Add seasonal README gallery

[Cyber-Yichen]

Summary

• add four README preview images covering spring morning, summer afternoon, autumn evening, and winter late night
• document the August 10 Snoopy birthday smoke-test result with a dedicated preview
• update both Chinese and English READMEs and clarify that these low-resolution images are documentation-only

Why

The README now shows how date, time, season, and weather relevance affect visible scenes, including the verified birthday surprise.

Validation

• generated previews from the final scene catalog using real relevance scoring fixtures
• confirmed August 10 birthday selection across morning, afternoon, evening, and late-night fixtures
• verified all README image paths
• staged-path and secret scans passed
• no runtime assets, acquisition tools, analysis notes, or built .saver bundle are included

[Copilot]

Pull request overview

This PR enhances the project documentation by adding a seasonal/time-of-day preview gallery and a dedicated Snoopy birthday (Aug 10) smoke-test preview, in both Chinese and English READMEs, while clarifying the screenshots are low-resolution and documentation-only.

Changes:

• Added a 2×2 seasonal/time-of-day image gallery to the READMEs.
• Added an Aug 10 birthday preview image and accompanying smoke-test note.
• Updated repository media/disclaimer text to explicitly allow README-only low-res screenshots (not runtime assets).

Reviewed changes

Copilot reviewed 2 out of 7 changed files in this pull request and generated no comments.

File	Description
README.md	Adds seasonal gallery + Aug 10 birthday preview and clarifies screenshot-only documentation note (Chinese).
README_EN.md	Mirrors the seasonal gallery + Aug 10 birthday preview and disclaimer updates (English).

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: a9dce2b5da

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[chatgpt-codex-connector]

Remove committed third-party media screenshots

This image link points at newly committed screenshots captured from the Snoopy/tvOS scenes, so every clone now redistributes those Apple/Peanuts frames. That conflicts with the repository's own contribution rule that no LocalAssets/, MOV, HEIC, .saver, or other Apple/Peanuts media is included, and with the disclaimer that the repo provides no redistribution rights for third-party media. Please keep these previews out of Git, or replace them with non-third-party/generated placeholder artwork.

Useful? React with 👍 / 👎.