Multiple printers, printer/slot in Spoolman, kept in sync

- One worker per printer (name, IP, CC2 Control URL, own pinned host key);
  a spool sits in at most one slot of one printer, moves between printers
- Spoolman: location "<printer> Slot N" plus extra fields "drucker"/"slot"
  (created by the bridge), cleared and "Lager" on removal
- Full comparison every minute: the printer wins over manual edits of loaded
  spools; stale printer locations go to storage; own locations untouched
- Automatic migration of v1 settings, state and host key
- Status hint when a tag is still in a tray but unmapped (e.g. after
  "Take out" in CC2 Control)
- SSH test: connection drops during exec give a clean error, not a 500
- Mock environment with several printers; tests for all of the above

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014GcEk5tkfFSYD6NTF66NkC

tests/test_web.py

@@ -67,8 +67,9 @@ def test_ssh_key_upload_never_returned(tmp_path):
 
 def test_hostkey_only_from_last_test(tmp_path):
     c, _ = make_client(tmp_path)
-    r = c.post("/api/ssh/hostkey", json={"fingerprint": "SHA256:forged"}, headers=H)
+    r = c.post("/api/printers/p1/ssh/hostkey", json={"fingerprint": "SHA256:forged"}, headers=H)
     assert r.status_code == 400
+    assert c.post("/api/printers/nope/ssh/hostkey", json={"fingerprint": "x"}, headers=H).status_code == 404
 
 
 def test_tag_endpoint(tmp_path):
@@ -104,7 +105,22 @@ def test_status_and_commands(tmp_path):
     c, bridge = make_client(tmp_path)
     bridge.poll_once()
     st = c.get("/api/status").json()
-    assert len(st["slots"]) == 4 and st["dry_run"] is True
-    assert c.post("/api/cc2/enable", json={}, headers=H).status_code == 400
-    assert c.post("/api/cc2/enable", json={"confirm": True}, headers=H).json()["dry_run"] is True
-    assert c.post("/api/slots/7/release", headers=H).status_code == 404
+    assert len(st["printers"]) == 1 and len(st["printers"][0]["slots"]) == 4 and st["dry_run"] is True
+    assert c.post("/api/printers/p1/cc2/enable", json={}, headers=H).status_code == 400
+    assert c.post("/api/printers/p1/cc2/enable", json={"confirm": True}, headers=H).json()["dry_run"] is True
+    assert c.post("/api/printers/p1/slots/7/release", headers=H).status_code == 404
+    assert c.post("/api/printers/zz/slots/1/release", headers=H).status_code == 404
+
+
+def test_printers_editable(tmp_path):
+    c, _ = make_client(tmp_path)
+    s = c.get("/api/settings").json()
+    printers = s["printers"] + [{"name": "Links", "host": "10.10.2.235", "cc2_url": "http://10.10.2.235:8081"}]
+    r = c.post("/api/settings", json={"printers": printers}, headers=H)
+    assert r.status_code == 200
+    got = r.json()["printers"]
+    assert [p["name"] for p in got] == ["CC2", "Links"] and got[1]["id"].startswith("p") and got[1]["ssh_port"] == 22
+    dup = c.post("/api/settings", json={"printers": got + [{"name": "links", "host": "x", "cc2_url": "http://x"}]}, headers=H)
+    assert dup.status_code == 400
+    bad = c.post("/api/settings", json={"location_slot": "Slot {n}"}, headers=H)
+    assert bad.status_code == 400  # two printers need {printer}