feat: land native mobile foundation

CHANGELOG.md

@@ -0,0 +1,52 @@
+# Changelog
+
+All notable Hermes Mobile source changes are recorded here. Entries are added during the same work loop as their implementation; release artifacts are only listed after source commit, checks, and APK upload are verified.
+
+## Unreleased
+
+### Added
+- Added native Android chat, workspace, settings, local defaults, companion health, and file editing surfaces for the beta client.
+- Added `PROJECT_PLAN.md` as the project-controlled milestone plan.
+
+### Changed
+- Updated companion `/api/chat` to call `hermes chat -Q --source tool -q <prompt>`, sanitize CLI banners/help/control output, truncate large mobile replies, and return structured failures.
+- Reconciled `docs/ROADMAP.md` to the current native Android beta state.
+- Ignored `.gradle-user/` and `.dev/` alongside existing generated build artifacts.
+
+### Fixed
+- Fixed companion/mobile lint issues from missing Node globals and an unused React settings value.
+
+### Verification
+- `git diff --check` — passed
+- `npm run typecheck --workspace @hermes-mobile/companion` — passed
+- `npm run lint --workspace @hermes-mobile/companion` — passed
+- `npm run build --workspace @hermes-mobile/companion` — passed
+- `npm run typecheck` — passed
+- `npm run lint` — passed
+- `npm run build` — passed
+- `GRADLE_USER_HOME=/root/hermes-mobile/.gradle-user ./gradlew :app:assembleDebug` from `apps/mobile/android` — blocked before compilation: network socket creation is not permitted while downloading Gradle 8.11.1
+
+## Release history
+
+_No versioned APK releases yet._
+
+## Entry format
+
+```markdown
+## [v0.1.0-beta.1] - YYYY-MM-DD
+
+### Added
+- Concise user-visible change.
+
+### Changed
+- Concise refinement or architectural change.
+
+### Fixed
+- Concise defect fix.
+
+### Verification
+- `command` — passed
+
+### APK
+- `hermes-mobile-v0.1.0-beta.1.apk` — Telegram release topic message <id>
+```