Add ratatui based TUI as default interactive mode

CLAUDE.md

@@ -0,0 +1,48 @@
+# Tycode - Claude Code Guidelines
+
+## Git Remotes & Sync Flow
+
+This repo has two remotes:
+- **origin** (tigy32/Tycode) - the original upstream repo
+- **fork** (k29/Tycode) - our fork
+
+Our fork should stay synced with upstream. **Always prompt the user to sync before starting work.**
+
+### Sync fork with upstream:
+```
+git fetch origin
+git rebase origin/main
+git push fork main
+```
+
+### For new feature work:
+1. Sync main first (see above)
+2. `git checkout -b feature/xyz`
+3. Work on it, push to fork: `git push fork feature/xyz`
+4. When ready, merge into main or open a PR to upstream
+
+### Quick sync (no local changes):
+```
+git pull origin main --ff-only
+git push fork main
+```
+
+Use `--ff-only` to ensure fast-forward only, never merge commits. Keep history linear.
+
+### Updating feature branches after changes on main
+
+When a commit on `main` relates to an open PR's feature branch, update that branch so the PR stays current. The feature branch should contain **only its own commits** on top of `origin/main` (no unrelated commits like plugin system changes).
+
+```
+git checkout feature/xyz
+git reset --hard origin/main
+git cherry-pick <relevant-commit-hashes>   # only the commits for this feature
+cargo build -p tycode-cli                   # verify it builds
+git push fork feature/xyz --force-with-lease
+git checkout main
+```
+
+**Active feature branches & PRs:**
+| Branch | PR | Description |
+|--------|----|-------------|
+| `feature/tui` | #38 | Ratatui-based TUI |

tycode-cli/Cargo.toml

@@ -37,3 +37,9 @@ serde = { workspace = true }
 serde_json = { workspace = true }
 similar = "2.4"
 
+# TUI dependencies
+ratatui = "0.29"
+crossterm = { version = "0.28", features = ["event-stream"] }
+tui-textarea = "0.7"
+futures = "0.3"
+

tycode-cli/src/main.rs

@@ -14,8 +14,10 @@ mod commands;
 mod github;
 mod interactive_app;
 mod state;
+mod tui;
 
 use crate::interactive_app::InteractiveApp;
+use crate::tui::TuiApp;
 
 #[derive(Parser, Debug)]
 #[command(name = "tycode-cli")]
@@ -49,6 +51,10 @@ struct Args {
     /// Task description for auto mode
     #[arg(long)]
     task: Option<String>,
+
+    /// Disable TUI and use legacy line-based interactive mode
+    #[arg(long)]
+    no_tui: bool,
 }
 
 fn main() -> Result<()> {
@@ -100,8 +106,13 @@ async fn async_main() -> Result<()> {
         return auto::run_auto(args.task.unwrap(), roots, args.profile, args.compact).await;
     }
 
-    let mut app = InteractiveApp::new(workspace_roots, args.profile, args.compact).await?;
-    app.run().await?;
+    if args.no_tui {
+        let mut app = InteractiveApp::new(workspace_roots, args.profile, args.compact).await?;
+        app.run().await?;
+    } else {
+        let mut tui_app = TuiApp::new(workspace_roots, args.profile).await?;
+        tui_app.run().await?;
+    }
 
     Ok(())
 }