docs(changelog): backfill 1.0.2 and 1.0.3 release notes

docs(changelog): roll Unreleased entries into 1.0.4

chore(release): bump version to 1.0.4

Merge pull request #12 from shiwenwen/claude/plan-optimizations-KCXre

docs: update README project structure to reflect recent refactoring

chore: add generated Tauri linux schema

refactor: comprehensive codebase optimizations

chore(release): bump version to 1.0.3

Merge pull request #11 from shiwenwen/claude/update-project-rHcX6

i18n: replace all hardcoded UI strings with translation keys

refactor: split Settings page into focused sub-components

fix: resolve three code TODOs in core library

chore(release): bump version to 1.0.2

Merge pull request #10 from shiwenwen/claude/remove-skills-scan-sync-dsbzt

feat: add per-tool sync strategy with global fallback