feat: add laptop/display brightness modulation

programs/src/capabilities/main.cpp

@@ -20,7 +20,7 @@ extern "C" {
 using namespace gui;
 
 static constexpr int WIN_W = 760;
-static constexpr int WIN_H = 560;
+static constexpr int WIN_H = 582;   // one grid row per capability
 static constexpr int TAB_H = 36;
 static constexpr int FOOTER_H = 44;
 static constexpr int PAD = 18;
@@ -60,11 +60,12 @@ static const char* const kCapDescriptions[CAP_COUNT] = {
     "Configure network interfaces, DHCP and Wi-Fi",
     "Set the system clock",
     "Manage user accounts and session identities",
-    "Change display modes and panel brightness",
+    "Change display modes",
     "Manage hardware devices (Bluetooth, radio)",
     "Read the kernel log",
     "Write to 0:/os and 0:/apps (never part of \"all\")",
     "Read and send input to other windows (never part of \"all\")",
+    "Set the display backlight",
 };
 
 // ==== Grant table model ====