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/modules/Battery.tsx

@@ -1,38 +1,30 @@
 import AstalBattery from "gi://AstalBattery"
-import { createBinding, createDerivedBinding } from "ags"
+import { createBinding } from "ags"
 
 export default function Battery() {
   const bat = AstalBattery.get_default()
 
-  const percentage = createBinding(bat, "percentage")
-  const charging = createBinding(bat, "charging")
+  const text = createBinding(bat, "percentage")((p: number) => {
+    const pct = Math.round(p * 100)
+    const isCharging = bat.charging
+    let icon = ""
+    if (isCharging) icon = "󰂄"
+    else if (pct > 90) icon = "󰁹"
+    else if (pct > 70) icon = "󰂁"
+    else if (pct > 50) icon = "󰁿"
+    else if (pct > 30) icon = "󰁽"
+    else if (pct > 10) icon = "󰁻"
+    else icon = "󰂃"
+    return `${icon} ${pct}%`
+  })
 
-  const text = createDerivedBinding(
-    [percentage, charging],
-    (p: number, isCharging: boolean) => {
-      const pct = Math.round(p * 100)
-      let icon = ""
-      if (isCharging) icon = "󰂄"
-      else if (pct > 90) icon = "󰁹"
-      else if (pct > 70) icon = "󰂁"
-      else if (pct > 50) icon = "󰁿"
-      else if (pct > 30) icon = "󰁽"
-      else if (pct > 10) icon = "󰁻"
-      else icon = "󰂃"
-      return `${icon} ${pct}%`
-    },
-  )
-
-  const cls = createDerivedBinding(
-    [percentage, charging],
-    (p: number, isCharging: boolean) => {
-      const pct = Math.round(p * 100)
-      if (isCharging) return "battery charging"
-      if (pct <= 10) return "battery low"
-      if (pct <= 20) return "battery warning"
-      return "battery"
-    },
-  )
+  const cls = createBinding(bat, "percentage")((p: number) => {
+    const pct = Math.round(p * 100)
+    if (bat.charging) return "battery charging"
+    if (pct <= 10) return "battery low"
+    if (pct <= 20) return "battery warning"
+    return "battery"
+  })
 
   return <label class={cls} label={text} />
 }