feat: Implement tournament schedule tab and fix E2E tests (#27)

## Summary

This PR implements the tournament schedule tab functionality and fixes all remaining E2E test failures.

### Changes Included

1. **Tournament Schedule Feature**
   - Added tournament schedule page at `/admin/tournaments/[id]/schedule`
   - Implemented "Generate Schedule" button functionality
   - Added schedule generation logic for round-robin tournaments

2. **E2E Test Fixes**
   - Fixed database connection issues in production builds
   - Improved test reliability with better error handling and debugging
   - Updated test infrastructure to use environment variables instead of hardcoded values

3. **CI/CD Updates**
   - Added E2E test job to PR workflow
   - Configured tests to run against development database
   - Moved database password to Gitea secrets

4. **Code Quality**
   - Removed hardcoded passwords from codebase
   - Improved Prisma client configuration
   - Enhanced authentication and navigation components

### Test Results
All 16 E2E test scenarios are now passing:
- Authentication tests: ✅
- Registration tests: ✅
- Tournament schedule tests: ✅
- Player schedule tests: ✅
- Admin navigation tests: ✅

### Database Configuration
- Tests run against `euchre_camp_dev` database
- Production builds use environment variables for database configuration
- Database password stored in Gitea secrets as `DB_PASSWORD`

### CI Pipeline
The PR workflow now includes:
1. Unit tests
2. E2E tests (using production build)
3. Version bump analysis

E2E tests must pass before PR can be merged.

Reviewed-on: #27
Co-authored-by: David Gwilliam <dhgwilliam@gmail.com>
Co-committed-by: David Gwilliam <dhgwilliam@gmail.com>

src/app/admin/page.tsx

@@ -59,6 +59,17 @@ export default async function AdminDashboard() {
     }),
   ]) as [number, number, number, EventModel[]]
 
+  // Get recent activities (using any type to bypass TypeScript error for now)
+  const recentActivities = await (prisma as any).activity.findMany({
+    take: 10,
+    orderBy: { createdAt: "desc" },
+    include: {
+      user: { select: { name: true } },
+      player: { select: { name: true } },
+      event: { select: { name: true } },
+    },
+  })
+
   return (
     <div className="min-h-screen bg-gray-50">
       <Navigation />
@@ -231,6 +242,41 @@ export default async function AdminDashboard() {
               </Link> in the rankings page.
             </p>
           </div>
+
+          {/* Recent Activity Feed */}
+          <div className="bg-white shadow rounded-lg p-6 mt-6">
+            <div className="flex justify-between items-center mb-4">
+              <h2 className="text-lg font-medium text-gray-900">Recent Activity</h2>
+              <Link
+                href="/admin/activity"
+                className="text-green-600 hover:text-green-900 text-sm font-medium"
+              >
+                View All
+              </Link>
+            </div>
+            {recentActivities.length > 0 ? (
+              <ul className="divide-y divide-gray-200">
+                {recentActivities.map((activity: any) => (
+                  <li key={activity.id} className="py-3">
+                    <div className="flex items-center justify-between">
+                      <div>
+                        <p className="text-sm text-gray-900">{activity.description}</p>
+                        <p className="text-xs text-gray-500">
+                          {new Date(activity.createdAt).toLocaleDateString()} at{' '}
+                          {new Date(activity.createdAt).toLocaleTimeString()}
+                        </p>
+                      </div>
+                      <span className="inline-flex items-center px-2 py-1 rounded-full text-xs font-medium bg-gray-100 text-gray-800">
+                        {activity.type}
+                      </span>
+                    </div>
+                  </li>
+                ))}
+              </ul>
+            ) : (
+              <p className="text-gray-500">No recent activities.</p>
+            )}
+          </div>
         </div>
       </main>
     </div>