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/Clock.tsx

@@ -1,4 +1,5 @@
 import { createPoll } from "ags/time"
+import { exec } from "ags/process"
 
 function formatTime(): string {
   const now = new Date()
@@ -10,6 +11,16 @@ function formatTime(): string {
 }
 
 function formatDate(): string {
+  const now = new Date()
+  return now.toLocaleDateString("fr-FR", {
+    weekday: "long",
+    day: "numeric",
+    month: "long",
+    year: "numeric",
+  })
+}
+
+function formatDateShort(): string {
   const now = new Date()
   return now.toLocaleDateString("fr-FR", {
     weekday: "short",
@@ -18,15 +29,44 @@ function formatDate(): string {
   })
 }
 
+function getCalendar(): string {
+  try {
+    return exec("bash -c \"cal -h\"").trim()
+  } catch {
+    return ""
+  }
+}
+
+function getUptime(): string {
+  try {
+    return exec("bash -c \"uptime -p | sed 's/up //'\"").trim()
+  } catch {
+    return ""
+  }
+}
+
+function buildTooltip(): string {
+  const full = formatDate()
+  const cal = getCalendar()
+  const up = getUptime()
+  return `${full}\n\n${cal}\n\n⏱ uptime: ${up}`
+}
+
 export default function Clock() {
   const time = createPoll("", 1000, () => formatTime())
-  const date = createPoll("", 60000, () => formatDate())
+  const date = createPoll("", 60000, () => formatDateShort())
 
   return (
     <box>
       <label class="clock" label={time} />
       <label class="separator" label="│" />
-      <label class="date" label={date} />
+      <eventbox
+        onHover={(self) => {
+          self.tooltipText = buildTooltip()
+        }}
+      >
+        <label class="date" label={date} hasTooltip />
+      </eventbox>
     </box>
   )
 }