chore(website): refresh homepage inspector screenshot and remove dark toggle

[NicholasKissel]

• swap the observability inspector screenshot to the new light-only asset
• remove the light/dark toggle and dark variant logic
• update the screenshot frame aspect ratio to match the new image

[railway-app]

🚅 Deployed to the rivet-pr-5360 environment in rivet-frontend

Service	Status	Web	Updated (UTC)
frontend-cloud	😴 Sleeping (View Logs)	Web	Jul 5, 2026 at 8:36 pm
website	😴 Sleeping (View Logs)	Web	Jul 5, 2026 at 3:49 am
frontend-inspector	😴 Sleeping (View Logs)	Web	Jul 4, 2026 at 8:15 pm
kitchen-sink	😴 Sleeping (View Logs)	Web	Jul 4, 2026 at 7:12 pm
mcp-hub	✅ Success (View Logs)	Web	Jul 4, 2026 at 6:52 pm
ladle	✅ Success (View Logs)	Web	Jul 4, 2026 at 6:52 pm

[claude]

Review

Small, well-scoped cleanup: swaps the inspector screenshot for the new light-only asset and removes the now-dead light/dark toggle state, images map, and unused imports (Sun, Moon, useState).

Checked, no issues found:

• No leftover references to the removed inspectorImages/InspectorTheme/toggle code, and motion is still used elsewhere in the file (for motion.div/motion.p), so no unused imports remain.
• ObservabilitySection isn't consumed anywhere else in a way that depended on the removed exports (only actors.astro / index.astro render <ObservabilitySection /> directly).
• No CLAUDE.md conventions (website typography/theme rules) are violated by this change.

One thing worth a quick manual check before merge: inspectorAspect was changed from 2438 / 1613 to 2688 / 2018. Since this drives the aspectRatio CSS on the screenshot frame, worth confirming that 2688 / 2018 actually matches the real pixel dimensions of the new rivet-actor-inspector.png asset — a mismatch here wouldn't break the build but would show the screenshot slightly stretched/cropped in the frame. I wasn't able to fetch the asset directly to verify dimensions in this environment.

Otherwise this looks good to merge.