remove /api/vault endpoints

apps/api/swagger.json

@@ -12,7 +12,6 @@
     { "name": "System", "description": "Health & service info" },
     { "name": "Wallets", "description": "User wallet records" },
     { "name": "Wallet Ops", "description": "Per-chain balance / transactions / send" },
-    { "name": "Vault", "description": "Encrypted mnemonic blob storage (opaque)" },
     { "name": "BTC", "description": "Bitcoin RPC proxy (Blockstream)" },
     { "name": "TRON", "description": "TRON RPC proxy (TronGrid)" },
     { "name": "Solana", "description": "Solana swap proxy (Jupiter)" },
@@ -144,27 +143,6 @@
             "description": "Unsigned tx — формат зависит от chain (kind: btc | tron | evm | solana). Клиент подписывает приватом и broadcast'ит через соответствующий /api/{btc,tron}/broadcast endpoint"
           }
         }
-      },
-      "VaultResponse": {
-        "type": "object",
-        "properties": {
-          "success": { "type": "boolean" },
-          "data": {
-            "type": "object",
-            "properties": {
-              "encryptedVault": { "type": "string", "description": "AES-GCM encrypted mnemonic, base64" },
-              "vaultSalt": { "type": "string", "description": "PBKDF2 salt, hex" }
-            }
-          }
-        }
-      },
-      "VaultPutRequest": {
-        "type": "object",
-        "required": ["encryptedVault", "vaultSalt"],
-        "properties": {
-          "encryptedVault": { "type": "string", "maxLength": 8192 },
-          "vaultSalt": { "type": "string", "maxLength": 128 }
-        }
       }
     }
   },
@@ -285,29 +263,6 @@
       }
     },
 
-    "/vault": {
-      "get": {
-        "summary": "Get user's encrypted mnemonic vault",
-        "tags": ["Vault"],
-        "responses": {
-          "200": { "description": "Encrypted vault blob", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/VaultResponse" } } } },
-          "404": { "description": "Vault not yet stored" }
-        }
-      },
-      "put": {
-        "summary": "Save / replace encrypted mnemonic vault",
-        "description": "Vault — opaque blob (AES-GCM на стороне клиента). Сервер хранит как есть, не расшифровывает.",
-        "tags": ["Vault"],
-        "requestBody": {
-          "required": true,
-          "content": { "application/json": { "schema": { "$ref": "#/components/schemas/VaultPutRequest" } } }
-        },
-        "responses": {
-          "200": { "description": "Saved", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/SuccessEmpty" } } } },
-          "400": { "description": "Invalid input" }
-        }
-      }
-    },
 
     "/btc/utxos/{address}": {
       "get": {