feat(pi-status): integrate desktop status bridge

Expose the persistent Pi session controls through the desktop launcher, Noctalia, and user service.

.config/noctalia/90-machine.toml##class.arch_desktop

@@ -1,10 +1,18 @@
 # Desktop-specific shell layout and hardware telemetry.
+# Pi Status Bridge is installed locally from ~/projects/pi-gui.
+[plugins]
+enabled = ["alex/system-status", "alex/pi-status-bridge"]
+
+[widget.pi-status]
+type = "alex/pi-status-bridge:bridge"
+
 [bar.main]
 position = "bottom"
 layer = "top"
+scale = 0.95
 capsule_radius = 5
 center = ["group:g3", "notifications"]
-end = ["bluetooth", "input_volume", "volume", "control-center", "group:g1", "session"]
+end = ["group:g2", "group:g6", "group:g1", "session"]
 font_weight = 400
 margin_ends = 0
 padding = 0
@@ -15,7 +23,7 @@ shadow = false
 auto_hide = false
 smart_auto_hide = false
 reserve_space = true
-start = ["tray", "group:g4", "group:g2", "privacy"]
+start = ["tray", "group:g4", "privacy"]
 thickness = 39
 widget_spacing = 10
 
@@ -31,7 +39,7 @@ padding = 6.0
 enabled = true
 fill = "surface_variant"
 id = "g2"
-members = ["network_rx", "network_tx", "network"]
+members = ["network", "bluetooth"]
 opacity = 1.0
 padding = 6.0
 
@@ -48,10 +56,19 @@ radius = 5.0
 enabled = true
 fill = "surface_variant"
 id = "g4"
-members = ["cpu", "temp", "ram", "gpu", "gpu_temp", "disk"]
+members = ["pi-status", "cpu", "temp", "ram", "gpu", "gpu_temp", "disk"]
 opacity = 1.0
 padding = 6.0
 
+[[bar.main.capsule_group]]
+enabled = true
+fill = "surface_variant"
+id = "g6"
+members = ["input_volume", "volume"]
+opacity = 1.0
+padding = 6.0
+radius = 5.0
+
 [widget.gpu]
 type = "sysmon"
 stat = "gpu_usage"

.config/noctalia/90-machine.toml##class.arch_laptop

@@ -32,7 +32,7 @@ padding = 6.0
 enabled = true
 fill = "surface_variant"
 id = "g2"
-members = ["network-rate", "network", "bluetooth"]
+members = ["network", "bluetooth"]
 opacity = 1.0
 padding = 6.0