1、增加调用 AI 视频生成能力和虚拟素材库管理的对外api

2、增加后台apikkey管理
3、增加apikey单独的模型定价
4、增加apikey调用情况
5、完善所有数据的注释增加

video-gen-api/app/utils/security.py

@@ -40,6 +40,27 @@ def decrypt_temp_token(token: str) -> str | None:
         return None
 
 
+def encrypt_text(plaintext: str) -> str:
+    """使用 AES-256-GCM 加密字符串，返回 base64 编码的密文。"""
+    import os
+    aesgcm = AESGCM(get_aes_key())
+    nonce = os.urandom(12)  # 96-bit nonce for GCM
+    ciphertext = aesgcm.encrypt(nonce, plaintext.encode(), None)
+    return base64.urlsafe_b64encode(nonce + ciphertext).decode()
+
+
+def decrypt_text(token: str) -> str | None:
+    """解密 AES-256-GCM 加密的字符串。失败返回 None。"""
+    try:
+        token_bytes = base64.urlsafe_b64decode(token)
+        nonce = token_bytes[:12]
+        ciphertext = token_bytes[12:]
+        aesgcm = AESGCM(get_aes_key())
+        return aesgcm.decrypt(nonce, ciphertext, None).decode()
+    except Exception:
+        return None
+
+
 def hmac_sign(data: str) -> str:
     """Create HMAC-SHA256 signature."""
     return hmac.new(