feat(analytics/dashboard): add 'today-by-task' API and dashboard card

- Add GET /api/analytics/today-by-task to return today’s totals grouped by task
  - Defaults to current user; admins can pass user_id
  - Optional date=YYYY-MM-DD
  - Groups by project/task; includes project-level entries without a task as “No task”
  - Sums durations across multiple entries for the same task (e.g., 08–09 + 11–12 = 2.00h)
  - Returns project_name, task_name, total_hours, total_seconds
- Dashboard: add “Today by Task” card that fetches and renders aggregated hours
  - Shows empty-state message when no data
  - Adds small i18n keys for labels

No DB migrations. Backwards compatible.

app/routes/analytics.py

@@ -1,7 +1,7 @@
 from flask import Blueprint, render_template, request, jsonify
 from flask_login import login_required, current_user
 from app import db
-from app.models import User, Project, TimeEntry, Settings
+from app.models import User, Project, TimeEntry, Settings, Task
 from datetime import datetime, timedelta
 from sqlalchemy import func, extract
 import calendar
@@ -328,3 +328,74 @@ def project_efficiency():
             }
         ]
     })
+
+
+@analytics_bp.route('/api/analytics/today-by-task')
+@login_required
+def today_by_task():
+    """Get today's total hours grouped by task (includes project-level entries without task).
+
+    Optional query params:
+    - date: YYYY-MM-DD (defaults to today)
+    - user_id: admin-only override to view a specific user's data
+    """
+    # Parse target date
+    date_str = request.args.get('date')
+    if date_str:
+        try:
+            target_date = datetime.strptime(date_str, '%Y-%m-%d').date()
+        except ValueError:
+            return jsonify({'error': 'Invalid date format, expected YYYY-MM-DD'}), 400
+    else:
+        target_date = datetime.now().date()
+
+    # Base query
+    query = db.session.query(
+        TimeEntry.task_id,
+        Task.name.label('task_name'),
+        TimeEntry.project_id,
+        Project.name.label('project_name'),
+        func.sum(TimeEntry.duration_seconds).label('total_seconds')
+    ).join(
+        Project, Project.id == TimeEntry.project_id
+    ).outerjoin(
+        Task, Task.id == TimeEntry.task_id
+    ).filter(
+        TimeEntry.end_time.isnot(None),
+        func.date(TimeEntry.start_time) == target_date
+    )
+
+    # Scope to current user unless admin (with optional override)
+    if not current_user.is_admin:
+        query = query.filter(TimeEntry.user_id == current_user.id)
+    else:
+        user_id = request.args.get('user_id', type=int)
+        if user_id:
+            query = query.filter(TimeEntry.user_id == user_id)
+
+    results = query.group_by(
+        TimeEntry.task_id,
+        Task.name,
+        TimeEntry.project_id,
+        Project.name
+    ).order_by(func.sum(TimeEntry.duration_seconds).desc()).all()
+
+    rows = []
+    for task_id, task_name, project_id, project_name, total_seconds in results:
+        total_seconds = int(total_seconds or 0)
+        total_hours = round(total_seconds / 3600, 2)
+        label = f"{project_name} • {task_name}" if task_name else f"{project_name} • No task"
+        rows.append({
+            'task_id': task_id,
+            'task_name': task_name,
+            'project_id': project_id,
+            'project_name': project_name,
+            'total_seconds': total_seconds,
+            'total_hours': total_hours,
+            'label': label
+        })
+
+    return jsonify({
+        'date': target_date.strftime('%Y-%m-%d'),
+        'rows': rows
+    })

app/templates/main/dashboard.html

@@ -181,6 +181,24 @@
     </div>
 </div>
 
+<!-- Today by Task -->
+<div class="row section-spacing">
+    <div class="col-12">
+        <div class="card mobile-card hover-lift">
+            <div class="card-header d-flex align-items-center justify-content-between">
+                <h5 class="mb-0 d-flex align-items-center">
+                    <i class="fas fa-list-check me-3 text-secondary"></i>{{ _('Today by Task') }}
+                </h5>
+                <small class="text-muted" id="today-by-task-date"></small>
+            </div>
+            <div class="card-body" id="today-by-task">
+                <div class="text-muted">{{ _('Loading...') }}</div>
+            </div>
+        </div>
+    </div>
+    
+</div>
+
 <!-- Enhanced Recent Entries -->
 <div class="row">
     <div class="col-12">
@@ -366,7 +384,10 @@
     'choose_task': _('Choose a task...'),
     'please_select_project': _('Please select a project'),
     'starting': _('Starting...'),
-    'deleting': _('Deleting...')
+    'deleting': _('Deleting...'),
+    'today_by_task': _('Today by Task'),
+    'no_data': _('No time tracked yet today'),
+    'hours_suffix': _('h')
 }|tojson }}</script>
 <script>
     // Parse page i18n
@@ -448,6 +469,44 @@
         });
     }
 
+    // Fetch and render Today by Task
+    (function(){
+        const container = document.getElementById('today-by-task');
+        const dateEl = document.getElementById('today-by-task-date');
+        if (!container) return;
+        function renderRows(rows){
+            if (!rows || rows.length === 0) {
+                container.innerHTML = `<div class="text-muted">${i18nDash.no_data || 'No time tracked yet today'}</div>`;
+                return;
+            }
+            const list = document.createElement('div');
+            list.className = 'list-group list-group-flush';
+            rows.forEach(r => {
+                const item = document.createElement('div');
+                item.className = 'list-group-item d-flex justify-content-between align-items-center';
+                const left = document.createElement('div');
+                left.className = 'd-flex align-items-center';
+                left.innerHTML = `<div class="bg-secondary bg-opacity-10 rounded-circle d-flex align-items-center justify-content-center me-3" style="width:32px;height:32px;"><i class="fas fa-tasks text-secondary"></i></div><div><div class="fw-semibold">${(r.task_name ? r.project_name + ' • ' + r.task_name : r.project_name + ' • ' + (i18nDash.no_task || 'No task'))}</div></div>`;
+                const right = document.createElement('div');
+                right.className = 'badge bg-primary rounded-pill';
+                right.textContent = `${(r.total_hours ?? 0).toFixed(2)} ${(i18nDash.hours_suffix || 'h')}`;
+                item.appendChild(left);
+                item.appendChild(right);
+                list.appendChild(item);
+            });
+            container.innerHTML = '';
+            container.appendChild(list);
+        }
+        fetch('/api/analytics/today-by-task').then(r => r.json()).then(data => {
+            if (data && data.date) {
+                try { dateEl.textContent = new Date(data.date + 'T00:00:00').toLocaleDateString(); } catch(e) {}
+            }
+            renderRows((data && data.rows) || []);
+        }).catch(() => {
+            container.innerHTML = `<div class="text-muted">${i18nDash.no_data || 'No time tracked yet today'}</div>`;
+        });
+    })();
+
     // Validate start timer submission
     const startForm = document.querySelector('#startTimerModal form');
     if (startForm) {