chore(gitignore): ignore .DS_Store, .claude/, built helper bins

Broaden the existing `.claude/settings.local.json` rule to the whole
`.claude/` directory (Claude Code stores per-project session caches
there), and add `.DS_Store` plus the bin/ artifacts (`clx-prompt`,
`clx-prompt-slint`) compiled by build.sh from tracked source.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: snomiao

.gitignore

@@ -30,7 +30,7 @@ version-*.txt
 debug.log
 
 # claude
-.claude/settings.local.json
+.claude/
 
 #cache
 .eslintcache
@@ -62,3 +62,11 @@ test-results/
 tmp/
 rs/target-bootstrap/
 rs/target-v3/
+
+# macOS Finder metadata (anywhere in tree)
+.DS_Store
+
+# Built helper binaries (compiled by build.sh from rs/tools/clx-prompt-slint
+# and rs/adapters/macos/src/bin/). Source is tracked, artifacts are not.
+/bin/clx-prompt
+/bin/clx-prompt-slint