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

docs/tech/stack.md

@@ -6,7 +6,7 @@ tags:
   - software-stack
   - inventory
   - tech-stack
-last_updated: '2026-03-13'
+last_updated: '2026-05-22'
 ---
 
 # Software Stack - mw-pfeddersheim-workstation
@@ -25,10 +25,63 @@ last_updated: '2026-03-13'
 | **bat** | latest | A `cat` clone with syntax highlighting |
 | **rustdesk** | latest | Remote management via Tailscale |
 
+## Desktop Environment
+
+|| Technology | Version | Description |
+||------------|---------|-------------|
+|| **Hyprland** | 0.55.2 | Wayland compositor (uwsm-managed) |
+|| **Waybar** | latest | Status bar (with USB auto-mount module) |
+|| **Kitty** | latest | GPU-accelerated terminal emulator |
+|| **Fuzzel** | latest | Application launcher (preferred over Wofi) |
+|| **Dunst** | latest | Notification daemon |
+|| **yazi** | latest | Terminal file manager (full deps: chafa, 7zip, resvg, etc.) |
+
+## Known Issues (2026-05-22 Boot Audit)
+
+| Domain | Issue | Status |
+|--------|-------|--------|
+| **PCIe slot** | GPU in bottom PCIEX4 slot (PCIe 2.0 x4, ~2 GB/s) instead of top PCIEX16 (PCIe 3.0 x16, ~16 GB/s). **8x bandwidth loss** | **Pending**: physical move required |
+| **PCIe slot** | NVMe Samsung PM9A1 running Gen2 x4 (8 GT/s) instead of Gen3 x4 (16 GT/s). May resolve after GPU slot fix + BIOS Gen3 setting | **Pending**: BIOS tuning |
+| **Idle daemon** | hypridle SEGV crash loop — sdbus-cpp 2.3.0 ABI break | **Fixed**: sdbus-cpp upgraded to 2.3.1-1 |
+| **Webcam (UVC)** | Device 1-10 has multiple UVC control failures (zoom/pan/tilt/iris non-functional due to firmware non-compliance) | Known hardware limitation, core capture works |
+| **KVM** | `/dev/kvm` unavailable — libvirtd cannot use hardware acceleration | Open — check BIOS VT-x/AMD-V |
+| **Wi-Fi regulatory** | `regulatory.db` firmware missing — channels restricted | Open — install `wireless-regdb` |
+| **D-Bus** | Stale `org.kde.kwalletd6.service` file; dunst/kscreen naming mismatches | **Fixed**: kwalletd6 stub removed; kscreen/kscreenlocker/libkscreen uninstalled (35 MiB) |
+| **XDG portals** | Deprecated `UseIn` key usage (portals.conf preferred) | Low priority, functional |
+
+**Removed (2026-05-22, ADR 0007)**: All X11 display managers (lightdm, sddm), X11 video/input drivers (xf86-*), X11 tools (xterm, xorg-xinit, x11vnc, etc.), entire KDE Plasma stack (kwin, plasma-desktop, plasma-workspace, plasma-nm, plasma-pa, powerdevil, etc.), and Dolphin (replaced by yazi). `greetd`+`tuigreet` is the active DM. Screenshots use `grim`+`slurp`+`grimblast`.
+
+## Browsers
+
+| Technology | Version | Notes |
+|------------|---------|-------|
+| **Google Chrome** | 148.0.7778.178 (AUR) | Sole browser — Wayland-native, VA-API on NVIDIA |
+| ~~Chromium~~ | ~~removed~~ | All artifacts cleaned 2026-05-22 (see ADR 0006) |
+
 ## OS Context
 - **OS**: Linux (Manjaro/Arch Linux based)
 - **Architecture**: x86_64
 
+## Package Domain Classification (ADR 0007 Tier 4)
+
+Packages previously listed as "Misc" reclassified to functional domains:
+
+| Package | New Domain | Role |
+|---------|-----------|------|
+| uv | Python Toolchain | Fast Python package/env manager |
+| jq | Shell/Terminal | JSON processor |
+| inxi | Hardware | System hardware info |
+| lsof | Core OS | List open files |
+| iproute2 | Network | Advanced routing/networking |
+| openresolv | Network | DNS resolver management |
+| perl-image-exiftool | Dev Tools | Metadata read/write |
+| icoutils | Dev Tools | ICO/ANE cursor extraction |
+| innoextract-git | Dev Tools | Inno Setup installer extraction |
+| opencl-headers | GPU Compute | OpenCL C headers |
+| libxnvctrl-580xx | NVIDIA | NVML/XNVCTRL for 580xx |
+| zram-generator | Core OS | Systemd zram swap generator |
+| mkinitcpio-openswap | Core OS | Swap resume hook for mkinitcpio |
+
 ## Maintenance Policies
 - **Updates**: System-wide updates via `pacman` managed through maintenance scripts.
 - **Node.js**: Global packages managed via `pnpm`.