feat: tag management — scrape, edit, search existing, import to Mealie/Tandoor

- Scraper extracts tags from mindmegette.hu (<a class="tag">) and schema.org keywords
- Tag editor UI with removable chips, search/autocomplete for existing tags, custom add
- Mealie: auto-create tags via POST /api/organizers/tags, include in recipe PATCH
- Tandoor: include keywords in recipe POST (auto-created by name)
- New GET /tags endpoint returns existing tags from both services for search

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/tandoor.py

@@ -45,6 +45,22 @@ class TandoorClient:
 
         return {"version": version}
 
+    def list_keywords(self) -> list[dict]:
+        """Return all keywords as [{name, id}]."""
+        results = []
+        page_url = f"{self.api_url}/api/keyword/"
+        params = {"limit": 100, "format": "json"}
+        while page_url:
+            r = self.session.get(page_url, params=params, timeout=10)
+            if not r.ok:
+                break
+            data = r.json()
+            results.extend({"name": k["name"], "id": k["id"]}
+                           for k in data.get("results", []))
+            page_url = data.get("next")
+            params = {}  # next URL already has params
+        return results
+
     def find_duplicate(self, url: str, title: str = "") -> dict | None:
         """Check if a recipe with this source URL already exists."""
         if not url and not title:
@@ -145,10 +161,15 @@ class TandoorClient:
                 "order": 0,
             })
 
+        # Keywords (tags)
+        tag_names = recipe.get("tags", [])
+        keywords = [{"name": t} for t in tag_names] if tag_names else []
+
         return {
             "name": recipe["title"],
             "description": description,
             "source_url": original_url,
+            "keywords": keywords,
             "steps": steps,
             "servings": 1,
         }