fix(choose-name): only sponsor gas for claim, not for unset

ChooseNameSummaryContent set KIT_PAYS_GAS = true unconditionally,
which hid the GasFeeSummary chip, forced hasEnoughGasBalance true,
disabled the gas-estimation error banner, and bypassed the loading
gate on the Confirm button.

But the component routes to useUnsetDomain when isUnsetting=true
(see the unsetDomainHook / vetDomainHook / veWorldSubdomainHook
switch around line 103), and useUnsetDomain does NOT pass the
kit-sponsored delegator URL — the unset path still runs through the
user-pays generic delegator. Result: the user got the
"VeChain pays" UI but the tx still tried to debit their own VTHO.

Compute KIT_PAYS_GAS = !isUnsetting so the unset path falls back to
the normal fee-token UI / balance check / estimation-error display.
All five downstream gates (shouldEstimateGas,
disableConfirmButtonDuringEstimation, hasEnoughBalance, GasFeeSummary
render, showGasEstimationError) already read KIT_PAYS_GAS and need
no additional changes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Agilulfo1820

packages/vechain-kit/src/components/AccountModal/Contents/ChooseName/ChooseNameSummaryContent.tsx

@@ -163,10 +163,13 @@ export const ChooseNameSummaryContent = ({
     const [userSelectedGasToken, setUserSelectedGasToken] =
         React.useState<GasTokenType | null>(null);
 
-    // VeChain pays gas for domain claims via the kit-sponsored delegator
-    // (see useClaimVetDomain). Skip the gas-token UI and "do you have
-    // enough VTHO" check so users with no gas tokens can still proceed.
-    const KIT_PAYS_GAS = true;
+    // VeChain pays gas for domain CLAIMS via the kit-sponsored delegator
+    // (see useClaimVetDomain / useClaimVeWorldSubdomain). The unset path
+    // (useUnsetDomain) is NOT sponsored — the user pays — so we still
+    // need the gas-token UI and balance check for that case. Drives:
+    // skip estimation, hide GasFeeSummary, force hasEnoughGasBalance,
+    // and suppress gas-estimation errors.
+    const KIT_PAYS_GAS = !isUnsetting;
 
     const shouldEstimateGas =
         !KIT_PAYS_GAS &&