Fix receive and send

src/tui/screens/invitations/invitation-import/steps/InputsSelectStep.tsx

@@ -6,10 +6,11 @@
  * Shows required, selected, and change amounts.
  */
 
-import React, { useState, useEffect, useCallback } from 'react';
+import React, { useState, useEffect, useCallback, useRef } from 'react';
 import { Box, Text, useInput } from 'ink';
 import { colors, formatSatoshis } from '../../../../theme.js';
 import type { InputsSelectStepProps, SelectableUTXO } from '../types.js';
+import { autoSelectGreedyUtxos, mapUnspentOutputsToSelectable } from '../../../../../utils/invitation-flow.js';
 
 /** Default fee estimate in satoshis. */
 const DEFAULT_FEE = 500n;
@@ -64,34 +65,9 @@ export function InputsSelectStep({
         outputIdentifier: 'receiveOutput',
       });
 
-      // Map to selectable UTXOs
-      const selectable: SelectableUTXO[] = unspentOutputs.map((utxo: any) => ({
-        outpointTransactionHash: utxo.outpointTransactionHash,
-        outpointIndex: utxo.outpointIndex,
-        valueSatoshis: BigInt(utxo.valueSatoshis),
-        lockingBytecode: utxo.lockingBytecode
-          ? typeof utxo.lockingBytecode === 'string'
-            ? utxo.lockingBytecode
-            : Buffer.from(utxo.lockingBytecode).toString('hex')
-          : undefined,
-        selected: false,
-      }));
-
-      // Greedy auto-select, skipping duplicate locking bytecodes
-      let accumulated = 0n;
-      const seenBytecodes = new Set<string>();
-
-      for (const utxo of selectable) {
-        if (utxo.lockingBytecode && seenBytecodes.has(utxo.lockingBytecode)) continue;
-        if (utxo.lockingBytecode) seenBytecodes.add(utxo.lockingBytecode);
-
-        utxo.selected = true;
-        accumulated += utxo.valueSatoshis;
-
-        if (accumulated >= required + fee) break;
-      }
-
-      setUtxos(selectable);
+      const selectable = mapUnspentOutputsToSelectable(unspentOutputs);
+      const autoSelected = autoSelectGreedyUtxos(selectable, required + fee);
+      setUtxos(autoSelected as SelectableUTXO[]);
     } catch (err) {
       setError(err instanceof Error ? err.message : String(err));
     } finally {
@@ -99,9 +75,15 @@ export function InputsSelectStep({
     }
   }, [invitation, computeRequiredAmount, fee]);
 
-  // Load UTXOs on mount
+  // Load UTXOs once on mount. We use a ref guard to prevent re-firing when
+  // `loadUtxos` identity changes due to parent re-renders — each re-fire
+  // flashes the loading state, causing the visible flicker bug.
+  const hasLoadedRef = useRef(false);
   useEffect(() => {
-    if (isActive) loadUtxos();
+    if (isActive && !hasLoadedRef.current) {
+      hasLoadedRef.current = true;
+      loadUtxos();
+    }
   }, [isActive, loadUtxos]);
 
   /**