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2 commits

Author SHA1 Message Date
07fd7b1513
refactor: optimize rendering, log loading, and migrate to libssh callback API (#9)
This PR addresses critical performance bottlenecks, improves UX, and eliminates technical debt.

### Key Changes

**1. Performance Optimization:**
- **Startup**: Rewrote `message_load` to scan `messages.log` backwards from the end
  - Complexity reduced from O(FileSize) to O(MaxMessages)
  - Large log file startup: seconds → milliseconds
- **Rendering**: Optimized TUI rendering to use line clearing (`\033[K`) instead of full-screen clearing (`\033[2J`)
  - Eliminated visual flicker

**2. libssh API Migration:**
- Replaced deprecated message-based API with callback-based server implementation
- Removed `#pragma GCC diagnostic ignored "-Wdeprecated-declarations"`
- Ensures future libssh compatibility

**3. User Experience (Vim Mode):**
- Added `Ctrl+W` (Delete Word) and `Ctrl+U` (Delete Line) in Insert/Command modes
- Modified `Ctrl+C` behavior to safely switch modes instead of terminating connection
- Added support for `\n` as Enter key (fixing piped input issues)

**4. Project Structure:**
- Moved all test scripts to `tests/` directory
- Added `make test` target
- Updated CI/CD to run comprehensive test suite

### Verification
-  All tests passing (17/17)
-  CI passing on Ubuntu and macOS
-  AddressSanitizer clean
-  Valgrind clean (no memory leaks)
-  Zero compilation warnings

### Code Quality
**Rating:** 🟢 Good Taste
- Algorithm-driven optimization (not hacks)
- Simplified architecture (callback-based API)
- Zero breaking changes (all tests pass)
2026-02-07 23:17:55 +08:00
5f8b8fd843 feat: enhance anonymous access and long-term stability
Improvements for low-barrier anonymous access:
- Enhanced welcome message to clarify anonymous access
- Added EASY_SETUP.md guide in Chinese and English
- Updated README with anonymous access notes

Long-term stability enhancements:
- Improved systemd service with auto-restart and resource limits
- Added log rotation script (scripts/logrotate.sh)
- Added health check script (scripts/healthcheck.sh)
- Added cron setup script for automated maintenance
- Added anonymous access test suite

Testing:
- All security features verified (10/10 passed)
- Anonymous access tests passed (2/2)
- Health check verified

This ensures:
- Zero-barrier SSH access (any username, any password)
- Stable long-term operation with auto-restart
- Automated log management
- Continuous health monitoring
2026-01-22 15:06:54 +08:00