Problem

Five checks fail on main, so the Repo tests (CPU, studio), Repo tests (CPU, rest) and workflow-trigger lint shards are red on every open PR (for example #14472, #14482, #14488, #14490 and #14494). All five reproduce on main 4d7ebf5cea.

Fix

• Risky loaders: two baseline entries with reasons.
  • embeddings.py imports only the three sentence_transformers.models paths written out in a literal tuple, to wrap their import_from_string with the trust gate.
  • _require_word_tokenizer imports only after its caller has refused any tokenizer_class outside sentence_transformers.*, and only dotted identifiers.
• Branding: "Unsloth Studio" to "Unsloth" in those seven Markdown import errors and the Rust reject message. conversation-markdown-import.test.ts now matches /Unsloth Markdown/.
• Unsloth Studio: redesigned API page, multi-model support and a Run settings fix #14455 contracts: rewritten to guard what the redesign keeps:
  • the auto-switch section still follows the monitor link, and the usage examples come before both;
  • the page passes unloadActiveModel to the load controls as onUnloadActive, and eject is withheld while busy (modelLoading || unloading, feat(studio): add model picker and reload shortcut to API monitor #11223's rule);
  • the /unload call still reads the internal id from status;
  • entry rows keep w-full min-w-0;
  • the prompt/reply box keeps max-h-72 overflow-auto break-words;
  • the model id keeps min-w-0 break-all.

Verification

• The four Python files: 78 passed (5 failed on main).
• studio/frontend/tests/conversation-markdown-import.test.ts: 20 passed.
• Sabotage, each run against the rewritten tests, each failing exactly one test:
  • removing min-w-0 from the entry row, or break-words from the text box: the overflow test fails;
  • dropping unloading from busy, or passing onEject while busy: the unload test fails;
  • putting the auto-switch section above the monitor link: the order test fails.