feat: RapidOCR default OCR engine, office-only ocr_engine, drop operator toggle

templates/monitoring.html

@@ -354,9 +354,10 @@
                     <span class="meta-key">OCR Engine</span>
                     <span class="meta-value">
                         <select id="monOcrEngine" style="padding:4px 8px;border-radius:8px;border:1px solid var(--border-color);background:var(--bg-base);color:var(--text-primary);font-size:12px;" onchange="setOcrEngine(this.value)">
-                            <option value="tesseract">tesseract</option>
-                            <option value="paddle">paddle</option>
-                            <option value="none">none</option>
+                            <option value="rapid">RapidOCR (Default, Light &amp; Accurate)</option>
+                            <option value="tesseract">Tesseract (Backup, Light)</option>
+                            <option value="paddle">PaddleOCR (Accuracy, Heavy to run)</option>
+                            <option value="none">None (Manual)</option>
                         </select>
                     </span>
                 </div>