Fix work history filter — add validation, explicit form action, and visual feedback

- Add explicit action="{% url 'work_history' %}" to filter form (prevents
  potential URL mismatch on Flatlogic proxy)
- Add numeric validation for worker/project GET params (prevents 500 errors)
- Add results counter: "Showing X of Y work logs" when filters are active
- Add active filter badges showing worker name, project name, and status
- Add green left border indicator on filter card when filters are active
- Make Clear button conditional (red, only appears with active filters)
- Add SQLite dev toggle in settings.py for local testing without MariaDB

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

config/settings.py

@@ -200,3 +200,19 @@ from django.contrib.messages import constants as message_constants
 MESSAGE_TAGS = {
     message_constants.ERROR: 'danger',
 }
+
+# === LOCAL DEVELOPMENT: SQLite override ===
+# Set USE_SQLITE=true in environment to use SQLite instead of MariaDB.
+# This lets you test locally without a MySQL/MariaDB server.
+if os.getenv('USE_SQLITE', 'false').lower() == 'true':
+    DATABASES = {
+        'default': {
+            'ENGINE': 'django.db.backends.sqlite3',
+            'NAME': BASE_DIR / 'db.sqlite3',
+        }
+    }
+    # Disable secure cookies for local http:// testing
+    SESSION_COOKIE_SECURE = False
+    CSRF_COOKIE_SECURE = False
+    SESSION_COOKIE_SAMESITE = 'Lax'
+    CSRF_COOKIE_SAMESITE = 'Lax'

core/templates/core/work_history.html

@@ -40,9 +40,9 @@
     </div>
 
     {# === FILTER BAR === #}
-    <div class="card shadow-sm border-0 mb-4">
+    <div class="card shadow-sm border-0 mb-4{% if has_active_filters %} border-start border-3{% endif %}" {% if has_active_filters %}style="border-left-color: var(--accent, #10b981) !important;"{% endif %}>
         <div class="card-body py-3">
-            <form method="GET" class="row g-2 align-items-end">
+            <form method="GET" action="{% url 'work_history' %}" class="row g-2 align-items-end">
                 {# Preserve current view mode when filtering #}
                 <input type="hidden" name="view" value="{{ view_mode }}">
                 {% if view_mode == 'calendar' %}
@@ -87,16 +87,48 @@
                     </select>
                 </div>
 
-                {# Filter Button #}
+                {# Filter + Clear Buttons #}
                 <div class="col-md-3 d-flex gap-2">
                     <button type="submit" class="btn btn-sm btn-accent">
                         <i class="fas fa-filter me-1"></i> Filter
                     </button>
-                    <a href="{% url 'work_history' %}?view={{ view_mode }}" class="btn btn-sm btn-outline-secondary">
+                    {% if has_active_filters %}
+                    <a href="{% url 'work_history' %}?view={{ view_mode }}" class="btn btn-sm btn-outline-danger">
                         <i class="fas fa-times me-1"></i> Clear
                     </a>
+                    {% endif %}
                 </div>
             </form>
+
+            {# === Active Filter Feedback === #}
+            {# Shows a results counter when filters are active so the user can see the filter is working #}
+            {% if has_active_filters %}
+            <div class="mt-2 d-flex align-items-center flex-wrap gap-2">
+                <small class="text-muted">
+                    <i class="fas fa-info-circle me-1"></i>
+                    Showing <strong>{{ filtered_log_count }}</strong> of {{ total_log_count }} work log{{ total_log_count|pluralize }}
+                </small>
+                {# Show which filters are active as small badges #}
+                {% if selected_worker %}
+                <span class="badge bg-primary bg-opacity-10 text-primary border border-primary border-opacity-25">
+                    <i class="fas fa-user fa-xs me-1"></i>
+                    {% for w in filter_workers %}{% if w.id|stringformat:"d" == selected_worker %}{{ w.name }}{% endif %}{% endfor %}
+                </span>
+                {% endif %}
+                {% if selected_project %}
+                <span class="badge bg-success bg-opacity-10 text-success border border-success border-opacity-25">
+                    <i class="fas fa-project-diagram fa-xs me-1"></i>
+                    {% for p in filter_projects %}{% if p.id|stringformat:"d" == selected_project %}{{ p.name }}{% endif %}{% endfor %}
+                </span>
+                {% endif %}
+                {% if selected_status %}
+                <span class="badge bg-warning bg-opacity-10 text-dark border border-warning border-opacity-25">
+                    <i class="fas fa-tag fa-xs me-1"></i>
+                    {{ selected_status|capfirst }}
+                </span>
+                {% endif %}
+            </div>
+            {% endif %}
         </div>
     </div>
 

core/views.py

@@ -375,11 +375,25 @@ def work_history(request):
         ).distinct()
 
     # --- Filters ---
-    # Read filter values from the URL query string
+    # Read filter values from the URL query string.
+    # Validate numeric params to prevent 500 errors from bad/malformed URLs.
     worker_filter = request.GET.get('worker', '')
     project_filter = request.GET.get('project', '')
     status_filter = request.GET.get('status', '')
 
+    # Validate: worker and project must be numeric IDs (or empty)
+    try:
+        worker_filter = str(int(worker_filter)) if worker_filter else ''
+    except (ValueError, TypeError):
+        worker_filter = ''
+    try:
+        project_filter = str(int(project_filter)) if project_filter else ''
+    except (ValueError, TypeError):
+        project_filter = ''
+
+    # Count total logs BEFORE filtering (so we can show "X of Y" to the user)
+    total_log_count = logs.count()
+
     if worker_filter:
         logs = logs.filter(workers__id=worker_filter).distinct()
 
@@ -393,6 +407,12 @@ def work_history(request):
         # "Unpaid" = has no PayrollRecord linked
         logs = logs.filter(payroll_records__isnull=True)
 
+    # Track whether any filter is active (for showing feedback in the template)
+    has_active_filters = bool(worker_filter or project_filter or status_filter)
+
+    # Count filtered results BEFORE adding joins (more efficient SQL)
+    filtered_log_count = logs.count() if has_active_filters else 0
+
     # Add related data and order by date (newest first)
     logs = logs.select_related(
         'project', 'supervisor'
@@ -435,6 +455,9 @@ def work_history(request):
         'is_admin': is_admin(user),
         'view_mode': view_mode,
         'filter_params': filter_params,
+        'has_active_filters': has_active_filters,
+        'total_log_count': total_log_count,
+        'filtered_log_count': filtered_log_count,
     }
 
     # === CALENDAR MODE ===