Apply official OpenHCS branding across web and desktop

[trissim]

What changed

• Add one package-owned canonical OpenHCS SVG plus deterministic PNG, ICO, and ICNS projections.
• Replace the website and README placeholders with the official mark, including favicons and deployment-path validation.
• Set the Qt application and early startup-window icon through one shared Qt projection of the packaged asset.
• Brand the Windows installer executable and installed desktop shortcut while retaining the GUI-subsystem launcher from Launch Windows desktop without a console window #95.
• Brand both the macOS installer application and the installed OpenHCS application bundle, including transactional replacement and rollback of an existing launcher.
• Package every native icon encoding in the wheel and add focused resource, website, installer, and native-smoke assertions.
• Prepare synchronized package, Codex plugin, MCP bundle, and official MCP Registry metadata for patch release 0.7.2.

Architecture

openhcs.resources.brand owns the closed asset family and installed resource lookup. The website build stages the canonical SVG, Qt decodes the packaged raster through one helper, and native installers consume the packaged platform encodings. There are no independent per-surface logos or manually synchronized artwork.

openhcs.__version__ remains the release-version authority. scripts/sync_mcp_release_metadata.py produced all 0.7.2 client and registry projections.

Validation

• 50 focused brand, website, Qt, and installer tests passed.
• Real startup-child lifecycle tests passed with the packaged icon.
• Ruff, shell parsing, workflow YAML parsing, and git diff --check passed.
• The website builder produced a valid Pages artifact; a 1440x1000 Chromium render was visually inspected.
• The wheel contains SVG, PNG, ICO, and ICNS resources.
• Re-rendering the SVG at the recovered official avatar's native 420x420 size produces zero differing pixels.
• Release metadata check passes for expected version 0.7.2.
• Windows CI verifies the installed shortcut's target is a GUI-subsystem executable and its icon is the package-owned OpenHCS ICO.

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