feat: show unique entity progress in award summary

Summary cards now display unique entity counts (e.g., unique DXCC countries)
instead of per-band/mode slot counts. This shows actual award progress:
Total entities worked, confirmed, and needed to reach the award target.

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

src/frontend/src/routes/awards/[id]/+page.svelte

@@ -29,6 +29,29 @@
     ? entities
     : entities.filter(e => e.mode === selectedMode);
 
+  // Calculate unique entity progress (for DXCC, DLD, etc.)
+  $: uniqueEntityProgress = (() => {
+    const uniqueEntities = new Map();
+
+    filteredEntities.forEach(e => {
+      const entityName = e.entityName || e.entity || 'Unknown';
+
+      if (!uniqueEntities.has(entityName)) {
+        uniqueEntities.set(entityName, { worked: false, confirmed: false });
+      }
+
+      const status = uniqueEntities.get(entityName);
+      if (e.worked) status.worked = true;
+      if (e.confirmed) status.confirmed = true;
+    });
+
+    return {
+      total: uniqueEntities.size,
+      worked: Array.from(uniqueEntities.values()).filter(s => s.worked).length,
+      confirmed: Array.from(uniqueEntities.values()).filter(s => s.confirmed).length
+    };
+  })();
+
   onMount(async () => {
     await loadAwardData();
   });
@@ -423,20 +446,18 @@
           <span class="summary-value">{targetPoints}</span>
         </div>
       {:else}
-        {@const workedCount = filteredEntities.filter((e) => e.worked).length}
-        {@const confirmedCount = filteredEntities.filter((e) => e.confirmed).length}
-        {@const neededCount = award.target ? Math.max(0, award.target - workedCount) : filteredEntities.filter((e) => !e.worked).length}
+        {@const neededCount = award.target ? Math.max(0, award.target - uniqueEntityProgress.worked) : uniqueEntityProgress.total - uniqueEntityProgress.worked}
         <div class="summary-card">
           <span class="summary-label">Total:</span>
-          <span class="summary-value">{filteredEntities.length}</span>
+          <span class="summary-value">{uniqueEntityProgress.total}</span>
         </div>
         <div class="summary-card confirmed">
           <span class="summary-label">Confirmed:</span>
-          <span class="summary-value">{confirmedCount}</span>
+          <span class="summary-value">{uniqueEntityProgress.confirmed}</span>
         </div>
         <div class="summary-card worked">
           <span class="summary-label">Worked:</span>
-          <span class="summary-value">{workedCount}</span>
+          <span class="summary-value">{uniqueEntityProgress.worked}</span>
         </div>
         <div class="summary-card unworked">
           <span class="summary-label">Needed:</span>