chore(deps): update dependency postcss to v8.5.19

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
postcss (source)	8.5.16 → 8.5.19

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Release Notes

postcss/postcss (postcss)

v8.5.19

Compare Source

• Fixed cleaning before for new nodes inserted to Root (by @​MahinAnowar).

v8.5.18

Compare Source

• Restricted loading previous source maps file to the opts.from folder for security reasons (use unsafeMap: true to disable the check).

v8.5.17

Compare Source

• Fixed Maximum call stack size exceeded error.
• Fixed Prototype hijacking for postcss.fromJSON().
• Fixed Input#origin() for unmapped end position (by @​chatman-media).

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[happy-haki]

Daily maintainer re-check (2026-07-19 00:30 UTC):

• postcss@8.5.19 publish time is 2026-07-13T10:42:25.757Z; cutoff is 2026-07-12T00:30:00Z, so it is still short of 7 full days at this run.
• Netlify preview is green, but merge remains blocked by review required and npm age policy.
• Main local gates passed: pnpm install --frozen-lockfile --ignore-scripts, pnpm lint, pnpm build; pnpm audit reports 0 vulnerabilities.