Report actual OCR extraction outcomes instead of existing field values

Co-authored-by: OpenAI Codex <codex@openai.com>

src-ui/src/app/data/ocr-template.ts

@@ -104,7 +104,8 @@ export interface OcrZoneRunResult {
   template: string
   zone: string
   custom_field: string
-  value: string | number | null
+  value: string | number | boolean | null
+  reason?: string | null
 }
 
 export interface OcrZoneRunResponse {