v0.13.0: UI polish fixes (8 improvements)

- Fix 1: Dashboard backup card border (verified already correct)
- Fix 2: Show auto-generated env values on deploy page with copy/reveal
- Fix 3: Temperature value pill for better visibility on dashboard
- Fix 4: Rework dashboard backup section (remove manual trigger, add Tier 2 summary)
- Fix 5: Scope HDD warning banner to dashboard and monitoring pages only
- Fix 6: Move Tárhely section up in monitoring page
- Fix 7: Snapshot table clarity (HOZZÁADOTT header, n/a instead of -)
- Fix 8: Restructure Tároló section into tiered storage view

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

controller/internal/web/funcmap.go

@@ -305,5 +305,15 @@ func (s *Server) templateFuncMap() template.FuncMap {
 			}
 			return id
 		},
+		// pageMatch returns true if currentPage is in the pages slice.
+		// Used to filter page-specific alerts in layout.html.
+		"pageMatch": func(pages []string, currentPage string) bool {
+			for _, p := range pages {
+				if p == currentPage {
+					return true
+				}
+			}
+			return false
+		},
 	}
 }