Treat KiCad Value/PNM as the IC MPN when the MPN column is empty.

Those 13 U* were in the BOM (TPS22965, TPD2E007, TMP117, …) but never entered ic_mpns, so review skipped them as missing PDFs. Also try the BOM Datasheet URL first.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_bom_parser.py

@@ -0,0 +1,31 @@
+"""KiCad BOM: Value/PNM as MPN when Manufacturer Part Number is empty."""
+
+from pathlib import Path
+
+from backend.pinscopex.parsers import parse_bom
+
+
+def test_parse_bom_uses_value_for_ic_when_mpn_column_empty(tmp_path: Path):
+    csv = tmp_path / "bom.csv"
+    csv.write_text(
+        "Reference,Qty,Value,DNP,Footprint,Datasheet,PNM\n"
+        "U1,1,TPS22965DSGR,,SON-8,,\n"
+        '"U9,U13",5,TPD2E007DCKR,,SOT-23,,\n'
+        "C1,1,100nF,,0805,,\n"
+    )
+    bom = parse_bom(csv, mpn_col="Manufacturer Part Number")
+    assert bom["U1"]["mpn"] == "TPS22965DSGR"
+    assert bom["U9"]["mpn"] == "TPD2E007DCKR"
+    assert bom["U13"]["mpn"] == "TPD2E007DCKR"
+    assert bom["C1"]["mpn"] is None
+
+
+def test_parse_bom_keeps_pnm_and_datasheet_url(tmp_path: Path):
+    csv = tmp_path / "bom.csv"
+    csv.write_text(
+        "Reference,Value,PNM,Datasheet\n"
+        "U31,TMP117,TMP117NAIDRVR,https://www.ti.com/lit/ds/symlink/tmp117.pdf\n"
+    )
+    bom = parse_bom(csv, mpn_col="Manufacturer Part Number")
+    assert bom["U31"]["mpn"] == "TMP117NAIDRVR"
+    assert bom["U31"]["datasheet_url"].endswith("tmp117.pdf")