🚀 feat(ui): isolate ratio configurations into dedicated “Ratio” tab and refactor settings components

Summary
• Added new Ratio tab in Settings for managing all ratio-related configurations (group & model multipliers).
• Created `RatioSetting` component to host GroupRatio, ModelRatio, Visual Editor and Unset-Models panels.
• Moved ratio components to `web/src/pages/Setting/Ratio/` directory:
  – `GroupRatioSettings.js`
  – `ModelRatioSettings.js`
  – `ModelSettingsVisualEditor.js`
  – `ModelRationNotSetEditor.js`
• Updated imports in `RatioSetting.js` to use the new path.
• Updated main Settings router (`web/src/pages/Setting/index.js`) to include the new “Ratio Settings” tab.
• Pruned `OperationSetting.js`:
  – Removed ratio-specific cards, tabs and unused imports.
  – Reduced state to only the keys required by its child components.
  – Deleted obsolete fields (`StreamCacheQueueLength`, `CheckSensitiveOnCompletionEnabled`, `StopOnSensitiveEnabled`).
• Added boolean handling simplification in `OperationSetting.js`.
• Adjusted helper import list and removed unused translation hook.

Why
Separating ratio-related settings improves UX clarity, reduces cognitive load in the Operation Settings panel and keeps the codebase modular and easier to maintain.

BREAKING CHANGE
The file paths for ratio components have changed. Any external imports referencing the old `Operation` directory must update to the new `Ratio` path.

web/src/i18n/locales/en.json

@@ -1588,7 +1588,7 @@
   "性能指标": "Performance Indicators",
   "模型数据分析": "Model Data Analysis",
   "搜索无结果": "No results found",
-  "仪表盘配置": "Dashboard Configuration",
+  "仪表盘设置": "Dashboard Settings",
   "API信息管理，可以配置多个API地址用于状态展示和负载均衡（最多50个）": "API information management, you can configure multiple API addresses for status display and load balancing (maximum 50)",
   "线路描述": "Route description",
   "颜色": "Color",