Initial qiwei secondary development handoff

.gitignore

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+# Dependencies
+node_modules/
+frontend/node_modules/
+
+# Frontend build output
+frontend/dist/
+
+# Wails / build output
+build/bin/
+build/tmp/
+build/windows/installer/runtime/
+*.syso
+
+# Go cache and test output
+.gocache/
+*.test
+*.out
+coverage.out
+
+# Runtime data and logs
+Log/
+**/Log/
+*.log
+operations/*_operations.json
+config/client_status.json
+helper/config/client_status.json
+config/knowledge/embedding_index.json
+
+# Local/editor files
+.vscode/
+.idea/
+.DS_Store
+Thumbs.db
+
+# Keep release assets intentionally copied for handoff.
+!release/
+!release/**
+frontend/.npm-cache/
+frontend/**/.npm-cache/
+tools/**/.gocache*/
+helper/**/.gocache*/