UI ship DoD + Bizni icon-blue accents

Imported from GitHub pull request El-SaMa/oma#177 by @El-SaMa.

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Summary

• New ui-surface-dod.mdc: no UI ships without translation, responsive (375/768/1280), SEO (when public), a11y (AA + keyboard), and branding/UX (accents from product mark)
• Wire that gate into product-dod.mdc
• Bizni --bizni-signal family now matches icon blue #0068f8 (white text on fills)

DoD report (this PR)

• Translation: N/A for CSS/rules; Bizni FI strings unchanged (follow-up under new DoD)
• Responsive: CSS token swap only
• SEO: N/A
• A11y: white on #0068f8 ≈ 4.84:1 AA; filled buttons keep color:#fff !important
• Branding: accents sampled from bizni-icon-64.png (#0068f8 / deep #0052d6)

Test plan

• Hard-refresh Bizni profile: Verkkosivut is white on icon blue
• Ghost/current and map pin use blue family, not teal

Made with Cursor

<!-- hh:closed-by:https://github.com/El-SaMa/oma/pull/177 -->

Closed by UI ship DoD + Bizni icon-blue accents