Release 0.1.9 with aligned context controls and Agent collaboration demo

[susyimes]

What changed

• vertically align the room-compaction status and context-usage cards in the composer toolbar
• bump @susyimes/groupx from 0.1.8 to 0.1.9
• replace the README GIF with a 960×540 collaboration demo showing Codex calling Grok and Kimi through groupx.ask, then synthesizing both reviews
• document the 0.1.9 UI and README updates

Validation

• npm run typecheck
• npm test — 48 files / 485 tests passed
• npm run build
• npm pack --dry-run --json — @susyimes/groupx@0.1.9, collaboration GIF included
• Remotion key-frame review at collaboration dispatch, Grok response, Kimi response, and Codex synthesis
• git diff --check

[Copilot]

Pull request overview

This PR prepares the 0.1.9 release by tightening the composer toolbar layout (aligning context controls), updating the README collaboration demo, and bumping the package version metadata.

Changes:

• Adjust composer/context-control CSS to vertically align the compaction/status and context-usage cards.
• Update README demo GIF messaging and add 0.1.9 release notes.
• Bump package version to 0.1.9 (including lockfile).

Reviewed changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
web/styles.css	Adds min-heights and alignment tweaks to keep context/status UI elements vertically centered and consistent.
web/index.html	Updates the stylesheet cache-busting query string for the new context-control styling.
README.md	Replaces demo alt text/caption and documents the 0.1.9 UI + README updates.
package.json	Bumps package version to 0.1.9.
package-lock.json	Syncs lockfile version metadata to 0.1.9.

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