feat(presence-detect): tint caffeine eww widget hot pink while presence holds the lock

Add presence-status.sh reporting true only when the daemon (not a manual
caffeine toggle) owns the shared idle lock, via the existing OWNED_FLAG.
Wire it into all three eww bars: the caffeine button gains a
.caffeine-presence class → the #E40046 Active accent used elsewhere, so
camera-driven auto-awake is visually distinct from a manual session.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

desktopenvs/hyprlua/eww-nobattery/eww.scss

@@ -75,7 +75,13 @@ tooltip {
 
 .workspace-active {
     color: #E40046;
-  
+
+}
+
+// caffeine widget while the presence-detect daemon holds the idle lock:
+// tint it the Active Hot Pink accent used for highlights everywhere else.
+.caffeine-presence {
+    color: #E40046;
 }
 
 menuitem {

desktopenvs/hyprlua/eww-nobattery/eww.yuck

@@ -118,9 +118,15 @@
 (defpoll caffeine-active :interval "2s"
   "~/Dotfiles/desktopenvs/hyprlua/scripts/caffeine-status.sh")
 
+; presence-active poll — true only when the presence-detect daemon (not a manual
+; caffeine toggle) is holding the idle lock, i.e. the camera currently sees you.
+(defpoll presence-active :interval "2s"
+  "~/Dotfiles/desktopenvs/hyprlua/scripts/presence-status.sh")
+
 (defwidget caffeine []
-  (button :class "music"
+  (button :class {presence-active == "true" ? "music caffeine-presence" : "music"}
           :onclick "~/Dotfiles/desktopenvs/hyprlua/scripts/caffeine.sh"
-          :tooltip {caffeine-active == "true" ? "Caffeine: ON" : "Caffeine: OFF"}
+          :tooltip {presence-active == "true" ? "Caffeine: ON (presence)"
+                    : caffeine-active == "true" ? "Caffeine: ON" : "Caffeine: OFF"}
     {caffeine-active == "true" ? "☕" : "󰅺"}))
 

desktopenvs/hyprlua/eww-touch/eww.scss

@@ -83,6 +83,12 @@ tooltip {
 
 }
 
+// caffeine widget while the presence-detect daemon holds the idle lock:
+// tint it the Active Hot Pink accent used for highlights everywhere else.
+.caffeine-presence {
+    color: #E40046;
+}
+
 // astal-menu launcher button — accent-coloured icon, highlight on hover
 .menu-launcher {
   color: #E40046;

desktopenvs/hyprlua/eww-touch/eww.yuck

@@ -164,9 +164,15 @@
 (defpoll caffeine-active :interval "2s"
   "~/Dotfiles/desktopenvs/hyprlua/scripts/caffeine-status.sh")
 
+; presence-active poll — true only when the presence-detect daemon (not a manual
+; caffeine toggle) is holding the idle lock, i.e. the camera currently sees you.
+(defpoll presence-active :interval "2s"
+  "~/Dotfiles/desktopenvs/hyprlua/scripts/presence-status.sh")
+
 (defwidget caffeine []
-  (button :class "music"
+  (button :class {presence-active == "true" ? "music caffeine-presence" : "music"}
           :onclick "~/Dotfiles/desktopenvs/hyprlua/scripts/caffeine.sh"
-          :tooltip {caffeine-active == "true" ? "Caffeine: ON" : "Caffeine: OFF"}
+          :tooltip {presence-active == "true" ? "Caffeine: ON (presence)"
+                    : caffeine-active == "true" ? "Caffeine: ON" : "Caffeine: OFF"}
     {caffeine-active == "true" ? "☕" : "󰅺"}))
 

desktopenvs/hyprlua/eww/eww.scss

@@ -75,7 +75,13 @@ tooltip {
 
 .workspace-active {
     color: #E40046;
-  
+
+}
+
+// caffeine widget while the presence-detect daemon holds the idle lock:
+// tint it the Active Hot Pink accent used for highlights everywhere else.
+.caffeine-presence {
+    color: #E40046;
 }
 
 menuitem {

desktopenvs/hyprlua/eww/eww.yuck

@@ -206,11 +206,20 @@
 (defpoll caffeine-active :interval "2s"
   "~/Dotfiles/desktopenvs/hyprlua/scripts/caffeine-status.sh")
 
+; presence-active poll — true only when the presence-detect daemon (not a manual
+; caffeine toggle) is holding the idle lock, i.e. the camera currently sees you.
+; Used to tint the caffeine widget in the Active Hot Pink accent.
+(defpoll presence-active :interval "2s"
+  "~/Dotfiles/desktopenvs/hyprlua/scripts/presence-status.sh")
+
 ; caffeine widget — a button that toggles the caffeine idle-inhibit lock.
 ; ☕ = caffeine is ON (screen won't sleep), 󰅺 = caffeine is OFF (normal idle).
-; Tooltip shows the current state for clarity.
+; When presence detection is the reason the lock is held, the widget also turns
+; the Active Hot Pink accent (.caffeine-presence) so auto-awake is distinct from
+; a manual caffeine session. Tooltip shows the current state for clarity.
 (defwidget caffeine []
-  (button :class "music"
+  (button :class {presence-active == "true" ? "music caffeine-presence" : "music"}
           :onclick "~/Dotfiles/desktopenvs/hyprlua/scripts/caffeine.sh"
-          :tooltip {caffeine-active == "true" ? "Caffeine: ON" : "Caffeine: OFF"}
+          :tooltip {presence-active == "true" ? "Caffeine: ON (presence)"
+                    : caffeine-active == "true" ? "Caffeine: ON" : "Caffeine: OFF"}
     {caffeine-active == "true" ? "☕" : "󰅺"}))

desktopenvs/hyprlua/scripts/presence-status.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+# Reports whether the *presence-detect daemon* is currently holding the idle
+# inhibitor (i.e. the camera saw motion and is auto-keeping the screen awake),
+# as opposed to a manual caffeine toggle.
+#
+# The lock is shared with caffeine.sh, so PID_FILE alone can't tell the two
+# sources apart. OWNED_FLAG is touched only by presence-detect.sh when it starts
+# the inhibitor and cleared by both a manual caffeine toggle and the daemon's
+# own release — so "PID alive AND OWNED_FLAG present" uniquely means the daemon
+# owns the lock right now.
+#
+# Prints "true" when presence-detect owns the lock, else "false". Used by the
+# Eww caffeine widget to highlight itself in the Active Hot Pink accent.
+PID_FILE="/tmp/caffeine-inhibit.pid"
+OWNED_FLAG="/tmp/presence-inhibit-owned"
+
+if [[ -f "$PID_FILE" ]] && kill -0 "$(cat "$PID_FILE")" 2>/dev/null && [[ -f "$OWNED_FLAG" ]]; then
+    echo "true"
+else
+    echo "false"
+fi