Rename .js to .mjs, extract helpers module

Move resolvePath and exec out of index.mjs into server/helpers.mjs so
actions can import them directly rather than receiving them as arguments.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server/actions.mjs

@@ -0,0 +1,63 @@
+// Action registry — defines all available actions, their parameters, and policies.
+// policy: "auto-accept" | "auto-deny" | "queue"
+
+import { resolvePath, exec } from "./helpers.mjs";
+
+export const actions = {
+	"list-actions": {
+		description: "List all available actions and their definitions",
+		params: [],
+		policy: "auto-accept",
+		handler: async () => {
+			return Object.entries(actions).map(([name, def]) => ({
+				action: name,
+				description: def.description,
+				params: def.params,
+				policy: def.policy,
+			}));
+		},
+	},
+
+	"edit-file": {
+		description: "Open a file in the editor",
+		params: [{ name: "filename", required: true, type: "path" }],
+		policy: "auto-accept",
+		handler: async ({ filename }) => {
+			const resolved = resolvePath(filename);
+			await exec("xdg-open", [resolved]);
+			return { opened: resolved };
+		},
+	},
+
+	"open-directory": {
+		description: "Open a directory in the file manager",
+		params: [{ name: "path", required: true, type: "path" }],
+		policy: "auto-accept",
+		handler: async ({ path }) => {
+			const resolved = resolvePath(path);
+			await exec("xdg-open", [resolved]);
+			return { opened: resolved };
+		},
+	},
+
+	"open-browser": {
+		description: "Open a URL in the web browser",
+		params: [{ name: "url", required: true, type: "string" }],
+		policy: "queue",
+		handler: async ({ url }) => {
+			await exec("xdg-open", [url]);
+			return { opened: url };
+		},
+	},
+
+	"open-terminal": {
+		description: "Open a terminal in a given directory",
+		params: [{ name: "path", required: false, type: "path" }],
+		policy: "queue",
+		handler: async ({ path }) => {
+			const resolved = path ? resolvePath(path) : process.env.HOME;
+			await exec("xdg-open", [resolved]);
+			return { opened: resolved };
+		},
+	},
+};