Ark gifts: instant off-chain bearer gifts inside the gift flow

Ark can't presign a bearer spend, so an ark gift is a vtxo sent to an
ephemeral ark identity whose seed IS the link (/ag/<code>: net, amount,
32-byte secret). The claimer rebuilds the identity, reads its mailbox,
and sweeps to their own ark address — instant, free, and it works for a
brand-new empty wallet with zero on-chain footprint. The sender keeps
the secret, which is what makes revoke possible (first cosign wins).

The gift form gains an On-chain/Ark source toggle when ark balance
exists; ark gifts skip the lock/split logic entirely. Claim, choose-
wallet, already-claimed, and nostr-locked (/lg/) flows all branch by
code kind; unclaimed ark gifts list with one-tap revoke and lazily
mark themselves claimed via GetVtxoStatus. Features stay decoupled:
gifts asks for ark support via the new ctx.hook seam, so either
feature builds alone.

Also restores goHome in the feature ctx — lost in the plugin-seam
extraction, it made the already-claimed screen throw on render.

Co-Authored-By: Claude Fable 5 <[email protected]>

1 files changed, 5 insertions, 1 deletions

diff --git a/src/app.js b/src/app.js
index 4912ea1..f659097 100644
--- a/src/app.js
+++ b/src/app.js
@@ -2907,11 +2907,15 @@ async function importSnapshotFile(e) {
 // sits just before boot so every helper it captures is defined; the hooks are
 // only invoked at runtime (first render happens after loadLocale below).
 const ctx = {
-  h, ui, render, wallet, toast, copyBtn, pasteBtn, blankSend, goBack, openExternal,
+  h, ui, render, wallet, toast, copyBtn, pasteBtn, blankSend, goBack, goHome, openExternal,
   fmtAmount, unitLabel, unitTag, parseAmount, getUnit: () => unit, toggleUnit, download,
   brandHeader, activeAccount, setAccounts: (list) => { accounts = list; },
   getAccounts: () => accounts,
   claimTargets, enterWallet, activateAccount, commitAccount,
+  // cross-feature calls (e.g. gifts asking the ark feature for ark-gift
+  // support) — lazy so it resolves against the final FEATURES list, and a
+  // build without the target feature simply gets null back
+  hook: (name, ...args) => featureHook(name, ...args),
 };
 const FEATURES = buildFeatures(ctx);