controller v0.92.0: NAS network storage Part A2 (registry + UI + per-share health)

Controller-side of NAS network storage, proxying to agent A1 /netstorage/*. Distinct
'network' storage kind (no drive lifecycle); add/list/remove + per-share health UI;
unreachable NAS is a recoverable warning, never the drive missing/stop cascade; SMB
creds pass through to the agent, never persisted.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HxLA1mZurFq9kt8hneFeCs

controller/internal/web/templates/style.css

@@ -3146,6 +3146,7 @@ a.stat-card:hover {
 
 /* badges missing from the global sheet */
 .badge-ok { background: rgba(35, 134, 54, 0.18); color: #3fb950; }
+.badge-neutral { background: rgba(139, 148, 158, 0.18); color: #8b949e; }
 .badge-lock { background: rgba(210, 153, 34, 0.18); color: var(--yellow); }
 .badge-muted { background: rgba(110, 118, 129, 0.18); color: var(--text-muted); }
 .badge-info { background: rgba(0, 136, 204, 0.18); color: var(--accent-light); }