docs: show the browser viewer and the community channels

[sunerpy]

Summary

This makes the landing pages and the website present the browser viewer and the community channel, ahead of promoting
CodeGraph.

• READMEs (English and Chinese, kept as mirrors):

  • a viewer capture under the header, switching with the reader's theme;
  • a Visual (preview) point in Why CodeGraph;
  • a Browser viewer section: how to start it, what it reads and writes, and the Flow and Map views;
  • a Community section: GitHub Issues and the WeChat Official Account 六月水蓝, with its QR code;
  • the website (firlab.app/codegraph) in the documentation list and the header links.

  docs-check now requires the two new sections in both mirrors.

• Website (docs/site/):

  • a community page in both languages (reference/community.md);
  • the Official Account's QR code on both home pages;
  • the image lives in public/community/ and is the same file the pt-tools and Voltip sites show.

  firlab's shell gained the QrCode component and the /community/ asset checks in fix(site): 文档站搜索按钮的可访问名称与可见文字一致，pt-tools 隐私卡片恢复网格 firlab#33. The sidebar
  entry comes with the next sync.

• Quick start, step 5: the table of commands becomes the real output of search, callers, callees and
  impact, now that the kind column is padded (fix(cli): pad the kind column in search, callers, callees and impact #314).

Merge after v0.53.3 is published. The quick start's output is the v0.53.3 layout; v0.53.2 still prints the
columns run together.

Verification

• The pre-push gate (make pre-ci) passed on this head: docs-check OK on 62 Markdown files, all Rust tests and
  569 frontend tests.
• firlab's sync script ran on these pages against firlab's main shell, then the site was built and checked:
  • the contracts held: both languages, registered components, word lists and asset existence;
  • check-dist.sh passed with 26 Chinese and 25 English pages;
  • 516 links under /codegraph/ resolve, 395 of them with a fragment;
  • the QR code is on both home pages and both community pages.
• The quick-start output was pasted from the fix(cli): pad the kind column in search, callers, callees and impact #314 build, run on the sample in the page. It is re-checked
  against the published v0.53.3 before the merge.

🤖 Generated with Claude Code

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Qualify the default trail path

When CODEGRAPH_DIR selects another index directory—or for a fresh project on a Windows drive under WSL, where the default can be .codegraph-wsl—trails are written under that resolved index root rather than .codegraph/ui/trails/. This absolute claim can therefore send users auditing the viewer's filesystem writes to the wrong directory; describe the location as <index root>/ui/trails/ and update the mirrored Chinese statement as well.

AGENTS.md reference: AGENTS.md:L135-L139

Useful? React with 👍 / 👎.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@           Coverage Diff           @@
##             main     #316   +/-   ##
=======================================
  Coverage   95.07%   95.08%           
=======================================
  Files         198      198           
  Lines      109014   109014           
=======================================
+ Hits       103647   103652    +5     
+ Misses       5367     5362    -5     

see 1 file with indirect coverage changes

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