feat(tui): add character jump navigation (Ctrl+], Ctrl+Alt+]) (#1074)

Add Bash/Readline-style character search:

- Ctrl+] enters forward jump mode, awaits next character, jumps to it
- Ctrl+Alt+] does the same but searches backward
- Multi-line search
- Case-sensitive matching
- Pressing the hotkey again cancels; control chars cancel and fall
  through

packages/tui/src/components/editor.ts

@@ -196,6 +196,9 @@ export class Editor implements Component, Focusable {
 	private killRing: string[] = [];
 	private lastAction: "kill" | "yank" | "type-word" | null = null;
 
+	// Character jump mode
+	private jumpMode: "forward" | "backward" | null = null;
+
 	// Undo support
 	private undoStack: EditorState[] = [];
 
@@ -437,6 +440,26 @@ export class Editor implements Component, Focusable {
 	handleInput(data: string): void {
 		const kb = getEditorKeybindings();
 
+		// Handle character jump mode (awaiting next character to jump to)
+		if (this.jumpMode !== null) {
+			// Cancel if the hotkey is pressed again
+			if (kb.matches(data, "jumpForward") || kb.matches(data, "jumpBackward")) {
+				this.jumpMode = null;
+				return;
+			}
+
+			if (data.charCodeAt(0) >= 32) {
+				// Printable character - perform the jump
+				const direction = this.jumpMode;
+				this.jumpMode = null;
+				this.jumpToChar(data, direction);
+				return;
+			}
+
+			// Control character - cancel and fall through to normal handling
+			this.jumpMode = null;
+		}
+
 		// Handle bracketed paste mode
 		if (data.includes("\x1b[200~")) {
 			this.isInPaste = true;
@@ -678,6 +701,16 @@ export class Editor implements Component, Focusable {
 			return;
 		}
 
+		// Character jump mode triggers
+		if (kb.matches(data, "jumpForward")) {
+			this.jumpMode = "forward";
+			return;
+		}
+		if (kb.matches(data, "jumpBackward")) {
+			this.jumpMode = "backward";
+			return;
+		}
+
 		// Shift+Space - insert regular space
 		if (matchesKey(data, "shift+space")) {
 			this.insertCharacter(" ");
@@ -1664,6 +1697,40 @@ export class Editor implements Component, Focusable {
 		}
 	}
 
+	/**
+	 * Jump to the first occurrence of a character in the specified direction.
+	 * Multi-line search. Case-sensitive. Skips the current cursor position.
+	 */
+	private jumpToChar(char: string, direction: "forward" | "backward"): void {
+		this.lastAction = null;
+		const isForward = direction === "forward";
+		const lines = this.state.lines;
+
+		const end = isForward ? lines.length : -1;
+		const step = isForward ? 1 : -1;
+
+		for (let lineIdx = this.state.cursorLine; lineIdx !== end; lineIdx += step) {
+			const line = lines[lineIdx] || "";
+			const isCurrentLine = lineIdx === this.state.cursorLine;
+
+			// Current line: start after/before cursor; other lines: search full line
+			const searchFrom = isCurrentLine
+				? isForward
+					? this.state.cursorCol + 1
+					: this.state.cursorCol - 1
+				: undefined;
+
+			const idx = isForward ? line.indexOf(char, searchFrom) : line.lastIndexOf(char, searchFrom);
+
+			if (idx !== -1) {
+				this.state.cursorLine = lineIdx;
+				this.state.cursorCol = idx;
+				return;
+			}
+		}
+		// No match found - cursor stays in place
+	}
+
 	private moveWordForwards(): void {
 		this.lastAction = null;
 		const currentLine = this.state.lines[this.state.cursorLine] || "";

packages/tui/src/keybindings.ts

@@ -13,6 +13,8 @@ export type EditorAction =
 	| "cursorWordRight"
 	| "cursorLineStart"
 	| "cursorLineEnd"
+	| "jumpForward"
+	| "jumpBackward"
 	| "pageUp"
 	| "pageDown"
 	// Deletion
@@ -72,6 +74,8 @@ export const DEFAULT_EDITOR_KEYBINDINGS: Required<EditorKeybindingsConfig> = {
 	cursorWordRight: ["alt+right", "ctrl+right", "alt+f"],
 	cursorLineStart: ["home", "ctrl+a"],
 	cursorLineEnd: ["end", "ctrl+e"],
+	jumpForward: "ctrl+]",
+	jumpBackward: "ctrl+alt+]",
 	pageUp: "pageUp",
 	pageDown: "pageDown",
 	// Deletion