feat: add award detail view with QSO count per slot and mode filter

- Award detail page now shows QSO counts per (entity, band, mode) slot
- Click count to open modal with all QSOs for that slot
- Click QSO in list to view full details
- Add mode filter: "Mixed Mode" aggregates by band, specific modes show (band, mode) columns
- Backend groups by slot and collects all confirmed QSOs in qsos array
- Frontend displays clickable count links (removed blue bubbles)

Backend changes:
- calculateDOKAwardProgress(): groups by (DOK, band, mode), collects qsos array
- calculatePointsAwardProgress(): updated for all count modes with qsos array
- getAwardEntityBreakdown(): groups by (entity, band, mode) slots

Frontend changes:
- Add mode filter dropdown with "Mixed Mode" default
- Update grouping logic to handle mixed mode vs specific mode
- Replace count badges with simple clickable links
- Add QSO list modal showing all QSOs per slot
- Add Mode column to QSO list (useful in mixed mode)

Co-Authored-By: Claude <noreply@anthropic.com>

CLAUDE.md

@@ -754,3 +754,53 @@ AND (dclQslRstatus IS NULL OR dclQslRstatus != 'Y')
 - Tracks updated QSOs (restores previous state)
 - Only allows canceling failed jobs or stale running jobs (>1 hour)
 - Server-side validation prevents unauthorized cancellations
+
+### Award Detail View (January 2025)
+
+**Overview**: The award detail page (`src/frontend/src/routes/awards/[id]/+page.svelte`) displays award progress in a pivot table format with entities as rows and band/mode combinations as columns.
+
+**Key Features**:
+- **QSO Count per Slot**: Each table cell shows the count of confirmed QSOs for that (entity, band, mode) combination
+- **Drill-Down**: Click a count to open a modal showing all QSOs for that slot
+- **QSO Detail**: Click any QSO in the list to view full QSO details
+- **Mode Filter**: Filter by specific mode or view "Mixed Mode" (aggregates all modes by band)
+
+**Backend Changes** (`src/backend/services/awards.service.js`):
+- `calculateDOKAwardProgress()`: Groups by (DOK, band, mode) slots, collects all confirmed QSOs in `qsos` array
+- `calculatePointsAwardProgress()`: Updated for all count modes (perBandMode, perStation, perQso) with `qsos` array
+- `getAwardEntityBreakdown()`: Groups by (entity, band, mode) slots for entity awards
+
+**Response Structure**:
+```javascript
+{
+  entity: "F03",
+  band: "80m",
+  mode: "CW",
+  worked: true,
+  confirmed: true,
+  qsos: [
+    { qsoId: 123, callsign: "DK0MU", mode: "CW", qsoDate: "20250115", timeOn: "123456", confirmed: true },
+    { qsoId: 456, callsign: "DL1ABC", mode: "CW", qsoDate: "20250120", timeOn: "234500", confirmed: true }
+  ]
+}
+```
+
+**Mode Filter**:
+- **Mixed Mode (default)**: Shows bands as columns, aggregates all modes
+  - Example: Columns are "80m", "40m", "20m"
+  - Clicking a count shows all QSOs for that band across all modes
+- **Specific Mode**: Shows (band, mode) combinations as columns
+  - Example: Columns are "80m CW", "80m SSB", "40m CW"
+  - Filters to only show QSOs with that mode
+
+**Frontend Components**:
+- **Mode Filter Dropdown**: Located between summary cards and table
+  - Dynamically populated with available modes from the data
+  - Clear button appears when specific mode is selected
+- **Count Badges**: Blue clickable links showing QSO count (removed bubbles, kept links)
+- **QSO List Modal**: Shows all QSOs for selected slot with columns: Callsign, Date, Time, Mode
+- **QSO Detail Modal**: Full QSO information (existing feature)
+
+**Files Modified**:
+- `src/backend/services/awards.service.js` - Backend grouping and QSO collection
+- `src/frontend/src/routes/awards/[id]/+page.svelte` - Frontend display and interaction