:companies(id, name, phone, address)')
-      .eq('id', authUser.id)
-      .single();
-    if (data) {
-      const profile = { ...data, email: authUser.email };
-      setCurrentUser(profile);
-      localStorage.setItem(PROFILE_CACHE_KEY, JSON.stringify(profile));
+    try {
+      const { data } = await supabase
+        .from('profiles')
+        .select('*, company:companies(id, name, phone, address)')
+        .eq('id', authUser.id)
+        .single();
+      if (data) {
+        const profile = { ...data, email: authUser.email };
+        setCurrentUser(profile);
+        localStorage.setItem(PROFILE_CACHE_KEY, JSON.stringify(profile));
+      }
+    } catch (err) {
+      console.error('Profile fetch failed:', err);
     }
   };