hf: sync with main — procedural natural-terrain demo scene

hf: keep Hugging Face default .gitattributes (LFS patterns)

hf: Docker image + Hugging Face Space config (demo, api extra)

web: package front into the wheel (splasher/web) + persist workspace layout

chore: MIT license

chore: add ruff (lint config, CI step, fix findings)

chore: CI workflow, pyproject metadata (english), dev/file-viewer docs

web: editable path bar with Tab completion in the file browser

tests: source-from-files, keep_grid, export

web: BEV labels loaded clouds, Clouds selector + color mode, Export

engine/server: open clouds become labelable source (persistent grid), BEV export

docs: update readme for engine/web/desktop

tests: engine/protocol/server + english

web: vanilla front (BEV/3D/cameras, themes, file viewer)

app: drop Qt front, CLI (apairo/empty/serve), packaging

server: API, web static serving, file browser, desktop app

engine: headless Session + semantic ViewState

core: english docs, sensor placement, BEV field modes, safer accumulate

chore: gitignore build artifacts, untrack __pycache__

Splasher V1.0