docs: add Code Compass README cover

[Gracy769]

Summary

Add original Code Compass cover artwork in the approved charcoal, ivory, and terracotta palette.

Changes

• Place the cover directly below the README badges.
• Keep the landing, dashboard, and Summary Explorer screenshots in a collapsible gallery.

Verification

• PNG opens at 1672 × 941 pixels.
• README image path resolves and all three product screenshots remain linked.
• Documentation and image only; no application code changed.

Summary by CodeRabbit

• Documentation
  • Added a cover image and expanded the README gallery with screenshots of the landing page, dashboard, and Summary Explorer. The dashboard and Summary Explorer screenshots are now in the expandable section.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Free

Run ID: 5ec88c7f-bd38-4350-be6c-f6b9c89b8e11

📥 Commits

Reviewing files that changed from the base of the PR and between 3f3bee7 and 5884b9b.

⛔ Files ignored due to path filters (1)

• docs/code-compass-cover.png is excluded by !**/*.png

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

The README adds a cover image and updates its expandable screenshot gallery to show the landing page, dashboard, and Summary Explorer.

Changes

README gallery

Layer / File(s)	Summary
Cover image and screenshot gallery README.md	Adds a cover image. The expandable gallery includes the landing-page screenshot alongside the dashboard and Summary Explorer, and its summary label names the landing page.

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

Architecture Summary

Architecture risk: 🔵 Low · up to 5884b

The change affects 1 system.

Changed systems: README.md

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — README.md (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in README.md: The README adds a cover image and changes the gallery’s expandable section to include the landing-page screenshot alongside the dashboard and Summary Explorer; its summary label now names the landing page as well.

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Note

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