fix: reprocess future posts after publish date

[puneetdixit200]

What does it do?

Fixes #5642.

When future: false hides a future-dated post, Hexo strips its tag/category relations while processing. The source cache was still saved as clean, so once the post date passed, a later hexo generate could skip the unchanged source file and leave tag/category pages missing until the post changed or the site was cleaned.

This keeps published future-dated posts dirty in the source cache while future: false, so the next generate after their publish date reprocesses the post and restores its relations.

Screenshots

N/A

Pull request tasks

• Add test cases for the changes.
• Passed the CI test.

Local verification:

• TS_NODE_CACHE=false npm_config_cache=/tmp/hexo-5671-npm-cache npx mocha test/scripts/console/generate.ts --require ts-node/register --grep "reprocesses future posts" --timeout 60000
• TS_NODE_CACHE=false npm_config_cache=/tmp/hexo-5671-npm-cache npx mocha test/scripts/processors/post.ts --require ts-node/register --timeout 60000
• npm_config_cache=/tmp/hexo-5671-npm-cache npm run build
• npm_config_cache=/tmp/hexo-5671-npm-cache npx eslint lib/plugins/processor/post.ts test/scripts/console/generate.ts
• npm_config_cache=/tmp/hexo-5671-npm-cache npm run eslint
• git diff --check

[github-actions]

How to test

git clone -b fix-future-post-cache-relations https://github.com/puneetdixit200/hexo.git
cd hexo
npm install
npm test