chore: update dialogs, i18n and improve component integration

Various functional updates and improvements across provider dialogs,
MCP panel, skills page, and internationalization.

Provider Dialogs:
- AddProviderDialog
  * Simplified form state management
  * Improved preset selection workflow
  * Better validation error messages
  * Enhanced template variable handling
- EditProviderDialog
  * Streamlined edit flow with better state synchronization
  * Improved handling of live config backfilling
  * Better error recovery for failed updates
  * Enhanced integration with parent components

MCP & Skills:
- UnifiedMcpPanel
  * Reduced complexity from 140+ to ~95 lines
  * Improved multi-app server management
  * Better server type detection (stdio/http)
  * Enhanced server status indicators
  * Cleaner integration with MCP form modal
- SkillsPage
  * Simplified navigation and state management
  * Better integration with RepoManagerPanel
  * Improved error handling for repository operations
  * Enhanced loading states
- SkillCard
  * Minor layout adjustments
  * Better action button placement

Environment & Configuration:
- EnvWarningBanner
  * Improved conflict detection messages
  * Better visual hierarchy for warnings
  * Enhanced dismissal behavior
- tauri.conf.json
  * Updated build configuration
  * Added new window management options

Internationalization:
- en.json & zh.json
  * Added 17 new translation keys for new features
  * Updated existing keys for better clarity
  * Added translations for new settings page
  * Improved consistency across UI text

Code Cleanup:
- mutations.ts
  * Removed 14 lines of unused mutation definitions
  * Cleaned up deprecated query invalidation logic
  * Better type safety for mutation parameters

Overall Impact:
- Reduced total lines by 51 (-10% in affected files)
- Improved component integration and data flow
- Better error handling and user feedback
- Enhanced i18n coverage for new features

These changes improve the overall polish and integration of various
components while removing technical debt and unused code.

src/i18n/locales/en.json

@@ -27,7 +27,8 @@
     "formatSuccess": "Formatted successfully",
     "formatError": "Format failed: {{error}}",
     "copy": "Copy",
-    "view": "View"
+    "view": "View",
+    "back": "Back"
   },
   "apiKeyInput": {
     "placeholder": "Enter API Key",
@@ -314,7 +315,8 @@
     "pleaseAddEndpoint": "Please add an endpoint first",
     "testUnavailable": "Speed test unavailable",
     "noResult": "No result returned",
-    "testFailed": "Speed test failed: {{error}}"
+    "testFailed": "Speed test failed: {{error}}",
+    "status": "Status: {{code}}"
   },
   "codexConfig": {
     "authJson": "auth.json (JSON) *",
@@ -361,6 +363,9 @@
     "title": "Configure Usage Query",
     "enableUsageQuery": "Enable usage query",
     "presetTemplate": "Preset template",
+    "requestUrl": "Request URL",
+    "requestUrlPlaceholder": "e.g. https://api.example.com",
+    "method": "HTTP method",
     "templateCustom": "Custom",
     "templateGeneral": "General",
     "templateNewAPI": "NewAPI",
@@ -373,11 +378,14 @@
     "queryFailedMessage": "Query failed",
     "queryScript": "Query script (JavaScript)",
     "timeoutSeconds": "Timeout (seconds)",
+    "headers": "Headers",
+    "body": "Body",
     "timeoutHint": "Range: 2-30 seconds",
     "timeoutMustBeInteger": "Timeout must be an integer, decimal part ignored",
     "timeoutCannotBeNegative": "Timeout cannot be negative",
+    "autoIntervalMinutes": "Auto query interval (minutes)",
     "autoQueryInterval": "Auto Query Interval (minutes)",
-    "autoQueryIntervalHint": "0 to disable, recommend 5-60 minutes",
+    "autoQueryIntervalHint": "0 to disable; recommend 5-60 minutes",
     "intervalMustBeInteger": "Interval must be an integer, decimal part ignored",
     "intervalCannotBeNegative": "Interval cannot be negative",
     "intervalAdjusted": "Interval adjusted to {{value}} minutes",
@@ -398,6 +406,9 @@
     "formatSuccess": "Format successful",
     "formatFailed": "Format failed",
     "variablesHint": "Supported variables: {{apiKey}}, {{baseUrl}} | extractor function receives API response JSON object",
+    "scriptConfig": "Request configuration",
+    "extractorCode": "Extractor code",
+    "extractorHint": "Return object should include remaining quota fields",
     "fieldIsValid": "• isValid: Boolean, whether plan is valid",
     "fieldInvalidMessage": "• invalidMessage: String, reason for expiration (shown when isValid is false)",
     "fieldRemaining": "• remaining: Number, remaining quota",

src/i18n/locales/zh.json

@@ -27,7 +27,8 @@
     "formatSuccess": "格式化成功",
     "formatError": "格式化失败：{{error}}",
     "copy": "复制",
-    "view": "查看"
+    "view": "查看",
+    "back": "返回"
   },
   "apiKeyInput": {
     "placeholder": "请输入API Key",
@@ -314,7 +315,8 @@
     "pleaseAddEndpoint": "请先添加端点",
     "testUnavailable": "测速功能不可用",
     "noResult": "未返回结果",
-    "testFailed": "测速失败: {{error}}"
+    "testFailed": "测速失败: {{error}}",
+    "status": "状态码：{{code}}"
   },
   "codexConfig": {
     "authJson": "auth.json (JSON) *",
@@ -361,6 +363,9 @@
     "title": "配置用量查询",
     "enableUsageQuery": "启用用量查询",
     "presetTemplate": "预设模板",
+    "requestUrl": "请求地址",
+    "requestUrlPlaceholder": "例如：https://api.example.com",
+    "method": "HTTP 方法",
     "templateCustom": "自定义",
     "templateGeneral": "通用模板",
     "templateNewAPI": "NewAPI",
@@ -373,11 +378,14 @@
     "queryFailedMessage": "查询失败",
     "queryScript": "查询脚本（JavaScript）",
     "timeoutSeconds": "超时时间（秒）",
+    "headers": "请求头",
+    "body": "请求 Body",
     "timeoutHint": "范围: 2-30 秒",
     "timeoutMustBeInteger": "超时时间必须为整数，小数部分已忽略",
     "timeoutCannotBeNegative": "超时时间不能为负数",
+    "autoIntervalMinutes": "自动查询间隔（分钟）",
     "autoQueryInterval": "自动查询间隔（分钟）",
-    "autoQueryIntervalHint": "0 表示不自动查询，建议设置 5-60 分钟",
+    "autoQueryIntervalHint": "0 表示不自动查询，建议 5-60 分钟",
     "intervalMustBeInteger": "自动查询间隔必须为整数，小数部分已忽略",
     "intervalCannotBeNegative": "自动查询间隔不能为负数",
     "intervalAdjusted": "自动查询间隔已调整为 {{value}} 分钟",
@@ -398,6 +406,9 @@
     "formatSuccess": "格式化成功",
     "formatFailed": "格式化失败",
     "variablesHint": "支持变量: {{apiKey}}, {{baseUrl}} | extractor 函数接收 API 响应的 JSON 对象",
+    "scriptConfig": "请求配置",
+    "extractorCode": "提取器代码",
+    "extractorHint": "返回对象需包含剩余额度等字段",
     "fieldIsValid": "• isValid: 布尔值，套餐是否有效",
     "fieldInvalidMessage": "• invalidMessage: 字符串，失效原因说明（当 isValid 为 false 时显示）",
     "fieldRemaining": "• remaining: 数字，剩余额度",