ocr 및 스캐너 기능 구현

packages/frontend/src/config/app.ts

@@ -7,6 +7,7 @@ export const APP_DISPLAY_NAME = "Sejong Office";
 
 export type DiagramKind = "excalidraw" | "mermaid" | "drawio";
 export type ViewerKind = "cad" | "model3d";
+export type ToolKind = "scanner";
 
 const DIAGRAM_EXTENSION_KIND: Record<string, DiagramKind> = {
   excalidraw: "excalidraw",
@@ -16,6 +17,25 @@ const DIAGRAM_EXTENSION_KIND: Record<string, DiagramKind> = {
   xml: "drawio",
 };
 
+/** Image files opened in the document scanner tool. */
+export const SCANNER_EXTENSIONS = new Set([
+  "png",
+  "jpg",
+  "jpeg",
+  "webp",
+  "gif",
+  "bmp",
+]);
+
+const TOOL_EXTENSION_KIND: Record<string, ToolKind> = {
+  png: "scanner",
+  jpg: "scanner",
+  jpeg: "scanner",
+  webp: "scanner",
+  gif: "scanner",
+  bmp: "scanner",
+};
+
 /** Online3DViewer import formats (+ zip container). */
 export const MODEL3D_EXTENSIONS = [
   "3dm",
@@ -95,3 +115,11 @@ export function diagramKindFor(filename: string): DiagramKind | null {
 export function viewerKindFor(filename: string): ViewerKind | null {
   return VIEWER_EXTENSION_KIND[extensionOf(filename)] ?? null;
 }
+
+export function toolKindFor(filename: string): ToolKind | null {
+  return TOOL_EXTENSION_KIND[extensionOf(filename)] ?? null;
+}
+
+export function isScannerImage(filename: string): boolean {
+  return SCANNER_EXTENSIONS.has(extensionOf(filename));
+}