Add task search (vibe-kanban) (#48)

* Perfect! I've successfully added search functionality to the TaskKanbanBoard component. The implementation includes:

1. **Search input field** at the top of the kanban board
2. **Real-time filtering** that searches both task titles and descriptions
3. **Case-insensitive search** for better user experience
4. **Clean integration** with the existing kanban board structure

The search functionality works by filtering tasks before they're grouped by status, so only matching tasks will appear on the board across all columns.

* Perfect! I've successfully moved the search input to the header, positioning it to the left of the "Add Task" button. The improvements include:

1. **Better positioning**: Search input is now in the header alongside the "Add Task" button
2. **Improved layout**: The search input has a fixed width (w-64) and is properly spaced
3. **Clean integration**: The search functionality is maintained while improving the visual hierarchy
4. **Responsive design**: The search input is grouped with the "Add Task" button for better visual balance

The search functionality remains the same - it filters tasks by title and description in real-time as you type.

* Prettier

frontend/src/components/tasks/TaskKanbanBoard.tsx

@@ -12,6 +12,7 @@ type Task = TaskWithAttemptStatus;
 
 interface TaskKanbanBoardProps {
   tasks: Task[];
+  searchQuery?: string;
   onDragEnd: (event: DragEndEvent) => void;
   onEditTask: (task: Task) => void;
   onDeleteTask: (taskId: string) => void;
@@ -44,11 +45,25 @@ const statusBoardColors: Record<TaskStatus, string> = {
 
 export function TaskKanbanBoard({
   tasks,
+  searchQuery = '',
   onDragEnd,
   onEditTask,
   onDeleteTask,
   onViewTaskDetails,
 }: TaskKanbanBoardProps) {
+  const filterTasks = (tasks: Task[]) => {
+    if (!searchQuery.trim()) {
+      return tasks;
+    }
+
+    const query = searchQuery.toLowerCase();
+    return tasks.filter(
+      (task) =>
+        task.title.toLowerCase().includes(query) ||
+        (task.description && task.description.toLowerCase().includes(query))
+    );
+  };
+
   const groupTasksByStatus = () => {
     const groups: Record<TaskStatus, Task[]> = {} as Record<TaskStatus, Task[]>;
 
@@ -57,7 +72,9 @@ export function TaskKanbanBoard({
       groups[status] = [];
     });
 
-    tasks.forEach((task) => {
+    const filteredTasks = filterTasks(tasks);
+
+    filteredTasks.forEach((task) => {
       // Convert old capitalized status to lowercase if needed
       const normalizedStatus = task.status.toLowerCase() as TaskStatus;
       if (groups[normalizedStatus]) {

frontend/src/pages/project-tasks.tsx

@@ -2,6 +2,7 @@ import { useState, useEffect, useCallback } from 'react';
 import { useParams, useNavigate } from 'react-router-dom';
 import { Button } from '@/components/ui/button';
 import { Card, CardContent } from '@/components/ui/card';
+import { Input } from '@/components/ui/input';
 import { Plus, Settings, FolderOpen } from 'lucide-react';
 import { makeRequest } from '@/lib/api';
 import { TaskFormDialog } from '@/components/tasks/TaskFormDialog';
@@ -44,6 +45,7 @@ export function ProjectTasks() {
   const [isTaskDialogOpen, setIsTaskDialogOpen] = useState(false);
   const [editingTask, setEditingTask] = useState<Task | null>(null);
   const [isProjectSettingsOpen, setIsProjectSettingsOpen] = useState(false);
+  const [searchQuery, setSearchQuery] = useState('');
 
   // Panel state
   const [selectedTask, setSelectedTask] = useState<Task | null>(null);
@@ -402,10 +404,19 @@ export function ProjectTasks() {
               <Settings className="h-4 w-4" />
             </Button>
           </div>
-          <Button onClick={handleCreateNewTask}>
-            <Plus className="h-4 w-4 mr-2" />
-            Add Task
-          </Button>
+          <div className="flex items-center gap-3">
+            <Input
+              type="text"
+              placeholder="Search tasks..."
+              value={searchQuery}
+              onChange={(e) => setSearchQuery(e.target.value)}
+              className="w-64"
+            />
+            <Button onClick={handleCreateNewTask}>
+              <Plus className="h-4 w-4 mr-2" />
+              Add Task
+            </Button>
+          </div>
         </div>
 
         {/* Tasks View */}
@@ -428,6 +439,7 @@ export function ProjectTasks() {
             <div className="min-w-[900px] max-w-[2000px] relative py-1">
               <TaskKanbanBoard
                 tasks={tasks}
+                searchQuery={searchQuery}
                 onDragEnd={handleDragEnd}
                 onEditTask={handleEditTask}
                 onDeleteTask={handleDeleteTask}