fix: Dashboard Widget Data Display Fixes

[christag]

Summary

Fixes dashboard widget APIs to return complete data with proper column names expected by the frontend. This resolves the "Dashboard Widget Fixes - 500 errors" item from the TODO list (though the issue was actually incomplete data, not 500 errors).

Problem

The three expiring items widgets on the dashboard were displaying incomplete/empty data because of column name mismatches between the frontend components and the API responses:

• Expiring Warranties: Frontend expected device_name, but API only returned hostname
• Expiring Licenses: Frontend expected license_name and vendor, but API didn't JOIN with software or companies tables
• Expiring Contracts: Frontend expected contract_title and vendor, but API only returned contract_name without vendor JOIN

Changes

1. Expiring Warranties API (src/app/api/dashboard/expiring-warranties/route.ts)

• Added column alias: d.hostname as device_name
• Frontend now receives the expected device_name field

2. Expiring Licenses API (src/app/api/dashboard/expiring-licenses/route.ts)

• Added JOIN with software table: LEFT JOIN software s ON sl.software_id = s.id
• Added JOIN with companies table: LEFT JOIN companies c ON sl.purchased_from_id = c.id
• Added column aliases:
  • s.product_name as license_name
  • c.company_name as vendor
• Frontend now receives complete license information

3. Expiring Contracts API (src/app/api/dashboard/expiring-contracts/route.ts)

• Added JOIN with companies table: LEFT JOIN companies co ON c.company_id = co.id
• Added column aliases:
  • c.contract_name as contract_title
  • co.company_name as vendor
• Frontend now receives complete contract information

Testing

• ✅ Build passes with 0 errors
• ✅ Lint passes (2 warnings, max 20 allowed)
• ✅ Manual testing via Playwright: All three widgets load without errors
• ✅ Verified proper empty state messages when no data exists
• ✅ No console errors related to dashboard widgets
• ✅ TypeScript interfaces already support all returned fields (no updates needed)

Screenshots

Dashboard showing all three widgets with proper empty states:

Impact

• User Experience: Widgets will now display complete information including device names, license names, contract titles, and vendor information
• API Consistency: All dashboard APIs now return complete data sets with proper column naming
• Performance: LEFT JOINs are efficient and don't impact query performance significantly

Files Modified

• src/app/api/dashboard/expiring-warranties/route.ts - Added column alias
• src/app/api/dashboard/expiring-licenses/route.ts - Added JOINs and aliases
• src/app/api/dashboard/expiring-contracts/route.ts - Added JOIN and aliases

Verification Steps

1. Navigate to dashboard (/)
2. Check "Expiring Warranties" widget - should show device names when data exists
3. Check "Expiring Licenses" widget - should show license names and vendors when data exists
4. Check "Expiring Contracts" widget - should show contract titles and vendors when data exists
5. Verify no console errors

🤖 Generated with Claude Code