feat: update algorithm integrations and point cloud overlays

server/routers.ts

@@ -162,6 +162,25 @@ export const appRouter = router({
         await db.deleteTaskCadFile(input.id);
         return { success: true };
       }),
+
+    // 检查 CAD 文件是否已有三角化采样缓存（.cad_sample_cache/ 目录下存在对应 PLY）
+    hasSampleCache: protectedProcedure
+      .input(z.object({ cadFileIds: z.array(z.number()) }))
+      .query(async ({ input }) => {
+        const result: Record<number, boolean> = {};
+        for (const id of input.cadFileIds) {
+          const row = await db.getTaskCadFileById(id);
+          if (!row?.filePath) { result[id] = false; continue; }
+          const cacheDir = path.join(path.dirname(row.filePath), '.cad_sample_cache');
+          try {
+            const files = fs.readdirSync(cacheDir);
+            result[id] = files.some(f => f.endsWith('.ply'));
+          } catch {
+            result[id] = false;
+          }
+        }
+        return result;
+      }),
   }),
 
   // ─── 检测任务 ──────────────────────────────────────────────────────────────