v0.0.18: proper line editing in TUI input

Keyboard shortcuts:
- Left/Right: move cursor
- Home / Ctrl+A: beginning of line
- End / Ctrl+E: end of line
- Alt+Left/Right: word jump
- Alt+Backspace: delete word back
- Ctrl+W: delete word back
- Ctrl+U: clear entire line
- Ctrl+K: kill to end of line
- Delete: delete char at cursor
- Backspace: delete char before cursor

Cursor position tracked, chars insert at cursor (not just append).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

warzone/Cargo.toml

@@ -9,7 +9,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.0.17"
+version = "0.0.18"
 edition = "2021"
 license = "MIT"
 rust-version = "1.75"

warzone/crates/warzone-client/src/tui/app.rs

@@ -52,6 +52,7 @@ pub struct App {
     pub peer_fp: Option<String>,
     pub server_url: String,
     pub should_quit: bool,
+    pub cursor_pos: usize,
     pub last_dm_peer: Arc<Mutex<Option<String>>>,
     /// Track receipt status for messages we sent, keyed by message ID.
     pub receipts: Arc<Mutex<HashMap<String, ReceiptStatus>>>,
@@ -113,6 +114,7 @@ impl App {
             server_url,
             should_quit: false,
             last_dm_peer: Arc::new(Mutex::new(None)),
+            cursor_pos: 0,
             receipts: Arc::new(Mutex::new(HashMap::new())),
             pending_files: Arc::new(Mutex::new(HashMap::new())),
         }
@@ -227,7 +229,7 @@ impl App {
         frame.render_widget(input_widget, chunks[2]);
 
         // Cursor
-        let x = (self.input.len() as u16 + 1).min(chunks[2].width - 2);
+        let x = (self.cursor_pos as u16 + 1).min(chunks[2].width - 2);
         frame.set_cursor_position((chunks[2].x + x, chunks[2].y + 1));
     }
 
@@ -239,6 +241,7 @@ impl App {
     ) {
         let text = self.input.trim().to_string();
         self.input.clear();
+        self.cursor_pos = 0;
 
         if text.is_empty() {
             return;
@@ -1520,11 +1523,78 @@ pub async fn run_tui(
                     KeyCode::Char('c') if key.modifiers.contains(KeyModifiers::CONTROL) => {
                         app.should_quit = true;
                     }
-                    KeyCode::Backspace => {
-                        app.input.pop();
+                    // Alt+Backspace / Ctrl+W: delete word before cursor
+                    KeyCode::Backspace if key.modifiers.contains(KeyModifiers::ALT) => {
+                        if app.cursor_pos > 0 {
+                            let before = &app.input[..app.cursor_pos];
+                            let new_pos = before.trim_end().rfind(' ').map(|i| i + 1).unwrap_or(0);
+                            app.input.drain(new_pos..app.cursor_pos);
+                            app.cursor_pos = new_pos;
+                        }
                     }
+                    // Backspace: delete char before cursor
+                    KeyCode::Backspace => {
+                        if app.cursor_pos > 0 {
+                            app.input.remove(app.cursor_pos - 1);
+                            app.cursor_pos -= 1;
+                        }
+                    }
+                    // Delete: delete char at cursor
+                    KeyCode::Delete => {
+                        if app.cursor_pos < app.input.len() {
+                            app.input.remove(app.cursor_pos);
+                        }
+                    }
+                    // Left arrow
+                    KeyCode::Left => {
+                        if key.modifiers.contains(KeyModifiers::ALT) {
+                            // Alt+Left: word left
+                            let before = &app.input[..app.cursor_pos];
+                            app.cursor_pos = before.rfind(' ').map(|i| i).unwrap_or(0);
+                        } else if app.cursor_pos > 0 {
+                            app.cursor_pos -= 1;
+                        }
+                    }
+                    // Right arrow
+                    KeyCode::Right => {
+                        if key.modifiers.contains(KeyModifiers::ALT) {
+                            // Alt+Right: word right
+                            let after = &app.input[app.cursor_pos..];
+                            app.cursor_pos += after.find(' ').map(|i| i + 1).unwrap_or(after.len());
+                        } else if app.cursor_pos < app.input.len() {
+                            app.cursor_pos += 1;
+                        }
+                    }
+                    // Home / Ctrl+A
+                    KeyCode::Home => { app.cursor_pos = 0; }
+                    KeyCode::Char('a') if key.modifiers.contains(KeyModifiers::CONTROL) => {
+                        app.cursor_pos = 0;
+                    }
+                    // End / Ctrl+E
+                    KeyCode::End => { app.cursor_pos = app.input.len(); }
+                    KeyCode::Char('e') if key.modifiers.contains(KeyModifiers::CONTROL) => {
+                        app.cursor_pos = app.input.len();
+                    }
+                    // Ctrl+U: clear line
+                    KeyCode::Char('u') if key.modifiers.contains(KeyModifiers::CONTROL) => {
+                        app.input.clear();
+                        app.cursor_pos = 0;
+                    }
+                    // Ctrl+K: kill to end of line
+                    KeyCode::Char('k') if key.modifiers.contains(KeyModifiers::CONTROL) => {
+                        app.input.truncate(app.cursor_pos);
+                    }
+                    // Ctrl+W: delete word back
+                    KeyCode::Char('w') if key.modifiers.contains(KeyModifiers::CONTROL) => {
+                        let before = &app.input[..app.cursor_pos];
+                        let new_pos = before.trim_end().rfind(' ').map(|i| i + 1).unwrap_or(0);
+                        app.input.drain(new_pos..app.cursor_pos);
+                        app.cursor_pos = new_pos;
+                    }
+                    // Regular char: insert at cursor
                     KeyCode::Char(c) => {
-                        app.input.push(c);
+                        app.input.insert(app.cursor_pos, c);
+                        app.cursor_pos += 1;
                     }
                     KeyCode::Esc => {
                         app.should_quit = true;