fix(08-01): move createSelector import to top of module

- Fixed ESLint import/first error on line 317
- Moved createSelector import to top with other @reduxjs/toolkit imports
- Blocking issue preventing dev server startup

jam-ui/src/store/features/sessionChatSlice.js

@@ -1,4 +1,4 @@
-import { createSlice, createAsyncThunk } from '@reduxjs/toolkit';
+import { createSlice, createAsyncThunk, createSelector } from '@reduxjs/toolkit';
 import { getChatMessages, sendChatMessage } from '../../helpers/rest';
 import { saveLastReadAt, loadLastReadAt } from '../../helpers/chatStorage';
 
@@ -314,7 +314,6 @@ export const {
 } = sessionChatSlice.actions;
 
 // Phase 7 Plan 3: Memoized selectors using createSelector from Redux Toolkit
-import { createSelector } from '@reduxjs/toolkit';
 
 /**
  * Input selectors for memoized selectors