feat: add undo action and fix hotkeys rendering (#438)

* Fix prompt action undo and hotkeys rendering

* Fix prompt action test typechecks

* Simplify undo and hotkeys PR

* Fix editor formatting

packages/coding-agent/test/modes/controllers/command-controller-hotkeys.test.ts

@@ -0,0 +1,25 @@
+import { describe, expect, it } from "bun:test";
+import { buildHotkeysMarkdown } from "../../../src/modes/utils/hotkeys-markdown";
+
+describe("buildHotkeysMarkdown", () => {
+	it("emits flush-left markdown so headings and tables are parsed instead of treated as indented text", () => {
+		const markdown = buildHotkeysMarkdown({
+			expandToolsKey: "Ctrl+O",
+			planModeKey: "Alt+M",
+			sttKey: "Alt+H",
+			copyLineKey: "Alt+Shift+L",
+			copyPromptKey: "Ctrl+Shift+P",
+		});
+
+		const lines = markdown.split("\n");
+		expect(lines[0]).toBe("**Navigation**");
+		expect(markdown).toContain("| `Ctrl+Shift+P` | Copy whole prompt |");
+		expect(markdown).toContain("| `Alt+M` | Toggle plan mode |");
+		expect(markdown).toContain("| `#` | Open prompt actions |");
+		for (const line of lines) {
+			if (line.length === 0) continue;
+			expect(line.startsWith(" ")).toBe(false);
+			expect(line.startsWith("\t")).toBe(false);
+		}
+	});
+});