feat(fee+burn+essence): 5% transparent fee, burn→close, Essence ledger + dashboard

Monetization (design Rev 4, §3.1) — transparent in-tx fee, non-custodial:
- @pyre/core: computeFeeBreakdown (single source of truth, BigInt) + FeeBreakdown
  threaded through close/burn previews; fee tests.
- @pyre/config: PYRE_TREASURY_WALLET / PYRE_FEE_BPS (500) / swap fee / max contribution.
- @pyre/solana: close-empty + burn→close now append ONE System transfer of exactly
  the disclosed fee to the treasury; rent/authority/feePayer pinned to wallet.
  buildBurnTx re-validates EVERY account on-chain and value-gates via the classifier
  (classic SPL + Token-2022) — never burns protected/valuable/NFT/unsupported;
  ignores client amount (burns real balance); whole-build rejection.
- @pyre/api: close-empty/burn endpoints carry the fee + bounded optional contribution;
  /api/receipt persists (cleanup_receipts) and records the on-chain treasury fee as
  Essence; GET /api/essence; startup migrate(). Best-effort DB (never fails receipts).
- @pyre/db: Postgres Essence ledger (rounds, cleanup_receipts, essence_contributions),
  idempotent migrations, parameterized + u64-safe.
- @pyre/web: fee preview ("reclaim · feeds the PYRE · you net" + treasury) + optional
  "feed more" slider; burn flow w/ destructive confirm; decode+match verifies the fee
  transfer (treasury + exact lamports) before signing; public "🔥 fed the PYRE" panel.

Built by agents (2 waves) + 2 audits. Security audit found a HIGH — buildBurnTx
didn't value-gate CLASSIC spl tokens (a direct API caller could burn USDC/an NFT);
FIXED (classify classic accounts too) + 2 regression tests. Integration: SHIP.
typecheck 8/8, core 91, solana 30, web build green. Live: burn preview on the dust
token shows 5% → treasury; non-empty/non-owned/valuable rejected. Nightly DB backup
cron enabled.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.env.example

@@ -42,6 +42,14 @@ PROTECTED_USD_THRESHOLD=50             # skip tokens valued above this (USD)
 MAX_PRICE_IMPACT_BPS=300               # skip swap routes above this impact
 QUOTE_MAX_AGE_MS=15000                 # skip stale quotes older than this
 
+# ---- Protocol fee (§3.1) — transparent, in-tx, non-custodial ---------------
+# The treasury receives ONLY the fee SOL (never user funds). Swap it for a
+# multisig before real volume. The fee is shown in the preview before signing.
+PYRE_TREASURY_WALLET=122CNV5ZLu6fqZFpEMUdUSQwDv2zs23pkYQhkNtSQk5k
+PYRE_FEE_BPS=500                       # 5% of reclaimed rent
+PYRE_SWAP_FEE_BPS=100                  # 1% on swaps (proceeds still go to user)
+PYRE_MAX_CONTRIBUTION_BPS=5000         # cap on the optional "feed more" extra (50%)
+
 # ---- Optional: metadata / launch (later phases) ----------------------------
 IPFS_OR_ARWEAVE_ENDPOINT=
 IPFS_OR_ARWEAVE_TOKEN=