controller v0.45.0: storage UX polish — deterministic order, init filter, register shortcut, system-storage clarity

B1 sort /api/disks (user-data→system→backup, alpha within); B2 init wizard
excludes mounted drives; B3 Regisztrálás primary action for mounted-unregistered
user-data drives (POST /api/storage/register); B4 per-card purpose descriptions +
app-backing tags + tiering note (local & local-lvm both kept); B5 eject already
names affected apps. Pairs with felhom-agent v0.24.0 eject role-gate.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

controller/internal/web/agent_disk_handlers.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"net/http"
+	"sort"
 
 	"gitea.dooplex.hu/admin/felhom-controller/internal/agentapi"
 )
@@ -73,9 +74,39 @@ func (s *Server) agentDisksListHandler(w http.ResponseWriter, r *http.Request) {
 		writeDiskJSON(w, http.StatusBadGateway, false, err.Error(), nil)
 		return
 	}
+	// Deterministic order: the agent's storage view iterates a Go map (unordered), so the list would
+	// otherwise reorder on every reload (CLAUDE.md lesson #3). The customer's manageable drives go on
+	// top, in a stable order: user-data first, then system, then backup, alpha by name within a tier.
+	sortDisksForView(resp.Disks)
 	writeDiskJSON(w, http.StatusOK, true, "", resp)
 }
 
+// sortDisksForView orders the agent's disk list deterministically (user-data → system → backup →
+// unrecognized; alphabetical by storage name within each tier). A stable Go-side contract beats
+// relying on map iteration order or template JS alone.
+func sortDisksForView(disks []agentapi.DiskInfo) {
+	sort.SliceStable(disks, func(i, j int) bool {
+		if ri, rj := diskRoleRank(disks[i].Role), diskRoleRank(disks[j].Role); ri != rj {
+			return ri < rj
+		}
+		return disks[i].Name < disks[j].Name
+	})
+}
+
+// diskRoleRank ranks a role for the overview ordering (lower sorts first).
+func diskRoleRank(role string) int {
+	switch role {
+	case "user-data":
+		return 0
+	case "system":
+		return 1
+	case "backup":
+		return 2
+	default:
+		return 3
+	}
+}
+
 // agentDiskAssignHandler proxies POST /api/disks/assign → agent POST /disks/assign.
 func (s *Server) agentDiskAssignHandler(w http.ResponseWriter, r *http.Request) {
 	var req struct {