webui: add parameter groups for the TTS and music models that had none

[CryptVenture]

Split out of #374 as requested: missing parameter groups, generative families. The analysis groups, the controls added to existing groups, the dead controls, the default overrides and the range fixes are separate PRs.

The problem

Eight TTS and music families had no group at all in model_params.json. The entire control surface of dots_tts, outetts, glm_tts and fish_audio — sampling, guidance, chunking, output format — was reachable only by hand-writing JSON into the fallback box.

The change

Groups added: dots_tts, fish_audio, glm_tts, higgs_audio_tts, muscriptor, outetts, soprano_tts, vietneu_tts — 61 controls.

Every control is named after the key its family reads. text_chunk_size and text_chunk_mode go through the shared overrides in src/framework/text/chunking.cpp:552 and :565, which dots_tts (request.cpp:85-87) and outetts (session.cpp:749) both call.

No existing group is touched, so nothing that worked before changes.

Validation

python3 -m json.tool webui/configs/model_params.json   # parses
python3 tools/check_loader_catalog_sync.py
# ok: runtime loaders, model_specs, and model_manager_v2 are in sync

Every one of the 61 control names was checked against its family's sources, or against the shared chunking helper above.

Scope

One data file, 77 added lines, no deletions. No code change. The generated bundle is deliberately excluded — catalog.ts inlines this file at frontend build time and the bundle is not byte-reproducible, so regenerating it in each PR of this split would make the PRs conflict; happy to send one bundle-regeneration PR once the series lands.

[CryptVenture]

Closing for now to stay inside the 3-concurrent-PR policy (see the discussion on #422). Nothing is wrong with the change and CI is green on it; I will reopen it as review slots free.