feat(ui): layout polish — fill dead space, pair/box/collapse, warning weight, dialog glass

Implements the layout-improvement suggestions from the layout audit (visual arrangement
only; no functionality added or removed):

- Send/Receive: the recent-activity list now grows to fill the space below the fixed
  compose/receive card (more history visible), with a centered empty-state when there is
  none — instead of leaving dead canvas.
- Shield/Merge: pair the Fee and UTXO-Limit fields on one row to tighten vertical rhythm.
- Market: extend + frame the portfolio group-list as one contained panel (with a bottom
  edge) and center its empty-state, closing the previously un-anchored gap.
- Overlay dialogs: raise the card glass fill/border alpha (35/50 -> 60/90 of 255) so the
  dialog card reads as a distinct surface over busy backdrops (global, all overlays).
- Wallets: size the list height to the actual wallet count instead of always reserving 7
  rows, removing the large gap before the scan/create prompts (still scrolls when many).
- Contacts: width-aware address truncation shows more of the address on wide rows.
- Transfer Funds: give the "sends the full balance" warning a warning icon + color so the
  stakes stand out from the neutral result-preview lines.
- First-run wizard: collapse a completed Step 1 (Appearance) to the compact pill like
  Step 2, so a finished step is no longer taller than the active one.
- Explorer: distribute the Chain card's two stats to match the density of the sibling
  metrics grid.
- Validate Address: a "Results will appear here" caption fills the pre-interaction blank.
- Change Passphrase: add the warning banner its sibling security dialogs have.
- Migration ShowSeed: box the 24-word mnemonic grid (a GlassSectionScope behind the
  existing RenderSeedWordGrid) so the critical secret reads as a distinct artifact —
  purely visual, no seed/logic/state change.

Verified at 1280 across full-node + Lite + Windows (ctest green) and an adversarial diff
review (clean). New i18n key backfilled into all 8 languages.

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

res/lang/de.json

@@ -1672,6 +1672,7 @@
     "validate_not_mine": "Nicht im Besitz dieser Wallet",
     "validate_ownership": "Eigentum:",
     "validate_results": "Ergebnisse:",
+    "validate_results_placeholder": "Ergebnisse erscheinen hier",
     "validate_shielded_type": "Abgeschirmt (z-Adresse)",
     "validate_status": "Status:",
     "validate_title": "Adresse validieren",
@@ -1830,4 +1831,4 @@
     "your_addresses": "Ihre Adressen",
     "z_address": "Z-Adresse",
     "z_addresses": "Z-Adressen"
-}
+}

res/lang/es.json

@@ -1672,6 +1672,7 @@
     "validate_not_mine": "No es propiedad de esta cartera",
     "validate_ownership": "Propiedad:",
     "validate_results": "Resultados:",
+    "validate_results_placeholder": "Los resultados aparecerán aquí",
     "validate_shielded_type": "Protegida (dirección z)",
     "validate_status": "Estado:",
     "validate_title": "Validar Dirección",
@@ -1830,4 +1831,4 @@
     "your_addresses": "Sus Direcciones",
     "z_address": "Dirección Z",
     "z_addresses": "Direcciones Z"
-}
+}

res/lang/fr.json

@@ -1672,6 +1672,7 @@
     "validate_not_mine": "N'appartient pas à ce portefeuille",
     "validate_ownership": "Propriété :",
     "validate_results": "Résultats :",
+    "validate_results_placeholder": "Les résultats apparaîtront ici",
     "validate_shielded_type": "Blindée (z-adresse)",
     "validate_status": "Statut :",
     "validate_title": "Valider l'adresse",
@@ -1830,4 +1831,4 @@
     "your_addresses": "Vos adresses",
     "z_address": "Adresse Z",
     "z_addresses": "Adresses Z"
-}
+}

res/lang/ja.json

@@ -1669,6 +1669,7 @@
     "validate_not_mine": "このウォレットに属していません",
     "validate_ownership": "所有者：",
     "validate_results": "結果：",
+    "validate_results_placeholder": "ここに結果が表示されます",
     "validate_shielded_type": "シールド（zアドレス）",
     "validate_status": "ステータス：",
     "validate_title": "アドレスを検証",
@@ -1827,4 +1828,4 @@
     "your_addresses": "あなたのアドレス",
     "z_address": "Zアドレス",
     "z_addresses": "Zアドレス"
-}
+}

res/lang/ko.json

@@ -1671,6 +1671,7 @@
     "validate_not_mine": "이 지갑에 속하지 않음",
     "validate_ownership": "소유자:",
     "validate_results": "결과:",
+    "validate_results_placeholder": "결과가 여기에 표시됩니다",
     "validate_shielded_type": "차폐 (z 주소)",
     "validate_status": "상태:",
     "validate_title": "주소 검증",
@@ -1829,4 +1830,4 @@
     "your_addresses": "내 주소",
     "z_address": "Z 주소",
     "z_addresses": "Z 주소"
-}
+}

res/lang/pt.json

@@ -1672,6 +1672,7 @@
     "validate_not_mine": "Não pertence a esta carteira",
     "validate_ownership": "Propriedade:",
     "validate_results": "Resultados:",
+    "validate_results_placeholder": "Os resultados aparecerão aqui",
     "validate_shielded_type": "Blindado (z-endereço)",
     "validate_status": "Status:",
     "validate_title": "Validar Endereço",
@@ -1830,4 +1831,4 @@
     "your_addresses": "Seus Endereços",
     "z_address": "Endereço Z",
     "z_addresses": "Endereços Z"
-}
+}

res/lang/ru.json

@@ -1672,6 +1672,7 @@
     "validate_not_mine": "Не принадлежит этому кошельку",
     "validate_ownership": "Принадлежность:",
     "validate_results": "Результаты:",
+    "validate_results_placeholder": "Результаты появятся здесь",
     "validate_shielded_type": "Экранированный (z-адрес)",
     "validate_status": "Статус:",
     "validate_title": "Проверить адрес",
@@ -1830,4 +1831,4 @@
     "your_addresses": "Ваши адреса",
     "z_address": "Z-адрес",
     "z_addresses": "Z-адреса"
-}
+}

res/lang/zh.json

@@ -1670,6 +1670,7 @@
     "validate_not_mine": "不属于此钱包",
     "validate_ownership": "所有权：",
     "validate_results": "结果：",
+    "validate_results_placeholder": "结果将显示在此处",
     "validate_shielded_type": "屏蔽（z 地址）",
     "validate_status": "状态：",
     "validate_title": "验证地址",
@@ -1828,4 +1829,4 @@
     "your_addresses": "您的地址",
     "z_address": "Z 地址",
     "z_addresses": "Z 地址"
-}
+}