refactor(mcp): improve form label layout and simplify text

- Simplify config label from "Full JSON configuration or use" to "Full JSON Configuration"
- Align wizard button to the right using justify-between layout
- Apply same pattern to TOML configuration label
- Improve visual balance with cleaner left-right alignment

src/i18n/locales/zh.json

@@ -468,11 +468,11 @@
       "docs": "文档链接",
       "docsPlaceholder": "https://example.com/docs",
       "additionalInfo": "附加信息",
-      "jsonConfig": "JSON 配置",
+      "jsonConfig": "完整的 JSON 配置",
       "jsonConfigOrPrefix": "完整的 JSON 配置或者使用",
       "tomlConfigOrPrefix": "完整的 TOML 配置或者使用",
       "jsonPlaceholder": "{\n  \"type\": \"stdio\",\n  \"command\": \"uvx\",\n  \"args\": [\"mcp-server-fetch\"]\n}",
-      "tomlConfig": "TOML 配置",
+      "tomlConfig": "完整的 TOML 配置",
       "tomlPlaceholder": "type = \"stdio\"\ncommand = \"uvx\"\nargs = [\"mcp-server-fetch\"]",
       "useWizard": "配置向导",
       "syncOtherSide": "同步到 {{target}}",