feat: add home-assistant-dashboard-conventions skill + update multiple skills

- New: smart-home/home-assistant-dashboard-conventions (Mushroom cards, view tabs, no Bubble Cards)
- Updated: rke2, ceph, galera, proxmox, brainstorming, compound-learning, 1password-cli, smart-home-automation skills
- New references: ceph-cluster-administration, docker-volume-forensics, ceph-crush-weight, ceph-ec-mixed-size

smart-home/home-assistant-dashboard-conventions/SKILL.md

@@ -0,0 +1,41 @@
+---
+name: home-assistant-dashboard-conventions
+description: "Home Assistant dashboard styling rules: card types, navigation, and layout conventions for the familie-schoen.com homelab."
+version: 1.0.0
+tags: [home-assistant, dashboard, ui, mushroom, smart-home]
+---
+
+# Home Assistant Dashboard Conventions
+
+## Card Types
+
+| Allowed ✅ | Forbidden 🚫 |
+|------------|--------------|
+| Mushroom cards | Bubble Cards (revoked/abandoned) |
+| Native HA cards | Custom cards that require unsupported HACS integrations |
+
+**Rationale:** Bubble Cards were revoked by the developer. Mushroom cards are actively maintained and cover all use cases (sensor, light, climate, media, chip).
+
+## Navigation
+
+- Use **view tabs** for navigation (native HA feature)
+- Do NOT use custom navigation overlays or popup cards
+- One dashboard per area/floor, linked via view tabs
+
+## Layout
+
+- Grid layout with responsive breakpoints
+- Maximum 4 columns on desktop, 1 on mobile
+- Group sensors by room/area, not by type
+- Use Mushroom chips for quick-status badges at the top of each view
+
+## Color Scheme
+
+- Follow Mushroom default color scheme (adaptive)
+- Do NOT override entity icon colors manually unless semantically necessary (e.g. red for alert states)
+
+## Pitfalls
+
+- **Bubble Cards break on HA updates.** They were deprecated and removed — do not re-add them even if old configs reference them.
+- **Mushroom requires HACS.** Ensure HACS is installed before using Mushroom cards. If HACS breaks, dashboards degrade to native cards gracefully.
+- **View tab YAML vs UI.** Prefer UI-configured views over YAML dashboards for maintainability. Use YAML only for complex templated views.