feat(release): emit desktop package artifacts

[ksamaschke]

Summary

• replace desktop package-plan placeholder outputs with concrete tagged desktop artifact files
• update release signing workflow, checksums, and docs to use the final artifact filenames
• codify the packaging cutover with focused desktop release packaging tests

Testing

• npm run clean:compiled-tests && ./node_modules/.bin/tsc -p tsconfig.json && NODE_PATH="/Users/karsten/Work/Development/intelligentcode-ai/intelligent-code-agents/node_modules" node --test dist/tests/installer/desktop-release-packaging.test.js dist/tests/installer/desktop-preview-startup.test.js dist/tests/installer/bootstrap-launch.test.js
• scripts/release/build-artifacts.sh v12.3.0 HEAD

Closes #178
Closes #179
Closes #180
Closes #181

[ksamaschke]

ICA-REVIEW
ICA-REVIEW-RECEIPT
Reviewer-Stage: 3 (temp checkout)
Reviewer-Agent: reviewer (subagent)
PR: #196
Base: dev
Head-SHA: 1471b82
Date-UTC: 2026-03-14T07:44:15Z

Findings: 0
NO FINDINGS

Checks/Tests:

• isolated temp-checkout diff review (PASS)
• focused packaging regression: desktop-release-packaging, desktop-preview-startup, bootstrap-launch (PASS)
• local release artifact generation via scripts/release/build-artifacts.sh (PASS)
• required GitHub checks: memory-protection (PASS)

Notes:

• Desktop release asset names now align with the tagged workflow inputs (vX.Y.Z) end-to-end.

Result: PASS

[ksamaschke]

ICA-REVIEW
ICA-REVIEW-RECEIPT
Reviewer-Stage: 3 (temp checkout)
Reviewer-Agent: reviewer (subagent)
PR: #196
Base: dev
Head-SHA: 33d6a85
Date-UTC: 2026-03-14T07:51:15Z

Findings: 0
NO FINDINGS

Checks/Tests:

• isolated temp-checkout diff review (PASS)
• focused release regression: desktop-release-packaging, desktop-rollout-validation, desktop-preview-startup, bootstrap-launch (PASS)
• local release artifact generation via scripts/release/build-artifacts.sh (PASS)
• GitHub checks: test (PASS), memory-protection (PASS)

Notes:

• Rebase preserved the new desktop validation matrix while keeping the package cutover on final tagged artifact filenames.

Result: PASS