Adopt Foundation UI primitives

[jasonhedman]

Summary

• replace 24 compatible local UI implementations with exact Foundation registry source: Accordion, Alert Dialog, Avatar, Badge, Button, Card, Collapsible, Command, Copy Button, Dialog, Dropdown Menu, Field, Input Group, Input, Label, Select, Separator, Sheet, Skeleton, Sonner, Table, Tabs, Textarea, and Tooltip
• migrate product callsites from Radix asChild and legacy variants to the Foundation Base UI contracts
• add a product-owned ImageAvatar composition for the existing image/fallback convenience API
• remove the superseded Radix dependencies and narrow the UI integrity configuration to five approved AI Element deviations
• retain Conversation, Message, Prompt Input, Reasoning, and Tool until a coordinated AI SDK and Streamdown runtime upgrade; this is the only remaining registry adoption work in this layer

Validation

• pnpm check
• 26 of 26 Turbo tasks passed
• 205 scan app tests passed
• 8 transfer tests passed
• Foundation conformance, UI check, UI integrity, Knip, formatting, typechecks, publish checks, and boundaries passed
• pnpm build compiled successfully and passed TypeScript, then stopped during page-data collection because the local worktree does not provide the required database, CDP, proxy, Solana RPC, and other runtime environment variables

Stack

Depends on #1127.

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Project	Deployment	Actions	Updated
x402scan	Ready	Preview	Sep 4, 2026 5:46pm UTC