fix: adjust node sizes in default workflow for seed widget

Generate node height 340→400 to fit all 6 widgets, Voice Preset
height 80→100, SaveAudio position adjusted.

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

workflows/omnivoice_voice_cloning.json

@@ -20,7 +20,7 @@
       "id": 2,
       "type": "OmniVoiceVoicePreset",
       "pos": [40, 240],
-      "size": {"0": 300, "1": 80},
+      "size": {"0": 300, "1": 100},
       "flags": {},
       "order": 1,
       "mode": 0,
@@ -35,7 +35,7 @@
       "id": 3,
       "type": "OmniVoiceGenerate",
       "pos": [420, 80],
-      "size": {"0": 380, "1": 340},
+      "size": {"0": 380, "1": 400},
       "flags": {},
       "order": 2,
       "mode": 0,
@@ -60,7 +60,7 @@
     {
       "id": 4,
       "type": "SaveAudio",
-      "pos": [880, 80],
+      "pos": [880, 160],
       "size": {"0": 300, "1": 100},
       "flags": {},
       "order": 3,