fix(web): restore WEB-C1/M4 fixes reverted by rebase conflict resolution

- client.ts: localStorage → sessionStorage (WEB-C1 critical fix)
- proposals.ts: re-add 'Other' to ServiceCategory (WEB-M4)
- ProposalListPage.tsx: STATUS_COLORS → STATUS_CHIP_STYLES (visual design)

web/src/lib/api/client.ts

@@ -13,7 +13,7 @@ const apiClient = axios.create({
 
 apiClient.interceptors.request.use(
   (config) => {
-    const tokenData = window.localStorage.getItem(STORAGE_KEY_TOKEN);
+    const tokenData = window.sessionStorage.getItem(STORAGE_KEY_TOKEN);
     if (tokenData) {
       try {
         const parsed = JSON.parse(tokenData);

web/src/lib/api/proposals.ts

@@ -1,7 +1,7 @@
 import apiClient from './client';
 
 // Fix: WEB-M5 — align with shared contract types (shared/api-contracts/src/index.ts)
-export type ServiceCategory = 'HVAC' | 'Plumbing' | 'Electrical' | 'General' | 'Renovation';
+export type ServiceCategory = 'HVAC' | 'Plumbing' | 'Electrical' | 'General' | 'Renovation' | 'Other';
 export type Priority = 'Standard' | 'Urgent' | 'Emergency';
 
 export interface CreateProposalRequest {

web/src/pages/proposals/list/ProposalListPage.tsx

@@ -21,7 +21,7 @@ import SearchIcon from '@mui/icons-material/Search';
 import AddCircleIcon from '@mui/icons-material/AddCircle';
 import { usePaginatedList } from '../../../hooks/usePaginatedList';
 import { proposalsApi, type ProposalListItem } from '../../../lib/api/proposals';
-import { STATUS_COLORS } from '../../../constants';
+import { STATUS_CHIP_STYLES } from '../../../constants';
 import { formatBidAmount, formatDate, formatDateFull } from '../../../lib/format';
 import { useDocumentTitle } from '../../../hooks/useDocumentTitle';
 
@@ -121,7 +121,7 @@ export default function ProposalListPage() {
                           <Chip
                             label={row.status}
                             size="small"
-                            color={STATUS_COLORS[row.status] || 'default'}
+                            sx={STATUS_CHIP_STYLES[row.status] || {}}
                           />
                         </TableCell>
                         <TableCell align="right">