fix(dashboard): keep clickable execution chip compact

[Duang777]

Problem

PR #5341 changed the execution chip from a span to a button and gave the desktop button a 28px minimum height. The packaged browser smoke still enforces the existing 26px compact-row contract, so current main fails with Execution chip is not a compact hairline row: 28px tall.

Main failure evidence: https://github.com/loopx-project/loopx/actions/runs/36691337881/job/109809017646

Change

• Restore the desktop button minimum height to 26px.
• Keep the 44px mobile touch target unchanged.
• Preserve the button semantics, hover state, focus ring, and settings interaction from fix(chat): verify intent before handoff and adopt model edits #5341.

Verification

• npm run build
• LOOPX_PERSONAL_WORKSPACE_SCENARIO=execution-chip npm run smoke:personal-workspace-packaged
• python scripts/chat_bundle.py verify --source
• git diff --check

The packaged browser scenario passed on top of main@7e60e6999, including the 26px desktop assertion and 390px mobile viewport checks.

[Duang777]

Exact-head CI is green on c33543eaae57f33e28c82f0c85be27216bbe785b (20 passing checks, no failures or pending jobs).

The checks include Frontstage Pages, Release Artifacts, macOS and Windows desktop builds, dashboard-acceptance, chat-bundle-browser, all three TypeScript shards, TypeScript coverage, and merge-gate. This independently clears the repeated Execution chip is not a compact hairline row: 28px tall baseline failure seen on #5338 and #5344. The mobile 44px rule remains unchanged.

Ready for maintainer review; no merge action was taken.

[Duang777]

@huangruiteng @maxliux5 This exact head remains fully green and is now the dependency blocking #5344 from resolving its main conflict without retaining the old execution-chip baseline failure. Please review when available. No merge action has been taken.