Enable Project categorization.

templates/create_project.html

@@ -40,6 +40,19 @@
                     {% endfor %}
                 </select>
             </div>
+            
+            <div class="form-group">
+                <label for="category_id">Project Category</label>
+                <select id="category_id" name="category_id">
+                    <option value="">No Category</option>
+                    {% for category in categories %}
+                    <option value="{{ category.id }}" 
+                            {% if request.form.category_id and request.form.category_id|int == category.id %}selected{% endif %}>
+                        {{ category.icon or '📁' }} {{ category.name }}
+                    </option>
+                    {% endfor %}
+                </select>
+            </div>
         </div>
         
         <div class="form-row">