feat(notes): update_note + delete_note -- Notizen bearbeiten/loeschen

Notes-MCP konnte nur create/read/search. Neu:
- update_note(note_id, title?, body?, notebook?): partielles PUT, nur
  gesetzte Felder; notebook verschiebt (Name->parent_id-Lookup wie create).
- delete_note(note_id, permanent=False): Default Papierkorb, permanent=True
  loescht endgueltig; Titel wird vorher gelesen fuer klare Rueckmeldung.
- Helper _put/_delete analog _post/_get.
- Test: voller CRUD-Zyklus in TestNotes (create->update->verify->delete,
  raeumt hinter sich auf). Alle Notes-Tests gruen (11 passed).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XhHNJKk3RsHgUsJ27WQSom

tests/test_all.py

@@ -468,6 +468,35 @@ class TestNotes:
         listing = tool_call(self.PORT, token, "list_notes", {"notebook": self.TEST_NOTEBOOK})
         assert note_id in listing or f"Test Note {tag}" in listing
 
+    def test_update_delete_note(self):
+        """Voller CRUD-Zyklus: create -> update (title+body) -> read verify -> delete permanent."""
+        token = get_token(self.PORT)
+        tag = f"mcptest-upd-{int(time.time())}"
+        result = tool_call(self.PORT, token, "create_note", {
+            "notebook": self.TEST_NOTEBOOK,
+            "title": f"Upd Note {tag}",
+            "body": "vorher",
+        })
+        assert "erstellt" in result.lower(), f"Create failed: {result}"
+        note_id = result.split("id: ")[1].rstrip(")").strip()
+
+        # Update title + body
+        result = tool_call(self.PORT, token, "update_note", {
+            "note_id": note_id, "title": f"Upd Note {tag} NEU", "body": f"NACHHER {tag}",
+        })
+        assert "aktualisiert" in result.lower(), f"Update failed: {result}"
+
+        body = tool_call(self.PORT, token, "read_note", {"note_id": note_id})
+        assert f"NACHHER {tag}" in body and "NEU" in body, f"Update not applied: {body[:200]}"
+
+        # Leerer Update-Aufruf gibt klare Meldung statt Fehler
+        result = tool_call(self.PORT, token, "update_note", {"note_id": note_id})
+        assert "Nichts zu aendern" in result
+
+        # Permanent loeschen (Testdaten nicht liegen lassen)
+        result = tool_call(self.PORT, token, "delete_note", {"note_id": note_id, "permanent": True})
+        assert "ENDGUELTIG" in result, f"Delete failed: {result}"
+
 
 # ============================================================
 # File Type Tests (read_file auf vorbereiteten /testdata-Dateien)