feat(analytics): add manual achievement rebuild action

Signed-off-by: Marcus Fihlon <marcus@fihlon.swiss>

src/main/java/net/javahippie/fitpub/controller/AnalyticsController.java

@@ -133,6 +133,25 @@ public class AnalyticsController {
         return ResponseEntity.ok(achievements);
     }
 
+    /**
+     * Rebuild achievements for the authenticated user.
+     */
+    @PostMapping("/achievements/rebuild")
+    public ResponseEntity<RebuildResponse> rebuildAchievements(
+            @AuthenticationPrincipal UserDetails userDetails) {
+
+        UUID userId = getUserId(userDetails);
+
+        try {
+            achievementService.rebuildAchievementsForUser(userId);
+            return ResponseEntity.ok(new RebuildResponse("Achievements recalculated successfully"));
+        } catch (Exception e) {
+            log.error("Failed to rebuild achievements for user {}", userDetails.getUsername(), e);
+            return ResponseEntity.internalServerError()
+                    .body(new RebuildResponse("Failed to recalculate achievements: " + e.getMessage()));
+        }
+    }
+
     /**
      * Get training load for a date range.
      */
@@ -276,4 +295,6 @@ public class AnalyticsController {
             case UNKNOWN -> "Not enough data to calculate form status.";
         };
     }
+
+    private record RebuildResponse(String message) {}
 }

src/main/resources/templates/analytics/achievements.html

@@ -13,10 +13,15 @@
                 <h1>
                     <i class="bi bi-award-fill" style="color: var(--accent-orange);"></i> Achievements
                 </h1>
+                <div class="d-flex gap-2">
+                    <button id="rebuild-achievements-btn" type="button" class="btn btn-outline-secondary">
+                        <i class="bi bi-arrow-repeat"></i> Recalculate
+                    </button>
                     <a href="/analytics" class="btn btn-outline-primary">
                         <i class="bi bi-arrow-left"></i> Back to Dashboard
                     </a>
                 </div>
+            </div>
 
         <!-- Stats Summary -->
         <div class="row g-3 mb-4">
@@ -100,6 +105,35 @@
             }
         }
 
+        async function rebuildAchievements() {
+            const rebuildBtn = document.getElementById('rebuild-achievements-btn');
+            const originalContent = rebuildBtn.innerHTML;
+
+            rebuildBtn.disabled = true;
+            rebuildBtn.innerHTML = '<span class="spinner-border spinner-border-sm me-2" role="status" aria-hidden="true"></span>Recalculating...';
+
+            try {
+                const response = await FitPubAuth.authenticatedFetch('/api/analytics/achievements/rebuild', {
+                    method: 'POST'
+                });
+
+                const result = await response.json();
+
+                if (!response.ok) {
+                    throw new Error(result.message || 'Failed to recalculate achievements');
+                }
+
+                FitPub.showAlert('success', result.message || 'Achievements recalculated successfully');
+                await loadAchievements();
+            } catch (error) {
+                console.error('Error rebuilding achievements:', error);
+                FitPub.showAlert('danger', error.message || 'Failed to recalculate achievements');
+            } finally {
+                rebuildBtn.disabled = false;
+                rebuildBtn.innerHTML = originalContent;
+            }
+        }
+
         function updateStats(achievements) {
             // Earned count
             document.getElementById('earned-count').textContent = achievements.length;
@@ -108,6 +142,8 @@
             if (achievements.length > 0) {
                 const latest = new Date(achievements[0].earnedAt);
                 document.getElementById('latest-date').textContent = latest.toLocaleDateString();
+            } else {
+                document.getElementById('latest-date').textContent = '-';
             }
 
             // Completion percentage
@@ -217,6 +253,7 @@
                 window.location.href = '/auth/login';
                 return;
             }
+            document.getElementById('rebuild-achievements-btn').addEventListener('click', rebuildAchievements);
             loadAchievements();
         });
     </script>