Workstation optimization: Chrome cleanup, package purge, PCIe audit, service tuning

- Chrome/Chromium cleanup (ADR 0006): removed 10GB chromium profile, broken PWA
  shortcuts, dead BROWSER_CDP_URL from .bashrc, restored Wayland chrome-flags.conf
- Package cleanup (ADR 0007): Tier 1-4 executed, 40 packages removed (KDE Plasma,
  ruby, love, xorg-server, kscreen/kscreenlocker), 45 cascade orphans purged
- Waybar USB module: auto-mount via udisks2, yazi integration, hover details
- Service tuning: disabled bluetooth.service, NetworkManager-wait-online.service
- hypridle fix: upgraded sdbus-cpp 2.3.0->2.3.1-1 (SEGV crash loop resolved)
- PCIe audit: GPU in wrong slot (PCIEX4 vs PCIEX16), 8x bandwidth loss documented
- D-Bus cleanup: removed stale org.kde.kwalletd6.service stub
- Ansible: all changes reflected in vars/main.yml and task files

ansible/roles/hyprland/templates/waybar_config.j2

@@ -4,7 +4,7 @@
     "height": 30,
     "modules-left": ["hyprland/workspaces", "hyprland/mode"],
     "modules-center": ["hyprland/window"],
-    "modules-right": ["network", "cpu", "memory", "custom/gpu", "pulseaudio", "clock", "tray"],
+    "modules-right": ["network", "cpu", "memory", "custom/gpu", "pulseaudio", "custom/usb", "clock", "tray"],
     "hyprland/workspaces": {
         "disable-scroll": true,
         "all-outputs": true,
@@ -41,5 +41,14 @@
         "exec": "~/.config/waybar/scripts/gpu.sh",
         "interval": 5,
         "return-type": "json"
+    },
+    "custom/usb": {
+        "exec": "~/.config/waybar/scripts/usb.sh",
+        "interval": 10,
+        "return-type": "json",
+        "on-click": "~/.config/waybar/scripts/usb.sh open",
+        "on-click-right": "~/.config/waybar/scripts/usb.sh eject",
+        "format": "{}",
+        "tooltip": true
     }
 }