Record Accepted PCB Placement And Fit

Align component groups, repair affected routing, and add preservation
audits.
Assign the confirmed U2 footprint and update pull-ups to 2 kΩ across
design files.
Document user acceptance, switch to an A3 worksheet, and refresh PCB
exports.

hardware/PCB/validate_schematic.py

@@ -57,7 +57,7 @@ for i, net in enumerate(("BTN_PREVIOUS", "BTN_SELECT", "BTN_NEXT"), 1):
     assert len(nets[net]) == 3
     assert (f"SW{i}", "1") in members[net] and (f"R{i}", "2") in members[net]
     assert components[f"SW{i}"].findtext("value") == "B3F-1000"
-    assert components[f"R{i}"].findtext("value") == "2.2k 1%"
+    assert components[f"R{i}"].findtext("value") == "2k 1%"
 assert members["+3V3"] == sorted([("U1","1"),("U1","2"),("U2","1"),("DS1","2"),("R1","1"),("R2","1"),("R3","1")])
 assert members["GND"] == sorted([("U1","22"),("U1","23"),("U1","43"),("U1","44"),("U2","2"),("DS1","1"),("SW1","2"),("SW2","2"),("SW3","2")])
 active = {name for name in nets if not name.startswith("unconnected-")}
@@ -70,8 +70,8 @@ assert sorted(int(node.get("pin")) for nodes in nets.values() for node in nodes
 # USB/UART0, 5 V and PSRAM-conflicting pins must never be carrier nets.
 for name in active:
     assert not any(node.get("ref") == "U1" and node.get("pin") in ("21","24","25","33","34","35","41","42") for node in nets[name])
-# U2's physical male footprint must stay explicitly unresolved in this draft.
-assert not components["U2"].findtext("footprint")
+# User confirmed the male module shares the reference pinout/header/footprint.
+assert components["U2"].findtext("footprint") == "Carrier:MAX3243_Reference_Provisional"
 expected = json.loads((OUT / "expected-nets.json").read_text())
 assert set(expected) == active
 for net, nodes in expected.items():
@@ -87,8 +87,9 @@ summary = "\n".join([
     "15 firmware GPIO definitions independently checked against exported pin functions.",
     "All 44 MCU header pins accounted for; USB/UART0/5V/PSRAM pins unused on carrier.",
     "PDF and SVG exported successfully.",
-    "Not validated: male-module physical mapping, power budget/path, OLED pull-ups,",
-    "selected connector fit, PCB DRC/layout, procurement, or assembled hardware.",
+    "User accepted module mapping/fit and reports purchased switches/resistors.",
+    "No new hardware tests; regulator margin, USB backfeed safety, RF performance",
+    "and fabrication qualification are not established by this schematic check.",
 ]) + "\n"
 (OUT / "summary.txt").write_text(summary)
 print(summary)