feat(frontend): improve login error handling and user avatar

- Implemented more specific error messages for the login page, distinguishing between invalid credentials and server errors.
- Updated i18n files with new translations for login error messages.
- Improved the avatar fallback to use the user's email initials if their name is not available.
- Removed frontend-source.tar.gz from tracking.
- Chore: Added debug logs to the seeder-api location loader.

frontend/src/app/login/page.tsx

@@ -83,7 +83,15 @@ export default function LoginPage() {
     } catch (err: any) {
       console.error('🔥 [LOGIN FRONT] Erro no login:', err);
       console.error('🔥 [LOGIN FRONT] Detalhes:', err.response?.data || err.message);
-      setError(err.message || t("auth.login.errors.generic"));
+
+      const errorMessage = err.message;
+      if (errorMessage === "AUTH_INVALID_CREDENTIALS") {
+        setError(t("auth.login.errors.invalidCredentials"));
+      } else if (errorMessage === "AUTH_SERVER_ERROR") {
+        setError(t("auth.login.errors.serverError"));
+      } else {
+        setError(t("auth.login.errors.generic"));
+      }
     } finally {
       setLoading(false);
     }

frontend/src/components/dashboard-header.tsx

@@ -69,7 +69,11 @@ export function DashboardHeader() {
                       alt={user?.name}
                     />
                     <AvatarFallback className="bg-primary/10 text-primary">
-                      {user?.name ? getInitials(user.name) : "U"}
+                      {user?.name
+                        ? getInitials(user.name)
+                        : user?.email
+                          ? getInitials(user.email.split('@')[0])
+                          : "U"}
                     </AvatarFallback>
                   </Avatar>
                 </Button>

frontend/src/i18n/en.json

@@ -256,7 +256,8 @@
         "password": "Password must be at least 3 characters"
       },
       "errors": {
-        "invalidCredentials": "Invalid username or password.",
+        "invalidCredentials": "Incorrect email or password. Please try again.",
+        "serverError": "Server error. Please try again later.",
         "generic": "Error signing in. Please try again."
       }
     },

frontend/src/i18n/es.json

@@ -256,7 +256,8 @@
         "password": "La contraseña debe tener al menos 3 caracteres"
       },
       "errors": {
-        "invalidCredentials": "Usuario o contraseña inválidos.",
+        "invalidCredentials": "Correo electrónico o contraseña incorrectos. Por favor inténtalo de nuevo.",
+        "serverError": "Error del servidor. Por favor inténtalo más tarde.",
         "generic": "Error al iniciar sesión. Inténtalo de nuevo."
       }
     },

frontend/src/i18n/pt-BR.json

@@ -256,7 +256,8 @@
         "password": "Senha deve ter pelo menos 3 caracteres"
       },
       "errors": {
-        "invalidCredentials": "Usuário ou senha inválidos.",
+        "invalidCredentials": "E-mail ou senha incorretos. Por favor, tente novamente.",
+        "serverError": "Erro no servidor. Por favor, tente mais tarde.",
         "generic": "Erro ao fazer login. Tente novamente."
       }
     },

frontend/src/lib/auth.ts

@@ -36,9 +36,9 @@ export async function login(
 
     if (!res.ok) {
       if (res.status === 401) {
-        throw new Error("Credenciais inválidas");
+        throw new Error("AUTH_INVALID_CREDENTIALS");
       }
-      throw new Error("Erro no servidor");
+      throw new Error("AUTH_SERVER_ERROR");
     }
 
     const data: LoginResponse = await res.json();
@@ -199,7 +199,7 @@ export async function registerCandidate(data: RegisterCandidateData): Promise<vo
   if (!res.ok) {
     const errorData = await res.json().catch(() => ({}));
     console.error('[registerCandidate] Error response:', res.status, errorData);
-    throw new Error(errorData.message || `Erro no registro: ${res.status}`);
+    throw new Error(errorData.message || `Registration failed: ${res.status}`);
   }
 
   const responseData = await res.json().catch(() => ({}));
@@ -246,7 +246,7 @@ export async function registerCompany(data: RegisterCompanyData): Promise<void>
   if (!res.ok) {
     const errorData = await res.json().catch(() => ({}));
     console.error('[registerCompany] Error response:', res.status, errorData);
-    throw new Error(errorData.message || `Erro no registro: ${res.status}`);
+    throw new Error(errorData.message || `Registration failed: ${res.status}`);
   }
 
   const responseData = await res.json().catch(() => ({}));

seeder-api/src/seeders/location-loader.js

@@ -73,8 +73,9 @@ function transformSubregionsInsert(stmt) {
     // To:      [id, name, continent_id, translations, created, updated, flag, wiki_data_id]
     if (values.length >= 8) {
         const [id, name, translations, region_id, created, updated, flag, wikiDataId] = values;
+        console.log(`DEBUG: Subregions reorder: id=${id}, region=${region_id}`);
         const reordered = [id, name, region_id, translations, created, updated, flag, wikiDataId];
-        return `INSERT INTO subregions (id, name, continent_id, translations, created_at, updated_at, flag, wiki_data_id) VALUES (${reordered.join(', ')});`;
+        return `INSERT INTO public.subregions (id, name, continent_id, translations, created_at, updated_at, flag, wiki_data_id) VALUES (${reordered.join(', ')});`;
     }
 
     return stmt;
@@ -92,7 +93,10 @@ function transformSubregionsInsert(stmt) {
  */
 function transformCountriesInsert(stmt) {
     const valuesMatch = stmt.match(/VALUES\s*\((.+)\);?$/is);
-    if (!valuesMatch) return stmt;
+    if (!valuesMatch) {
+        console.log('DEBUG: Regex failed for subregions!');
+        return stmt;
+    }
 
     const valuesStr = valuesMatch[1];
     const values = parseValues(valuesStr);
@@ -313,7 +317,8 @@ async function executeSqlFile(filename, tableName) {
             }
 
             // Apply special transformations for subregions (column reordering)
-            if (pgStmt.includes('INSERT INTO subregions')) {
+            if (pgStmt.includes('INSERT INTO subregions') || pgStmt.includes('INSERT INTO public.subregions')) {
+                console.log('DEBUG: Transforming subregions insert...');
                 pgStmt = transformSubregionsInsert(pgStmt);
             }