TF-14: Add text search to tasks page

[Copilot]

Implements real-time text search for tasks with 100ms debouncing, case-insensitive partial matching, and URL state persistence.

Changes

New component: components/task-search.tsx

• Search input with magnifying glass icon
• Clear button (X) that appears when search has text
• Filter button placeholder (non-functional, deferred to st002)
• 100ms debounced URL updates via router.push()

Server-side filtering: app/(dashboard)/tasks/actions.ts

export async function getAllTasks(searchQuery?: string) {
  let tasks = await prisma.task.findMany({ /* ... */ });
  
  if (searchQuery) {
    const lowerQuery = searchQuery.toLowerCase();
    tasks = tasks.filter(task => 
      task.name.toLowerCase().includes(lowerQuery)
    );
  }
  
  return { tasks, error: null };
}

Note: In-memory filtering used instead of Prisma's mode: "insensitive" due to SQLite limitations.

Page integration: app/(dashboard)/tasks/page.tsx

• Accepts searchParams prop (Next.js 15 async pattern)
• Passes search query to getAllTasks()
• Renders <TaskSearch /> component

Behavior

• Search executes 100ms after user stops typing
• URL updates to /tasks?search=query (preserves state across refreshes)
• Clear button removes search param and shows all tasks
• Partial matching: "create" matches "Create automated workflow system"

Screenshots

Search UI with results

Initial state

Original prompt

---

This section details on the original issue you should resolve

<issue_title>TF-14 Basic Text Search for Tasks</issue_title>
<issue_description> Implement the work described in Jira ticket TF-14, including looking at any Figma files mentioned. When finished, transition the ticket to "In Reivew".

To do the work use the following prompt chain which describes steps for best implementing the feature:

1. Open the repository on GitHub: https://github.com/bitovi/ai-enablement-prompts.
2. Execute the prompt writing-code/generate-feature/generate-feature.md</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes TF-14 Basic Text Search for Tasks #259

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