define ui facing models

app/src/main/java/com/bitcointxoko/gudariwallet/data/model/ContactSummary.kt

@@ -0,0 +1,6 @@
+package com.bitcointxoko.gudariwallet.data.model
+
+data class ContactSummary(
+    val id: String,
+    val displayName: String  // localAlias → displayName → name, resolved at mapping time
+)

app/src/main/java/com/bitcointxoko/gudariwallet/data/model/PaymentFeedItem.kt

@@ -0,0 +1,44 @@
+package com.bitcointxoko.gudariwallet.data.model
+
+data class PaymentFeedItem(
+
+    // ── Identity ─────────────────────────────────────────────────────
+    val id: String,               // = paymentHash; stable LazyColumn key
+
+    // ── Row (PaymentRow) ─────────────────────────────────────────────
+    val isOutgoing: Boolean,
+    val amountSat: Long,
+    val memo: String?,
+    val contactName: String?,     // resolved: localAlias → displayName → name
+    val createdAt: Long?,
+    val time: Long?,
+    val isPending: Boolean,
+    val isFailed: Boolean,
+    val fiatCurrency: String?,
+    val fiatSatsPerUnit: Double?,
+
+    // ── Filter / search keys ─────────────────────────────────────────
+    val paymentHash: String,      // free-text search + technical detail
+    val tag: String?,             // type filter (bolt11, keysend, etc.)
+    val contactIds: Set<String>,  // contact-ID filter
+
+    // ── Detail (PaymentDetailScreen) — amounts ───────────────────────
+    val feeSat: Long?,            // shown if > 0
+
+    // ── Detail — contacts ────────────────────────────────────────────
+    val linkedContacts: List<ContactSummary>,
+
+    // ── Detail — basic info ──────────────────────────────────────────
+    val comment: String?,
+
+    // ── Detail — LNURL success action ────────────────────────────────
+    val successActionMessage: String?,
+    val successActionUrl: String?,
+    val successActionDescription: String?,
+
+    // ── Detail — technical ───────────────────────────────────────────
+    val preimage: String?,
+    val pubkey: String?,
+    val alias: String?,           // live from NodeAliasCache, fallback to snapshot
+    val bolt11: String?,
+)