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/main.py

@@ -171,6 +171,29 @@ def send_to_tandoor():
         return jsonify({"ok": False, "error": str(exc), "trace": traceback.format_exc()})
 
 
+@app.route("/tags", methods=["GET"])
+def list_all_tags():
+    """Return existing tags from Mealie and Tandoor for autocomplete."""
+    cfg = config.load()
+    mealie_tags = []
+    tandoor_tags = []
+    if cfg.get("mealie_url") and cfg.get("mealie_api_key"):
+        try:
+            client = MealieClient(cfg["mealie_url"], cfg["mealie_api_key"],
+                                  api_url=config.MEALIE_INTERNAL_URL)
+            mealie_tags = [t["name"] for t in client.list_tags()]
+        except Exception:
+            pass
+    if cfg.get("tandoor_url") and cfg.get("tandoor_api_key"):
+        try:
+            client = TandoorClient(cfg["tandoor_url"], cfg["tandoor_api_key"],
+                                   api_url=config.TANDOOR_INTERNAL_URL)
+            tandoor_tags = [t["name"] for t in client.list_keywords()]
+        except Exception:
+            pass
+    return jsonify({"mealie": mealie_tags, "tandoor": tandoor_tags})
+
+
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 # Health
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