ApiError: defined once in utils/api.ts, replaces 9 ad-hoc anonymous casts
across MazeNET, Inspector, DeckyFleet, SwarmHosts, Webhooks, PersonaGeneration,
ServiceConfigFields, CanaryTokens.
hex4 renamed to tempIdSuffix — the name now matches the comment that already
explained its purpose.
NET_GRID_{W,H,GAP,COLS} extracted from inline magic numbers to module-level
constants in MazeNET.tsx.
onPaletteDrop (130-line useCallback) split into three module-level handlers
(_dropNetwork, _dropArchetype, _dropService); the callback becomes a 10-line
router.
