finished up grid detection.

src/game/OcrDaemon.ts

@@ -24,10 +24,24 @@ export interface OcrResponse {
   lines: OcrLine[];
 }
 
+export interface DetectGridResult {
+  detected: boolean;
+  region?: Region;
+  cols?: number;
+  rows?: number;
+  cellWidth?: number;
+  cellHeight?: number;
+}
+
 interface DaemonRequest {
   cmd: string;
   region?: Region;
   path?: string;
+  cols?: number;
+  rows?: number;
+  threshold?: number;
+  minCellSize?: number;
+  maxCellSize?: number;
 }
 
 interface DaemonResponse {
@@ -36,6 +50,13 @@ interface DaemonResponse {
   text?: string;
   lines?: OcrLine[];
   image?: string;
+  cells?: boolean[][];
+  detected?: boolean;
+  region?: Region;
+  cols?: number;
+  rows?: number;
+  cellWidth?: number;
+  cellHeight?: number;
   error?: string;
 }
 
@@ -85,6 +106,28 @@ export class OcrDaemon {
     return Buffer.from(resp.image!, 'base64');
   }
 
+  async gridScan(region: Region, cols: number, rows: number, threshold?: number): Promise<boolean[][]> {
+    const req: DaemonRequest = { cmd: 'grid', region, cols, rows };
+    if (threshold) req.threshold = threshold;
+    const resp = await this.sendWithRetry(req, REQUEST_TIMEOUT);
+    return resp.cells ?? [];
+  }
+
+  async detectGrid(region: Region, minCellSize?: number, maxCellSize?: number): Promise<DetectGridResult> {
+    const req: DaemonRequest = { cmd: 'detect-grid', region };
+    if (minCellSize) req.minCellSize = minCellSize;
+    if (maxCellSize) req.maxCellSize = maxCellSize;
+    const resp = await this.sendWithRetry(req, REQUEST_TIMEOUT);
+    return {
+      detected: resp.detected ?? false,
+      region: resp.region,
+      cols: resp.cols,
+      rows: resp.rows,
+      cellWidth: resp.cellWidth,
+      cellHeight: resp.cellHeight,
+    };
+  }
+
   async saveScreenshot(path: string, region?: Region): Promise<void> {
     const req: DaemonRequest = { cmd: 'screenshot', path };
     if (region) req.region = region;