♻️ refactor(channels): migrate edit components to modals structure

Move EditChannel and EditTagModal from standalone pages to modal components
within the channels module structure for consistency with other table modules.

Changes:
- Move EditChannel.js → components/table/channels/modals/EditChannelModal.jsx
- Move EditTagModal.js → components/table/channels/modals/EditTagModal.jsx
- Update import paths in channels/index.jsx
- Remove standalone routes for EditChannel from App.js
- Delete original files from pages/Channel/

This change aligns the channels module with the established modular pattern
used by tokens, users, redemptions, and other table modules, centralizing
all channel management functionality within integrated modal components
instead of separate page routes.

BREAKING CHANGE: EditChannel standalone routes (/console/channel/edit/:id
and /console/channel/add) have been removed. All channel editing is now
handled through modal components within the main channels page.

web/src/App.js

@@ -12,7 +12,6 @@ import PasswordResetForm from './components/auth/PasswordResetForm.js';
 import PasswordResetConfirm from './components/auth/PasswordResetConfirm.js';
 import Channel from './pages/Channel';
 import Token from './pages/Token';
-import EditChannel from './pages/Channel/EditChannel';
 import Redemption from './pages/Redemption';
 import TopUp from './pages/TopUp';
 import Log from './pages/Log';
@@ -61,22 +60,6 @@ function App() {
             </PrivateRoute>
           }
         />
-        <Route
-          path='/console/channel/edit/:id'
-          element={
-            <Suspense fallback={<Loading></Loading>} key={location.pathname}>
-              <EditChannel />
-            </Suspense>
-          }
-        />
-        <Route
-          path='/console/channel/add'
-          element={
-            <Suspense fallback={<Loading></Loading>} key={location.pathname}>
-              <EditChannel />
-            </Suspense>
-          }
-        />
         <Route
           path='/console/token'
           element={