fix: integrate deepseek, resolve silent google api errors, fix google cloud keys

routes/legacy_routes.py

@@ -157,6 +157,40 @@ async def get_available_providers():
             "model": model,
         })
 
+    # DeepSeek direct — if configured
+    if _is_enabled("deepseek", key_var="DEEPSEEK_API_KEY"):
+        ds_cfg = getattr(settings, "deepseek", None)
+        model = _resolve_model(
+            ds_cfg.model if ds_cfg else None,
+            "DEEPSEEK_MODEL",
+            "deepseek-chat",
+        )
+        available.append({
+            "id": "deepseek",
+            "label": "DeepSeek V3",
+            "description": "Traduction IA avancée via DeepSeek",
+            "mode": "llm",
+            "tier": "pro",
+            "model": model,
+        })
+
+    # MiniMax direct — if configured
+    if _is_enabled("minimax", key_var="MINIMAX_API_KEY"):
+        mm_cfg = getattr(settings, "minimax", None)
+        model = _resolve_model(
+            mm_cfg.model if mm_cfg else None,
+            "MINIMAX_MODEL",
+            "abab6.5s-chat",
+        )
+        available.append({
+            "id": "minimax",
+            "label": "MiniMax",
+            "description": "Traduction IA via MiniMax",
+            "mode": "llm",
+            "tier": "pro",
+            "model": model,
+        })
+
     # z.AI / xAI Grok — if configured
     if _is_enabled("zai", key_var="ZAI_API_KEY"):
         zai_cfg = getattr(settings, "zai", None)