🚀 feat(web/channels): Deep modular refactor of Channels table

1. Split monolithic `ChannelsTable` (2200+ LOC) into focused components
   • `channels/index.jsx` – composition entry
   • `ChannelsTable.jsx` – pure `<Table>` rendering
   • `ChannelsActions.jsx` – bulk & settings toolbar
   • `ChannelsFilters.jsx` – search / create / column-settings form
   • `ChannelsTabs.jsx` – type tabs
   • `ChannelsColumnDefs.js` – column definitions & render helpers
   • `modals/` – BatchTag, ColumnSelector, ModelTest modals

2. Extract domain hook
   • Moved `useChannelsData.js` → `src/hooks/channels/useChannelsData.js`
     – centralises state, API calls, pagination, filters, batch ops
     – now exports `setActivePage`, fixing tab / status switch errors

3. Update wiring
   • All sub-components consume data via `useChannelsData` props
   • Adjusted import paths after hook relocation

4. Clean legacy file
   • Legacy `components/table/ChannelsTable.js` now re-exports new module

5. Bug fixes
   • Tab switching, status filter & tag aggregation restored
   • Column selector & batch actions operate via unified hook

This commit completes the first phase of modularising the Channels feature, laying groundwork for consistent, maintainable table architecture across the app.

web/src/components/settings/ChannelSelectorModal.js

@@ -1,5 +1,5 @@
 import React, { useState, useEffect, forwardRef, useImperativeHandle } from 'react';
-import { useIsMobile } from '../../hooks/useIsMobile.js';
+import { useIsMobile } from '../../hooks/common/useIsMobile.js';
 import {
   Modal,
   Table,