Add search filter for prompts by title

[Copilot]

Implements PLAY-80: Add real-time search filtering to the prompts list.

Changes

• Search input with icon and placeholder in PromptsList.tsx
• Case-insensitive filtering on prompt names using toLowerCase().includes()
• Dynamic count display showing "X of Y" when actively filtering
• Contextual empty state differentiating "no prompts" from "no search results"

Implementation

const [searchQuery, setSearchQuery] = useState('');
const filteredPrompts = promptList.filter((prompt) =>
  prompt.name.toLowerCase().includes(searchQuery.toLowerCase())
);

Search input positioned above the prompts grid with left-aligned search icon using existing UI components (Input, Search from lucide-react).

Screenshots

All prompts visible:

Filtered by "jira" (1 of 3):

No results state:

Original prompt

---

This section details on the original issue you should resolve

<issue_title>PLAY-80 st001` Search Tasks by Title</issue_title>
<issue_description> Implement the work described in Jira ticket PLAY-80, 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 PLAY-80 st001` **Search Tasks by Title** #45

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