fix: restore HTML img tags broken by markdown image conversion

[liangzhuohua]

Summary

Revert the homepage files (docs/pages/index/README.md and docs/pages/index_en/README.md) to their state before commits 1bfa834 and aa5abbb.

Problem

Commits 1bfa834 and aa5abbb replaced tags inside raw HTML blocks with markdown image syntax () surrounded by blank lines. According to the CommonMark spec, a blank line terminates a raw HTML block. This caused:

• Raw HTML blocks to fragment prematurely
• Subsequent HTML tags (e.g.
  , ) to fall outside any HTML block
• Indented HTML tags (≥4 spaces) to be treated as paragraph text or indented code blocks
• Raw HTML code to render as visible text on the homepage

Changes

• Restore original tags in all raw HTML block contexts
• Remove the blank lines that were breaking HTML block parsing
• Preserve CSS class attributes on standalone images (e.g. text-center, white_border, shadow-xl)

Affected files

File Description
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ━━━━━━━━━━━━━━━━━━
docs/pages/index/README.md Chinese homepage
─────────────────────────────── ──────────────────
docs/pages/index_en/README.md English homepage

[kingo0807]

The problem was caused by changing the image file format at that time.