feat(modes): upscale handler (realesrgan + z-image-turbo refinement)

feat(modes): controlnet handler (turbo + union 2.1 + preprocessor)

feat(modes): t2i handler (base + turbo) with transformer swap and lora ctx

feat(upscale): realesrgan x4 wrapper with 0.5-resize bridge

feat(preprocessors): canny/depth/pose via controlnet_aux (lazy imports)

feat(lora): applied_lora ctx manager — validate, apply, revert on exit

feat(lora): safetensors header sniff + zimage key validation

feat(models): hf cache mirror (hardlink blobs, preserve snapshot symlinks, copy refs)

feat(ui): labeled_label and model_selector_html helpers

feat(theme): css rules for param info tooltips and custom model selector

refactor(tooltips): rename copy.py → tooltips.py to avoid stdlib shadow

feat(copy): tooltip strings dict — one source of truth for param descriptions

docs: amend spec + plan with param tooltips and coming-soon model placeholders

feat(models): device autodetect, vram-limit helpers, model config registry

fix(theme): preserve gradio's --font / --font-mono css vars

feat(theme): onyx amber palette + gr.themes.Base + glow CSS

chore: project scaffolding (pyproject, requirements, license, claude.md, tests)

docs: implementation plan for z-image-studio (19 tasks)

docs: initial design spec for z-image-studio