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/dev-tools/tasks/main.yml

@@ -109,6 +109,7 @@
       - oha
       - unetbootin
       - ventoy
+      - chromium-widevine
     state: absent
 
 - name: Ensure legacy editor packages are removed
@@ -134,6 +135,15 @@
     mode: '0644'
   tags: [chrome, nvidia, wayland]
 
+- name: Remove dead BROWSER_CDP_URL from .bashrc
+  ansible.builtin.lineinfile:
+    path: "/home/{{ system_user }}/.bashrc"
+    regexp: '.*BROWSER_CDP_URL.*'
+    state: absent
+  become: yes
+  become_user: "{{ system_user }}"
+  tags: [chrome, shell, cleanup]
+
 - name: Fix kitty cursor keys by removing TERM override in .bashrc
   ansible.builtin.lineinfile:
     path: "/home/{{ system_user }}/.bashrc"