style: gofmt normalization — no logic changes

gofmt -w across the controller tree (46 files) so gofmt -l is empty — disarms the
formatting landmine where a targeted edit + accidental gofmt -w swept ~46 unrelated
files. Pure formatting: whitespace + gofmt's optional-semicolon removal in reflowed
inline closures. One doc comment reworded ('' -> 'the empty string') to avoid gofmt's
Go-1.19 doc-comment typographic substitition ('' -> curly quote) muddying its meaning.
No build/vet/test behavior change.

controller/internal/web/funcmap.go

@@ -174,7 +174,7 @@ func (s *Server) templateFuncMap() template.FuncMap {
 		},
 		// isOperational returns true for any state where the stack has containers
 		// and is not stopped/exited — used by templates for showing action buttons
-		"isOperational": isOperationalState,
+		"isOperational":    isOperationalState,
 		"routeUnpublished": routeUnpublished,
 		"logoURL": func(slug string) string {
 			return s.cfg.AppLogoURL(slug)