Remove public API - require Google Cloud authentication

- Removed public API access as requested by user
- App now requires either GOOGLE_API_KEY or GOOGLE_SERVICE_ACCOUNT_JSON
- Added comprehensive setup instructions in error screen
- Shows clear guidance for both API key and Service Account options
- App will not start without proper Google Cloud authentication

🤖 Generated with [Claude Code](https://claude.ai/code)

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

google_auth.py

@@ -87,10 +87,10 @@ class PageSpeedAPI:
                 }
                 
                 # Try different authentication methods in order of preference
+                # Removed public API as per user request
                 auth_methods = [
                     ('api_key', self._get_api_key_auth),
-                    ('oauth2', self._get_oauth2_auth),
-                    ('public', self._get_public_auth)
+                    ('oauth2', self._get_oauth2_auth)
                 ]
                 
                 last_response = None
@@ -168,6 +168,10 @@ class PageSpeedAPI:
         return {}, {}
     
     def is_available(self) -> bool:
-        """Check if the PageSpeed API is available."""
-        # API is always available - we'll try different auth methods
-        return True
+        """Check if the PageSpeed API is available with authentication."""
+        # Check if we have any authentication method available
+        api_key = os.environ.get('GOOGLE_API_KEY')
+        has_api_key = api_key and len(api_key) < 100
+        has_oauth = self.authenticator.is_authenticated()
+        
+        return has_api_key or has_oauth

pagespeed_client.py

@@ -12,7 +12,8 @@ class PageSpeedClient:
     """Client for PageSpeed Insights API with OAuth2 authentication."""
     def __init__(self):
         self.api_client = PageSpeedAPI()
-        # API is now always available - we'll try different auth methods
+        if not self.api_client.is_available():
+            raise ValueError("Google authentication required. Configure GOOGLE_API_KEY or GOOGLE_SERVICE_ACCOUNT_JSON.")
     
     def extract_pagespeed_data(self, report_url: str) -> Optional[PageSpeedData]:
         """Extract PageSpeed data from a PageSpeed Insights report URL."""

ui.py

@@ -28,6 +28,37 @@ class PageSpeedUI:
     def create_interface(self) -> gr.Blocks:
         """Create and configure the Gradio interface."""
         with gr.Blocks(title="PageSpeed Insights Comparator", theme=gr.themes.Soft()) as demo:
+            if self.config_error:
+                gr.Markdown(f"""
+                # ❌ Configuração do Google Cloud Necessária
+                
+                **Erro:** {self.config_error}
+                
+                Para usar este app com seu projeto Google Cloud, você precisa configurar uma das opções:
+                
+                ## **Opção 1: Google API Key (Recomendado)**
+                1. Vá para [Google Cloud Console](https://console.cloud.google.com/)
+                2. Selecione seu projeto
+                3. Vá para **APIs & Services** → **Library**
+                4. Pesquise e ative "PageSpeed Insights API"
+                5. Vá para **APIs & Services** → **Credentials**
+                6. Clique **+ CREATE CREDENTIALS** → **API key**
+                7. Copie sua API key (ex: `AIzaSyD...`)
+                8. Adicione no Space: `GOOGLE_API_KEY` = sua chave
+                
+                ## **Opção 2: Service Account (Avançado)**
+                1. No Google Cloud Console, vá para **IAM & Admin** → **Service Accounts**
+                2. Crie uma Service Account
+                3. Baixe o arquivo JSON
+                4. Adicione no Space: `GOOGLE_SERVICE_ACCOUNT_JSON` = conteúdo do JSON
+                
+                ## **Configurar no Hugging Face:**
+                1. Settings → Variables and secrets
+                2. Adicione uma das variáveis acima
+                3. Reinicie o Space
+                """)
+                return demo
+                
             # Check authentication status
             has_openai = bool(config.openai_api_key)
             has_google_key = bool(os.environ.get('GOOGLE_API_KEY')) and len(os.environ.get('GOOGLE_API_KEY', '')) < 100
@@ -40,7 +71,7 @@ class PageSpeedUI:
             elif has_google_service:
                 auth_status.append("✅ Google Service Account configurado")
             else:
-                auth_status.append("✅ Usando Google PageSpeed público")
+                auth_status.append("❌ Google authentication não configurado")
             
             if has_openai:
                 auth_status.append("✅ OpenAI configurado")
@@ -60,8 +91,6 @@ class PageSpeedUI:
             3. Clique em "Comparar Análises"
             
             **Exemplo de URL:** `https://pagespeed.web.dev/analysis/https-www-example-com/abc123?form_factor=mobile`
-            
-            {"**⚠️ Importante:** API pública tem limites de uso. Se receber erro de rate limit, aguarde alguns minutos ou configure um Google API Key para limites maiores." if not has_google_key and not has_google_service else ""}
             """)
             
             with gr.Row():