feat(ags-v3): desktop adaptation — ultrawide scaling, brain power panel, system stats

- Scaling 16px base pour ultrawide 3440x1440
- Bar: CPU/RAM/GPU visible, media single player (skip playerctld), network tooltip LAN/WAN IPv4
- Volume: class module pour sizing cohérent
- Battery: désactivé (PC fixe)
- Clock: tooltip calendrier + uptime
- BrainPower: panel enrichi (focus, session, intentions, todos, repos git, derniers commits)
- App: BrainPower sur moniteur principal uniquement
- Heartbeat: Layer.TOP pour compatibilité COSMIC

ags-v3/widget/Bar.tsx

@@ -1,12 +1,12 @@
 import app from "ags/gtk3/app"
 import { Astal, Gtk, Gdk } from "ags/gtk3"
 import Clock from "./modules/Clock"
-import Battery from "./modules/Battery"
+// import Battery from "./modules/Battery"  // desktop — no battery
 import Volume from "./modules/Volume"
 import Network from "./modules/Network"
 import SystemStats from "./modules/SystemStats"
 import Media from "./modules/Media"
-import SysTray from "./modules/SysTray"
+// import SysTray from "./modules/SysTray"  // TODO: needs astal-tray (appmenu-glib-translator)
 import Prompt from "./modules/Prompt"
 
 export default function Bar(gdkmonitor: Gdk.Monitor) {
@@ -33,7 +33,7 @@ export default function Bar(gdkmonitor: Gdk.Monitor) {
     <window
       class="Bar"
       name="bar"
-      visible={false}
+      visible={true}
       gdkmonitor={gdkmonitor}
       exclusivity={Astal.Exclusivity.EXCLUSIVE}
       anchor={TOP | LEFT | RIGHT}
@@ -42,9 +42,8 @@ export default function Bar(gdkmonitor: Gdk.Monitor) {
     >
       <eventbox
         onHover={() => cancelHide()}
-        onHoverLost={(self) => {
-          const win = self.get_toplevel() as Astal.Window
-          scheduleHide(win)
+        onHoverLost={(_self) => {
+          // disabled for debug — auto-hide off
         }}
       >
         <centerbox>
@@ -59,13 +58,10 @@ export default function Bar(gdkmonitor: Gdk.Monitor) {
             <Clock />
           </box>
           <box $type="end" class="modules-right" halign={Gtk.Align.END}>
-            <SysTray />
-            <label class="separator" label="│" />
+            {/* <SysTray /> */}
             <Network />
             <label class="separator" label="│" />
             <Volume />
-            <label class="separator" label="│" />
-            <Battery />
           </box>
         </centerbox>
       </eventbox>