feat(mcp): include full budget items and packing list in trip summary

Expand get_trip_summary to return full budget line items and full
packing list (with checked status) instead of totals/stats only.
Update tool description to accurately reflect all returned data
including todos, files, and collab poll/message counts.

server/src/mcp/tools/trips.ts

@@ -131,7 +131,7 @@ export function registerTripTools(server: McpServer, userId: number): void {
   server.registerTool(
     'get_trip_summary',
     {
-      description: 'Get a full denormalized summary of a trip in a single call: metadata, members, days with assignments and notes, accommodations, budget totals, packing stats, reservations, and collab notes. Use this as a context loader before planning or modifying a trip.',
+      description: 'Get a full denormalized summary of a trip in a single call: metadata, members, days with assignments and notes, accommodations, full budget line items with totals, full packing list with checked status, reservations, collab notes, to-do items, files, and collab poll/message counts. Use this as a context loader before planning or modifying a trip.',
       inputSchema: {
         tripId: z.number().int().positive(),
       },

server/src/services/tripService.ts

@@ -600,6 +600,7 @@ export function getTripSummary(tripId: number) {
 
   const budgetItems = listBudgetItems(tripId);
   const budget = {
+    items: budgetItems,
     item_count: budgetItems.length,
     total: budgetItems.reduce((sum, i) => sum + (i.total_price || 0), 0),
     currency: trip.currency,
@@ -607,6 +608,7 @@ export function getTripSummary(tripId: number) {
 
   const packingItems = listPackingItems(tripId);
   const packing = {
+    items: packingItems,
     total: packingItems.length,
     checked: (packingItems as { checked: number }[]).filter(i => i.checked).length,
   };