feat: fuzzy file search with @ prefix

- Type @ to fuzzy-search files/folders across project
- Respects .gitignore and skips hidden files
- Pure Node.js implementation using readdir with withFileTypes
- No external dependencies (fd/find) required
- Also optimized Tab completion to use withFileTypes instead of statSync

Based on PR #60 by @fightbulc, reimplemented for performance.

packages/coding-agent/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Added
+
+- **Fuzzy File Search (`@`)**: Type `@` followed by a search term to fuzzy-search files and folders across your project. Respects `.gitignore` and skips hidden files. Directories are prioritized in results. Based on [PR #60](https://github.com/badlogic/pi-mono/pull/60) by [@fightbulc](https://github.com/fightbulc), reimplemented with pure Node.js for fast, dependency-free searching.
+
 ### Fixed
 
 - **Emoji Text Wrapping Crash**: Fixed crash when rendering text containing emojis (e.g., 😂) followed by long content like URLs. The `breakLongWord` function in `pi-tui` was iterating over UTF-16 code units instead of grapheme clusters, causing emojis (which are surrogate pairs) to be miscounted during line wrapping. Now uses `Intl.Segmenter` to properly handle multi-codepoint characters.

packages/coding-agent/README.md

@@ -469,9 +469,8 @@ Type **`@`** to fuzzy-search for files and folders in your project:
 - Directories are prioritized and shown with trailing `/`
 - Autocomplete triggers immediately when you type `@`
 - Use **Up/Down arrows** to navigate, **Tab**/**Enter** to select
-- Only shows attachable files (text, code, images) and directories
 
-Uses `fdfind`/`fd` for fast searching if available, falls back to `find` on all Unix systems.
+Respects `.gitignore` files and skips hidden files/directories.
 
 ### Path Completion