chore: refactor codebase, update dependencies, and clean up files

[azdanov]

No description provided.

[Copilot]

Pull request overview

This PR is a broad cleanup/refactor pass across the Astro site, combining dependency upgrades with small utility refactors and removal of unused UI components.

Changes:

• Upgraded Astro/Tailwind/ESLint/TypeScript (and lockfile) and adjusted TS compiler options.
• Refactored permalink/canonical utilities and tightened date/time rendering in blog components.
• Removed several unused widget/components and updated content typing setup.

Reviewed changes

Copilot reviewed 16 out of 19 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tsconfig.json	Adds an explicit TS option (exactOptionalPropertyTypes).
src/utils/permalinks.ts	Refactors permalink helpers and canonical URL typing; reorders helper definitions.
src/utils/git.ts	Minor refactor for timestamp parsing; adjusts git_path declaration.
src/utils/blog.ts	Refactors normalized post object construction; improves category/tag set building loops.
src/env.d.ts	Replaces Astro reference directives with module declarations for CSS/fontsource packages.
src/content/config.ts	Removes the old Astro content collection config file.
src/config.mjs	Adds trailingSlash to site config.
src/components/widgets/Stats.astro	Removed.
src/components/widgets/FAQs.astro	Removed.
src/components/widgets/Announcement.astro	Removed.
src/components/HeroImg.astro	Removed.
src/components/common/MetaTags.astro	Refactors canonical/image handling and simplifies SEO tag generation.
src/components/Card.astro	Removed.
src/components/widgets/LegalNoticeModal.tsx	Formatting-only change.
src/components/blog/SinglePost.astro	Uses ISO datetime formatting for <time datetime>.
src/components/blog/ListItem.astro	Uses ISO datetime formatting (optionally) for <time datetime>.
package.json	Dependency updates (Astro, Tailwind, ESLint, lodash, etc.).
bun.lock	Lockfile updated to match dependency bumps.
.prettierignore	Ignores src/content/post/ from formatting.

Comments suppressed due to low confidence (2)

src/utils/git.ts:38

• let git_path; will be implicitly any under the repo’s strict TS config (previously this was initialized as a string). Please explicitly type it (e.g., string) or keep the string initializer so type-checking doesn’t fail and downstream spawnSync args stay typed.

  let git_path;
  {
    const { stdout } = spawnSync('which', ['git'], {
      encoding: 'utf-8',
    });

src/components/common/MetaTags.astro:59

• MetaTags currently ignores any openGraph / twitter props passed via meta (e.g. blog post pages build meta.openGraph.images, but this component always overwrites openGraph with a minimal object derived only from canonical + image). This prevents per-page OG settings like article type and post-specific images from being emitted; consider merging/spreading Astro.props.openGraph/Astro.props.twitter into the objects passed to AstroSeo (and avoid overriding when provided).

  openGraph={{
    url: canonical.toString(),
    title: ogTitle,
    description: description,
    type: ogType,
    images: image

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