release: freeze 0.9.46-alpha.1 Windows Alpha candidate source

[TheOrcDev]

Step 1 of docs/releases/windows-alpha-runbook.md: bump apps/desktop/package.json to 0.9.46 and add changelog/0.9.46-alpha.1.md (channel: alpha, platforms: [windows]). pnpm changelog:check: 47 entries valid, latest 0.9.46-alpha.1.

After merge, the candidate identity is this merge commit on main; dispatch Build Windows Alpha Candidate with release_id: 0.9.46-alpha.1 once the windows-alpha-release environment (created, reviewer-gated) has the Azure Trusted Signing variables and R2 candidate secrets from docs/windows-signing.md.

macOS is untouched: the 0.9.45 macOS feed only moves when a macOS release is uploaded.

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features

  • Introduced the first signed Windows Alpha release.
  • Added a software encoding fallback when hardware encoding is unavailable.
  • Improved startup speed and stability, including better handling of encoder stalls.
  • Added an Authenticode-signed installer to reduce “Unknown publisher” warnings.

• Documentation

  • Documented current Alpha limitations, livestreaming validation status, and upcoming auto-update support.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 7621d478-1d4e-47ff-9408-7392214ebb61

📥 Commits

Reviewing files that changed from the base of the PR and between 54229f8 and 179032b.

📒 Files selected for processing (2)

• apps/desktop/package.json
• changelog/0.9.46-alpha.1.md

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📝 Walkthrough

Walkthrough

The desktop package version changes from 0.9.45 to 0.9.46, and a dated 0.9.46-alpha.1 Windows changelog entry documents reliability, encoding, startup, signing, and known limitations.

Changes

Release metadata

Layer / File(s)	Summary
Version and changelog update apps/desktop/package.json, changelog/0.9.46-alpha.1.md	The desktop version is updated to 0.9.46, and Windows alpha release notes are added for 0.9.46-alpha.1.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Possibly related PRs

• TheOrcDev/videorc#146: Updates the same desktop version field and corresponding release changelog.
• TheOrcDev/videorc#98: Uses the same desktop versioning and release changelog workflow.
• TheOrcDev/videorc#105: Updates the same release version metadata and changelog pattern.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch release/0.9.46-alpha.1-freeze

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