docs: add T6 network upgrade page and partner-impact callouts

[max-digi]

Summary

Adds the T6 network upgrade page and sidebar entry, plus targeted "Coming with T6" callouts on existing pages where partners actually need to change something. Following the principle "if no changes, no breaking changes to mention" — feature-announcement callouts were intentionally left out where existing flows are unaffected.

What's in the T6 upgrade

Verified against the live specs at tips.sh:

• TIP-1028 — Address-level receive policies + ReceivePolicyGuard precompile
• TIP-1049 — Admin access keys + stateful verifyKeychain/verifyKeychainAdmin on SignatureVerifier
• TIP-1059 — 8 Bn-attodollars-per-gas discount on simple TIP-20 payment/redemption txs
• TIP-1065 — Packed TIP-20 user state (balance + rewardFlag cache in the existing slot)

Files changed

New

• src/pages/protocol/upgrades/t6.mdx — full T6 upgrade overview, integration changes, per-TIP sections

Sidebar / operator changelog

• vocs.config.ts — adds T6 sidebar entry as (Next), demotes T5 (will flip to (Latest) after Presto activates June 9)
• src/pages/guide/node/network-upgrades.mdx — adds T6 row with operator scope and the integrator action list

Callouts kept (real partner action required)

• src/pages/protocol/tip20/overview.mdx — warning callout for TIP-1065 raw-storage masking (anyone reading TIP-20 balance slots via eth_getStorageAt MUST mask the low 128 bits)
• src/pages/protocol/tip20/spec.mdx — T5 → T6 migration appendix covering TIP-1028 transfer/mint redirect and the TIP-1065 packed-slot layout
• src/pages/protocol/transactions/AccountKeychain.mdx — TIP-1049 SDK encoder/decoder note: KeyAuthorization RLP gains trailing optional is_admin? and account? fields; strict decoders MUST handle them
• src/pages/guide/payments/send-a-payment.mdx — TIP-1028 sender-side reconciliation warning: a successful TIP-20 transfer no longer guarantees delivery if the receiver has a receive policy that blocks the call; subscribe to TransferBlocked and verify the actual Transfer recipient

No callouts added (additive / opt-in, no partner action)

• TIP-403 overview (TIP-1028 is additive on TIP-403)
• Accept-a-payment guide (receive policies are receiver opt-in)
• Authorize access keys guide (admin keys are a new capability, existing access-key flows unchanged)
• Foundry SignatureVerifier SDK page (stateless verify/recover unchanged)
• Payment lane spec (TIP-1059 discount is layered on; existing payment-lane behavior unchanged)

Verification

• pnpm check:types passes
• All updated pages render in pnpm dev
• All spec claims re-verified against the spec text at tips.sh/{1028,1049,1059,1065}
• Partner-impact analysis cross-checked with the oracle

Follow-ups (gated, not included)

• Flip T5 sidebar label and status callout to (Latest) after Presto activates June 9
• Add a T5 → T6 migration appendix to tip403/spec.mdx once setReceivePolicy / validateReceivePolicy signatures are finalized in the spec

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Project	Deployment	Actions	Updated (UTC)
tempo-docs	Ready	Preview, Comment	Jun 4, 2026 2:40pm