🔍 fix: select search filter

Summary
• Introduced a unified `selectFilter` helper that matches both `option.value` and `option.label`, ensuring all `<Select>` components support intuitive search (fixes channel “type” dropdown not filtering).
• Replaced all usages of the old `modelSelectFilter` with `selectFilter` in:
  • `EditChannelModal.jsx`
  • `SettingsPanel.js`
  • `EditTokenModal.jsx`
  • `EditTagModal.jsx`
• Removed the deprecated `modelSelectFilter` export from `utils.js` (no backward-compat alias).
• Updated documentation comments accordingly.

Why
The old filter only inspected `option.value`, causing searches to fail when `label` carried the meaningful text (e.g., numeric IDs for channel types). The new helper searches both fields, covering all scenarios and unifying the API across the codebase.

Notes
No functional regressions expected; all components have been migrated.

web/src/helpers/utils.js

@@ -560,12 +560,16 @@ export function setTableCompactMode(compact, tableKey = 'global') {
 
 // -------------------------------
 // Select 组件统一过滤逻辑
-// 解决 label 为 ReactNode（带图标等）时无法用内置 filter 搜索的问题。
-// 使用方式： <Select filter={modelSelectFilter} ... />
-export const modelSelectFilter = (input, option) => {
+// 使用方式： <Select filter={selectFilter} ... />
+// 统一的 Select 搜索过滤逻辑 -- 支持同时匹配 option.value 与 option.label
+export const selectFilter = (input, option) => {
   if (!input) return true;
-  const val = (option?.value || '').toString().toLowerCase();
-  return val.includes(input.trim().toLowerCase());
+
+  const keyword = input.trim().toLowerCase();
+  const valueText = (option?.value ?? '').toString().toLowerCase();
+  const labelText = (option?.label ?? '').toString().toLowerCase();
+
+  return valueText.includes(keyword) || labelText.includes(keyword);
 };
 
 // -------------------------------