test(11-01): add Wave 0 RED scaffolds for UIE-01/02/03

- Add 8 new test functions: printers_new_returns_200, create_printer_redirects,
  printers_library_no_form, patch_printer, patch_printer_not_found,
  client_detail_returns_200, client_detail_not_found, client_links_in_printer_list
- Add FIXME comments on existing POST /printers tests noting upcoming 303 change
- All new tests FAIL against current code (proper RED TDD state)
- Existing 13 tests remain GREEN

tests/test_printer_crud.py

@@ -14,6 +14,7 @@ def test_create_printer_persisted(client: TestClient) -> None:
     """POST /printers with required fields returns 200; GET /printers contains printer name."""
     from imptune.db.models import Printer
 
+    # FIXME: POST /printers will return 303 after Task 2 — update status_code assertion then
     resp = client.post(
         "/printers",
         data={
@@ -38,6 +39,7 @@ def test_create_printer_duplex(client: TestClient) -> None:
     """POST /printers with duplex_mode=LongEdge persists correctly."""
     from imptune.db.models import Printer
 
+    # FIXME: POST /printers will return 303 after Task 2 — update status_code assertion then
     resp = client.post(
         "/printers",
         data={
@@ -58,6 +60,7 @@ def test_create_printer_color_mode(client: TestClient) -> None:
     """POST /printers with color_mode not sent (unchecked) sets color_mode=False."""
     from imptune.db.models import Printer
 
+    # FIXME: POST /printers will return 303 after Task 2 — update status_code assertion then
     resp = client.post(
         "/printers",
         data={
@@ -78,6 +81,7 @@ def test_create_printer_paper_size(client: TestClient) -> None:
     """POST /printers with paper_size=Letter persists correctly."""
     from imptune.db.models import Printer
 
+    # FIXME: POST /printers will return 303 after Task 2 — update status_code assertion then
     resp = client.post(
         "/printers",
         data={
@@ -98,6 +102,7 @@ def test_create_printer_collate(client: TestClient) -> None:
     """POST /printers with collate not sent (unchecked) sets collate=False."""
     from imptune.db.models import Printer
 
+    # FIXME: POST /printers will return 303 after Task 2 — update status_code assertion then
     resp = client.post(
         "/printers",
         data={
@@ -137,6 +142,7 @@ def test_printer_grouped_by_client(client: TestClient) -> None:
     contoso = contoso_list[0]
 
     # Create printer assigned to that client
+    # FIXME: POST /printers will return 303 after Task 2 — update status_code assertion then
     resp = client.post(
         "/printers",
         data={
@@ -236,6 +242,7 @@ def test_delete_printer(client: TestClient) -> None:
     from imptune.db.models import Printer
 
     # Create a printer
+    # FIXME: POST /printers will return 303 after Task 2 — update status_code assertion then
     resp = client.post(
         "/printers",
         data={
@@ -262,3 +269,121 @@ def test_delete_printer(client: TestClient) -> None:
     # GET /printers should no longer show it
     page = client.get("/printers")
     assert "To Delete" not in page.text
+
+
+# ---------------------------------------------------------------------------
+# Wave 0 scaffolds — UIE-01 (PATCH), UIE-02 (separated form/list), UIE-03 (client detail)
+# These tests are RED until plan 01 task 2 and plans 02-03 implement the routes.
+# ---------------------------------------------------------------------------
+
+
+def test_printers_new_returns_200(client: TestClient) -> None:
+    """GET /printers/new returns 200 with the add printer form markup."""
+    resp = client.get("/printers/new")
+    assert resp.status_code == 200
+    html = resp.text
+    # Must contain form fields
+    assert 'name="name"' in html or "Printer Name" in html
+
+
+def test_create_printer_redirects(client: TestClient) -> None:
+    """POST /printers (no HX-Request header) returns 303 redirect to /printers."""
+    resp = client.post(
+        "/printers",
+        data={
+            "name": "Redirect Printer",
+            "ip_address": "192.168.2.1",
+            "port_name": "IP_192_168_2_1",
+        },
+        follow_redirects=False,
+    )
+    assert resp.status_code == 303
+    assert resp.headers["location"] == "/printers"
+
+
+def test_printers_library_no_form(client: TestClient) -> None:
+    """GET /printers does NOT contain the inline add-printer form markup."""
+    resp = client.get("/printers")
+    assert resp.status_code == 200
+    html = resp.text
+    # The inline form must be gone
+    assert 'hx-post="/printers"' not in html
+    assert "Save Printer" not in html
+
+
+def test_patch_printer(client: TestClient) -> None:
+    """PATCH /printers/{id} with updated name returns 200, updated name in response, DB updated."""
+    from imptune.db.models import Printer
+
+    printer = Printer.create(
+        name="Original Name",
+        ip_address="10.0.2.1",
+        port_name="IP_10_0_2_1",
+    )
+
+    resp = client.patch(
+        f"/printers/{printer.id}",
+        data={"name": "Updated Name"},
+    )
+    assert resp.status_code == 200
+    assert "Updated Name" in resp.text
+
+    # Verify DB update
+    updated = Printer.get_by_id(printer.id)
+    assert updated.name == "Updated Name"
+
+
+def test_patch_printer_not_found(client: TestClient) -> None:
+    """PATCH /printers/9999 returns 404."""
+    resp = client.patch("/printers/9999", data={"name": "Ghost"})
+    assert resp.status_code == 404
+
+
+def test_client_detail_returns_200(client: TestClient) -> None:
+    """GET /clients/{id} returns 200 with client name and assigned printer name."""
+    from imptune.db.models import Client, Printer
+
+    # Create client
+    cl = Client.create(name="Detail Client")
+    # Create printer assigned to that client
+    Printer.create(
+        name="Client Printer",
+        ip_address="10.0.3.1",
+        port_name="IP_10_0_3_1",
+        client=cl,
+    )
+
+    resp = client.get(f"/clients/{cl.id}")
+    assert resp.status_code == 200
+    html = resp.text
+    assert "Detail Client" in html
+    assert "Client Printer" in html
+
+
+def test_client_detail_not_found(client: TestClient) -> None:
+    """GET /clients/9999 returns 404."""
+    resp = client.get("/clients/9999")
+    assert resp.status_code == 404
+
+
+def test_client_links_in_printer_list(client: TestClient) -> None:
+    """GET /printers with a printer assigned to a client contains href to client detail."""
+    from imptune.db.models import Client, Printer
+
+    # Create client via POST /clients
+    resp = client.post("/clients", data={"name": "Link Client"})
+    assert resp.status_code == 200
+
+    cl = Client.get(Client.name == "Link Client")
+
+    # Create printer assigned to that client
+    Printer.create(
+        name="Linked Printer",
+        ip_address="10.0.4.1",
+        port_name="IP_10_0_4_1",
+        client=cl,
+    )
+
+    resp = client.get("/printers")
+    assert resp.status_code == 200
+    assert f'href="/clients/{cl.id}"' in resp.text