ChemCore v1.0.0-beta.3

ChemCore v1.0.0-beta.3

This beta is a Windows installer hotfix for the Office/OLE registration step.
It keeps the beta.2 editor and engine scope, but fixes a packaging regression
that could interrupt clean installation after the desktop files had already
been extracted.

Highlights

• The NSIS installer now locates chemcore-office.exe in the installed
  application directory before falling back to the older resources
  subdirectory layout.
• Office/OLE registration first attempts machine-wide COM registration. If that
  step cannot run or returns a failure code, the installer falls back to
  current-user registration instead of aborting the whole install.
• The uninstall hook now attempts both machine-wide and current-user
  unregistration so failed or mixed-scope installs can be cleaned up more
  reliably.
• The Windows x64 installer was rebuilt and manually verified after removing
  prior install traces, registry entries, AppData state, shortcuts, and temp
  files.

Validation

The release was validated with:

npm ci
cargo build -p chemcore-office --release
npm run desktop:build

Manual Windows validation covered a clean install from the generated NSIS
installer, Office/OLE registration, uninstall-trace cleanup, and reinstallation
from the downloaded installer path.

Release Status

This remains a beta build. The installer is not code-signed yet, so Windows may
show SmartScreen warnings. A stable v1.0.0 release should wait for the
remaining packaging, signing, upgrade/uninstall, and Office workflow validation
criteria tracked in the roadmap.