[wufangyong973]

Fixes #49.

New contributing/style.md (nav_order 13) pins the house conventions the pages only follow by habit today: plain declarative voice, a fixed terminology table (mandate / vault / keeper / plan / charge, each pointing at the page that defines it), money-as-integers with a one-time human-readable display, language-tagged code blocks that stay runnable against testnet, phone-width table limits, sentence-case headings, and the README==index keep-in-sync rule.

Linked from a new Contributing section in SUMMARY.md and appended to the introduction of both README.md and index.md (kept in sync, as the repo invariant requires). Every cross-link was checked to resolve against the current tree.

Closes #49

[github-actions]

This pull request has merge conflicts with main. Please merge main into your branch (or rebase) and push. It will be merged automatically once CI passes.

[github-actions]

Malware and injection scan

0 blocking, 3 to review, 0 scanner error(s), 27 changed file(s).

Needs maintainer review

Rule	Location	Finding	Excerpt
unknown-binary	public/fonts/fa-brands-400.eot:1	Adds a binary file of an unexpected type.
unknown-binary	public/fonts/fa-regular-400.eot:1	Adds a binary file of an unexpected type.
unknown-binary	public/fonts/fa-solid-900.eot:1	Adds a binary file of an unexpected type.

Scanned commit 3686c5f. Full run and report

This pull request will not be merged automatically. A maintainer will review the findings; if they are false positives, they can merge it by hand. Pushing a new commit runs the scan again.