feat: auto interaction detection from real furniture data

Replace classname/name keyword guessing with real data so sit/lay/stand
has zero false positives:
- autoDetectInteraction() now accepts real flags (cansiton/canlayon/
  canstandon), logicType, and animation-state count; real data wins and
  keywords are only a fallback when no real data exists.
- New furni-real-interaction helper reads the local FurnitureData.json
  (highest-revision entries win; a true flag in any duplicate is kept)
  and falls back to the official Habbo furnidata.
- interaction_modes_count now uses emulator conventions: dice=6,
  gate/teleport=2, roller=1, generic multistate = animation-state count,
  chairs/beds=1, plain items=0.
- verifyAndFixInteractionModesCount only touches items with real data
  and skips everything else (no keyword overwrites).
- parseNitroBundle falls back to gunzip for gzip-compressed .nitro files.
- Wired through furni-import, upload-import, clone-import, and the nitro
  editor auto-detect button.

src/app/admin/import/furni/nitro-editor-dialog.tsx

@@ -35,6 +35,7 @@ import { adminFetch } from "@/lib/admin-fetch";
 import {
 	autoDetectInteraction,
 	getInteractionTypeLabel,
+	nitroAnimationStatesCount,
 } from "@/lib/furni/auto-interaction";
 
 interface NitroEditorDialogProps {
@@ -154,7 +155,20 @@ export function NitroEditorDialog({
 	const [jsonError, setJsonError] = useState<string | null>(null);
 
 	const handleAutoDetect = () => {
-		const result = autoDetectInteraction(classname, name);
+		// Use real data when available: the DB flags for this item plus the
+		// .nitro animation states already loaded in the editor. Keyword
+		// detection only kicks in when neither is present — no false positives.
+		const nitroJson =
+			metadata && typeof metadata === "object"
+				? (metadata as Record<string, unknown>)
+				: null;
+		const result = autoDetectInteraction(classname, name, {
+			cansiton: flags.cansiton,
+			canlayon: flags.canlayon,
+			canstandon: flags.canstandon,
+			logicType: nitroJson?.logicType as string | undefined,
+			animationStates: nitroAnimationStatesCount(nitroJson),
+		});
 		setAutoDetectResult(result);
 		setFlags({
 			canstandon: result.canStand,