Spool page for NFC links, bridge address; vendor-first new spool form

- /s/<id> shows a spool: rest in Spoolman and CC2 Control, where it is,
  last booking, history, links to Spoolman and the tag generator.
- Setting "Adresse der Bridge"; the tag generator can put <address>/s/<id>
  on the tag, so an iPhone held to the roll opens that page.
- New spool: vendor and material chosen from Spoolman, the vendor's
  filaments offered, values taken from similar filaments, duplicates
  pointed out and never created twice.

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

app/newspool.py

@@ -121,10 +121,14 @@ def create(client: Spoolman, p: dict, location: str) -> tuple[list[dict], str]:
             v = client.create_vendor(body)
             created_parts.append(f"Hersteller {vendor}")
         vendor = v["name"]
-        fbody = {k: val for k, val in p["filament"].items() if val is not None}
-        fbody["vendor_id"] = v["id"]
-        fil = client.create_filament(fbody)
-        created_parts.append(f"Filament {fil.get('name')}")
+        name = p["filament"]["name"].lower()
+        fil = next((f for f in client.filaments() if (f.get("vendor") or {}).get("id") == v["id"]
+                    and (f.get("name") or "").strip().lower() == name), None)
+        if fil is None:  # the same vendor and name again would only clutter Spoolman
+            fbody = {k: val for k, val in p["filament"].items() if val is not None}
+            fbody["vendor_id"] = v["id"]
+            fil = client.create_filament(fbody)
+            created_parts.append(f"Filament {fil.get('name')}")
     spools = []
     for _ in range(p["count"]):
         body: dict = {"filament_id": fil["id"], "location": location}