feat(coding-agent): configurable double-escape action (tree vs branch)

Add doubleEscapeAction setting to choose whether double-escape with an
empty editor opens /tree (default) or /branch.

- Add setting to Settings interface and SettingsManager
- Add to /settings UI for easy toggling
- Update interactive-mode to respect the setting
- Document in README.md settings table

fixes #404

packages/coding-agent/src/modes/interactive/components/settings-selector.ts

@@ -33,6 +33,7 @@ export interface SettingsConfig {
 	availableThemes: string[];
 	hideThinkingBlock: boolean;
 	collapseChangelog: boolean;
+	doubleEscapeAction: "branch" | "tree";
 }
 
 export interface SettingsCallbacks {
@@ -46,6 +47,7 @@ export interface SettingsCallbacks {
 	onThemePreview?: (theme: string) => void;
 	onHideThinkingBlockChange: (hidden: boolean) => void;
 	onCollapseChangelogChange: (collapsed: boolean) => void;
+	onDoubleEscapeActionChange: (action: "branch" | "tree") => void;
 	onCancel: () => void;
 }
 
@@ -160,6 +162,13 @@ export class SettingsSelectorComponent extends Container {
 				currentValue: config.collapseChangelog ? "true" : "false",
 				values: ["true", "false"],
 			},
+			{
+				id: "double-escape-action",
+				label: "Double-escape action",
+				description: "Action when pressing Escape twice with empty editor",
+				currentValue: config.doubleEscapeAction,
+				values: ["tree", "branch"],
+			},
 			{
 				id: "thinking",
 				label: "Thinking level",
@@ -264,6 +273,9 @@ export class SettingsSelectorComponent extends Container {
 					case "collapse-changelog":
 						callbacks.onCollapseChangelogChange(newValue === "true");
 						break;
+					case "double-escape-action":
+						callbacks.onDoubleEscapeActionChange(newValue as "branch" | "tree");
+						break;
 				}
 			},
 			callbacks.onCancel,

packages/coding-agent/src/modes/interactive/interactive-mode.ts

@@ -755,10 +755,14 @@ export class InteractiveMode {
 				this.isBashMode = false;
 				this.updateEditorBorderColor();
 			} else if (!this.editor.getText().trim()) {
-				// Double-escape with empty editor triggers /branch
+				// Double-escape with empty editor triggers /tree or /branch based on setting
 				const now = Date.now();
 				if (now - this.lastEscapeTime < 500) {
-					this.showUserMessageSelector();
+					if (this.settingsManager.getDoubleEscapeAction() === "tree") {
+						this.showTreeSelector();
+					} else {
+						this.showUserMessageSelector();
+					}
 					this.lastEscapeTime = 0;
 				} else {
 					this.lastEscapeTime = now;
@@ -1682,6 +1686,7 @@ export class InteractiveMode {
 					availableThemes: getAvailableThemes(),
 					hideThinkingBlock: this.hideThinkingBlock,
 					collapseChangelog: this.settingsManager.getCollapseChangelog(),
+					doubleEscapeAction: this.settingsManager.getDoubleEscapeAction(),
 				},
 				{
 					onAutoCompactChange: (enabled) => {
@@ -1739,6 +1744,9 @@ export class InteractiveMode {
 					onCollapseChangelogChange: (collapsed) => {
 						this.settingsManager.setCollapseChangelog(collapsed);
 					},
+					onDoubleEscapeActionChange: (action) => {
+						this.settingsManager.setDoubleEscapeAction(action);
+					},
 					onCancel: () => {
 						done();
 						this.ui.requestRender();