add quicklaunch (Dolphin, Firefox)

README.md

@@ -5,7 +5,7 @@ A bottom desktop-environment panel for wlroots-based compositors, built on
 
 | Section | Contents                                                          |
 | ------- | ----------------------------------------------------------------- |
-| Left    | Application menu built from `.desktop` entries, with search        |
+| Left    | Application menu built from `.desktop` entries, with search, and pinned quick-launch icons |
 | Middle  | Open windows (task list), click to focus, middle-click to close    |
 | Right   | On-screen keyboard, wifi, bluetooth, and a session menu: log out, suspend, restart, shut down |
 
@@ -122,6 +122,12 @@ The launcher is a full-screen overlay layer surface rather than an
 `xdg-popup`, which is what makes click-away dismissal and keyboard focus work on
 any wlroots compositor without compositor-specific focus grabs.
 
+**Quick launch.** The ids in `quickLaunch` are pinned as icons next to the app
+menu, in the order listed, and clicking one launches that entry exactly as the
+menu would — field codes stripped, `Terminal=true` honoured, and its own systemd
+scope when the panel is a unit. An id that is not installed is skipped rather
+than left as a dead button, so the same list can be carried between machines.
+
 **On-screen keyboard.** One button shows squeekboard, another click hides it,
 and the button is accented while the keyboard is up. squeekboard runs as a
 systemd user unit (`oskUnit`, `squeekboard.service` by default): showing starts
@@ -196,6 +202,9 @@ running with `qs --path .`).
     small output still gets a usable menu.
   - `terminal` — argv prefix for entries with `Terminal=true`. Honours
     `$TERMINAL`; otherwise change the `["foot"]` fallback to your terminal.
+  - `quickLaunch` — desktop entry ids pinned next to the app menu, in order.
+    Defaults to `["firefox", "org.kde.dolphin"]`; set `[]` for none. The ids are
+    desktop file names without the extension (`ls /usr/share/applications`).
   - `showOsk` — set `false` to drop the on-screen keyboard button entirely.
   - `oskUnit` — the systemd user unit squeekboard runs as.
   - `showWifi` — set `false` to drop the wifi button entirely.
@@ -223,6 +232,7 @@ modules/Bar.qml        The panel window and its three sections
 modules/AppMenu.qml    Left: launcher button
 modules/Launcher.qml   The application menu overlay
 modules/AppEntry.qml   One row in the menu
+modules/QuickLaunch.qml Left: pinned app icons
 modules/WindowList.qml Middle: task list
 modules/WindowButton.qml  One task button
 modules/OskMenu.qml    Right: on-screen keyboard button
@@ -287,6 +297,11 @@ components/ToggleSwitch.qml   On/off switch
   how the panel notices squeekboard going away, since it does not announce that
   itself — would never arrive. Showing retries the call for a few seconds
   because the unit goes active a moment before squeekboard claims its name.
+- The quick-launch icons resolve their ids by scanning `DesktopEntries` rather
+  than calling `byId`. A function call in a binding creates no dependency on the
+  model, so it would be evaluated once against a still-empty entry list and stay
+  empty; scanning `applications.values` makes the binding re-run when the scan
+  finishes, and when an app is installed or removed later.
 - `qs ipc call` cannot reach a handler function named `show`: the name collides
   with the `ipc show` subcommand and the call silently turns into a listing. The
   `osk` target uses `open` and `close` instead, which matches the menu targets