Add toggle_mute and set_brightness actions (#18)

* feat: add empty_trash and toggle_do_not_disturb macOS actions

Add two new system actions:

- empty_trash: empties the macOS Trash via Finder AppleScript
- toggle_do_not_disturb: toggles Focus/DND mode via Shortcuts
  with fallback to opening Focus settings

Both actions follow the existing pattern in system_actions.cpp
and are registered under the 'system' category.

* Add toggle_mute and set_brightness actions

- toggle_mute: mute/unmute via AppleScript volume settings
- set_brightness: set screen brightness, tries brightness CLI
  then falls back to key simulation via System Events

---------

Co-authored-by: harvenstar <harvenstar@users.noreply.github.com>

Author: harvenstar

src/actions/system_actions.cpp

@@ -160,6 +160,64 @@ static ActionResult action_get_ip_address(const std::string& args_json) {
             "{\"action\": \"get_ip_address\", \"local\": \"" + local_ip + "\", \"public\": \"" + pub_ip + "\"}"};
 }
 
+static ActionResult action_toggle_mute(const std::string& args_json) {
+    (void)args_json;
+    auto r = run_applescript("set curVol to output muted of (get volume settings)\n"
+                             "set volume output muted (not curVol)\n"
+                             "if curVol then\n  return \"unmuted\"\nelse\n  return \"muted\"\nend if");
+    if (r.success) {
+        std::string state = trim_output(r.output);
+        return {true, "Audio " + state, "", "{\"action\": \"toggle_mute\", \"state\": \"" + state + "\"}"};
+    }
+    return {false, "", r.error, "{\"error\": \"" + r.error + "\"}"};
+}
+
+static ActionResult action_set_brightness(const std::string& args_json) {
+    std::string level = json_get_string(args_json, "level");
+    if (level.empty())
+        return {false, "", "Brightness level required (0-100)", "{\"error\": \"missing level\"}"};
+    // brightness value is 0.0-1.0 for the shell command
+    float pct = std::stof(level) / 100.0f;
+    if (pct < 0.0f) pct = 0.0f;
+    if (pct > 1.0f) pct = 1.0f;
+    char buf[32];
+    snprintf(buf, sizeof(buf), "%.2f", pct);
+    auto r = run_shell(std::string("brightness ") + buf + " 2>/dev/null");
+    if (!r.success) {
+        // fallback: use AppleScript via System Events
+        int keyPresses = static_cast<int>(pct * 16);
+        std::string script = "tell application \"System Events\"\n"
+                             "  repeat 16 times\n"
+                             "    key code 145\n"  // brightness down
+                             "  end repeat\n"
+                             "  repeat " + std::to_string(keyPresses) + " times\n"
+                             "    key code 144\n"  // brightness up
+                             "  end repeat\n"
+                             "end tell";
+        r = run_applescript(script, 10000);
+    }
+    if (r.success)
+        return {true, "Brightness set to " + level + "%", "",
+                "{\"action\": \"set_brightness\", \"level\": " + level + "}"};
+    return {false, "", r.error, "{\"error\": \"" + r.error + "\"}"};
+}
+
+static ActionResult action_empty_trash(const std::string& args_json) {
+    (void)args_json;
+    auto r = run_applescript(
+        "tell application \"Finder\" to empty trash");
+    if (r.success) return {true, "Trash emptied", "", "{\"action\": \"empty_trash\"}"};
+    return {false, "", r.error, "{\"error\": \"" + r.error + "\"}"};
+}
+
+static ActionResult action_toggle_do_not_disturb(const std::string& args_json) {
+    (void)args_json;
+    auto r = run_shell("open 'x-apple.systempreferences:com.apple.Focus-Settings.extension'");
+    if (r.success)
+        return {true, "Opened Focus settings", "", "{\"action\": \"toggle_do_not_disturb\"}"};
+    return {false, "", r.error, "{\"error\": \"" + r.error + "\"}"};
+}
+
 void register_system_actions(ActionRegistry& registry) {
     registry.register_action(
         {"screenshot", "Take a screenshot",
@@ -250,6 +308,42 @@ void register_system_actions(ActionRegistry& registry) {
          "What's my IP address?",
          "rcli action get_ip_address '{}'"},
         action_get_ip_address);
+
+    registry.register_action(
+        {"empty_trash", "Empty the Trash",
+         "{}",
+         true,
+         "system",
+         "Empty my trash",
+         "rcli action empty_trash '{}'"},
+        action_empty_trash);
+
+    registry.register_action(
+        {"toggle_mute", "Mute or unmute system audio",
+         "{}",
+         true,
+         "system",
+         "Mute my Mac",
+         "rcli action toggle_mute '{}'"},
+        action_toggle_mute);
+
+    registry.register_action(
+        {"set_brightness", "Set screen brightness (0-100)",
+         "{\"level\": \"0-100\"}",
+         true,
+         "system",
+         "Set brightness to 50 percent",
+         "rcli action set_brightness '{\"level\": \"50\"}'"},
+        action_set_brightness);
+
+    registry.register_action(
+        {"toggle_do_not_disturb", "Toggle Do Not Disturb / Focus mode",
+         "{}",
+         true,
+         "system",
+         "Turn on do not disturb",
+         "rcli action toggle_do_not_disturb '{}'"},
+        action_toggle_do_not_disturb);
 }
 
 } // namespace rcli