TNT/TODO.md
m1ngsama 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

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Markdown

# TODO
## Maintenance
- [x] Replace deprecated `libssh` functions in `src/ssh_server.c`:
- ~~`ssh_message_auth_password`~~ → `auth_password_function` callback (✓ completed)
- ~~`ssh_message_channel_request_pty_width/height`~~ → `channel_pty_request_function` callback (✓ completed)
- Migrated to callback-based server API as of libssh 0.9+
## Future Features
- [x] Implement robust command handling for non-interactive SSH exec requests.
- Basic exec support completed (handles `exit` command)
- All tests passing