Proxmox VM/LXC templates are intentionally excluded from the monitored
guest list, but their backup files exist on storage. The orphan-detection
logic was firing for every template backup because the VMID was never
in the guest lookup maps.
Fix: track template VMID→node pairs in State.templateVMIDs (unexported,
not serialised to API/frontend) during the resources poll loop, expose
via StateSnapshot.TemplateVMIDs, and use in both buildGuestLookups() and
the storage backup node-resolution map so orphan detection treats template
backups as valid. Also preserves the template map through the cluster
health grace-period path (zero-resource preservation), the partial-node
grace-period path, and clears it on instance removal.
Closes#1352
Pulse was generating tag colours from a hash of the tag name instead
of using the colours configured in Proxmox. Now polls /cluster/options
once per PVE instance and merges the tag-style colour map into state,
which the frontend uses as the first-priority colour source for tag
badges. Falls back to the existing special-tag and hash-based colours
when Proxmox hasn't set a custom colour for a tag.
Show reclaimable buff/cache as a distinct amber segment between used
(green) and free (gray) in the memory bar. This explains why Pulse's
memory percentage differs from Proxmox: Pulse reports cache-aware
usage (MemAvailable) while Proxmox includes cache as used (Total-Free).
Backend: add Cache field to Memory model, derived from MemInfo
(Available - Free). Only uses MemInfo.Free (not FreeMem fallback) to
avoid inflating cache by the balloon gap on ballooned VMs.
Frontend: StackedMemoryBar renders three segments with tooltip
breakdown. Tooltip Free accounts for balloon limit when active.
Percentage label and alerts remain cache-aware (unchanged).
rcourtman