Render vendor-model photos on asset detail heroes

Computer and Printer payloads now surface the linked model imageurl the
way machines already did, and the machine/PC/printer detail heroes
render the photo when present (network devices and measuring tools
have no model link, so nothing to surface). Absent images render
nothing rather than a broken icon.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/test_plugins/test_model_image_in_detail.py

@@ -0,0 +1,100 @@
+"""Vendor-model photo surfaces in asset-extension detail payloads.
+
+Machines, computers, and printers link a vendor Model via modelnumberid; when
+that Model carries an imageurl, the extension dict in the GET detail payload
+must expose it as 'imageurl' (the field name machines established, consumed by
+the detail-page heroes and the machine badge). When no model is linked, the
+field must be absent so the frontend v-if renders nothing.
+
+Network devices and measuring tools have no model link, so they are out of
+scope here by design.
+"""
+
+from shopdb.extensions import db as _db
+from shopdb.core.models import Asset, AssetType, Model
+
+from plugins.machines.models import Machine
+from plugins.computers.models import Computer
+from plugins.printers.models import Printer
+
+IMAGE_URL = '/api/models/images/model-1.png'
+
+
+def _seed_asset(assetnumber, assettype):
+    atype = AssetType.query.filter_by(assettype=assettype).first()
+    if not atype:
+        atype = AssetType(assettype=assettype)
+        _db.session.add(atype)
+        _db.session.flush()
+    asset = Asset(assetnumber=assetnumber, assettypeid=atype.assettypeid)
+    _db.session.add(asset)
+    _db.session.flush()
+    return asset
+
+
+def _seed_model(imageurl=IMAGE_URL):
+    model = Model(modelnumber='IMG-MODEL-1', imageurl=imageurl)
+    _db.session.add(model)
+    _db.session.flush()
+    return model
+
+
+def test_machine_detail_carries_model_imageurl(client, db):
+    asset = _seed_asset('2001', 'machine')
+    model = _seed_model()
+    machine = Machine(assetid=asset.assetid, modelnumberid=model.modelnumberid)
+    _db.session.add(machine)
+    _db.session.commit()
+
+    resp = client.get(f'/api/machines/{machine.machineid}')
+    assert resp.status_code == 200, resp.get_json()
+    assert resp.get_json()['data']['machine']['imageurl'] == IMAGE_URL
+
+
+def test_computer_detail_carries_model_imageurl(client, db):
+    asset = _seed_asset('PC-2001', 'computer')
+    model = _seed_model()
+    computer = Computer(assetid=asset.assetid, modelnumberid=model.modelnumberid)
+    _db.session.add(computer)
+    _db.session.commit()
+
+    resp = client.get(f'/api/computers/{computer.computerid}')
+    assert resp.status_code == 200, resp.get_json()
+    assert resp.get_json()['data']['computer']['imageurl'] == IMAGE_URL
+
+
+def test_printer_detail_carries_model_imageurl(client, db):
+    asset = _seed_asset('PR-2001', 'printer')
+    model = _seed_model()
+    printer = Printer(assetid=asset.assetid, modelnumberid=model.modelnumberid)
+    _db.session.add(printer)
+    _db.session.commit()
+
+    resp = client.get(f'/api/printers/{printer.printerid}')
+    assert resp.status_code == 200, resp.get_json()
+    assert resp.get_json()['data']['printer']['imageurl'] == IMAGE_URL
+
+
+def test_detail_omits_imageurl_without_model(client, db):
+    """No model linked -> no imageurl key (frontend v-if shows nothing)."""
+    asset = _seed_asset('PR-2002', 'printer')
+    printer = Printer(assetid=asset.assetid)
+    _db.session.add(printer)
+    _db.session.commit()
+
+    resp = client.get(f'/api/printers/{printer.printerid}')
+    assert resp.status_code == 200, resp.get_json()
+    assert 'imageurl' not in resp.get_json()['data']['printer']
+
+
+def test_detail_omits_imageurl_when_model_has_no_image(client, db):
+    """Model linked but no photo -> no imageurl key."""
+    asset = _seed_asset('PC-2002', 'computer')
+    model = _seed_model(imageurl=None)
+    computer = Computer(assetid=asset.assetid, modelnumberid=model.modelnumberid)
+    _db.session.add(computer)
+    _db.session.commit()
+
+    resp = client.get(f'/api/computers/{computer.computerid}')
+    assert resp.status_code == 200, resp.get_json()
+    assert 'imageurl' not in resp.get_json()['data']['computer']