fix(oauth): force iFlow to always use manual code input mode

feat(oauth): support pasting raw authorization code for iFlow OAuth

feat(oauth): add iFlow auth method selector and cookie input UI

feat(oauth): add iFlow cookie fallback entrypoint in modal

feat(hf): add backup/restore controls and harden OAuth edge cases

feat(hf): add dashboard HF controls and align runtime with Spaces port defaults

Add OmniRoute codebase without binary assets