feat: auto-populate book ID, safe title, and OCR page scope from ingest fields

smoke_signal_tab.py

@@ -2753,6 +2753,48 @@ def smoke_signal_tab():
                     inputs=[scope_book_id, scope_include, scope_exclude, scope_title],
                     outputs=[ingest_status, manifest_table, ingest_log],
                 )
+                # Push saved scope values live to OCR page selection fields
+                scope_save_btn.click(
+                    lambda inc, exc: (inc or "", exc or ""),
+                    inputs=[scope_include, scope_exclude],
+                    outputs=[ocr_page_selection, ocr_page_exclusion],
+                )
+
+                # ── Auto-populate: book code + year → both book ID fields ──────
+                def _make_book_id(code, year):
+                    code = (code or "").strip().lower()[:3]
+                    year = (year or "").strip()[:4]
+                    if code and year:
+                        return f"{code}{year}", f"{code}{year}"
+                    return "", ""
+
+                book_code_input.change(
+                    _make_book_id,
+                    inputs=[book_code_input, pub_year_input],
+                    outputs=[update_book_id, scope_book_id],
+                )
+                pub_year_input.change(
+                    _make_book_id,
+                    inputs=[book_code_input, pub_year_input],
+                    outputs=[update_book_id, scope_book_id],
+                )
+
+                # ── Auto-populate: PDF filename → safe book title ─────────────
+                def _safe_title_from_upload(files):
+                    if not files:
+                        return ""
+                    first = files[0] if isinstance(files, list) else files
+                    name = Path(first).stem if isinstance(first, str) else ""
+                    # slugify: lowercase, replace spaces/underscores with hyphens, strip non-alphanum
+                    import re as _re
+                    slug = _re.sub(r"[^a-z0-9]+", "-", name.lower()).strip("-")
+                    return slug
+
+                pdf_upload.change(
+                    _safe_title_from_upload,
+                    inputs=[pdf_upload],
+                    outputs=[scope_title],
+                )
 
                 ingest_btn.click(
                     ingest_pdfs,