diff --git a/PLAN.md b/PLAN.md
index 3050036..f4b0b22 100644
--- a/PLAN.md
+++ b/PLAN.md
@@ -1457,8 +1457,10 @@ provided cert) at the contour caddy; prod VPN; rollback.
       still **opens with the spinner** and fills on reconnect (global indicator + read auto-retry),
       so navigation is never dead. Pure policy unit-tested (`retry.ts`); a mock-only `window.__conn`
       hook drives a Chromium+WebKit e2e (indicator appears offline, the action disables, both clear
-      on reconnect). Other server-action buttons (chat send, profile save, …) are not yet visually
-      disabled but degrade to a safe no-op (the suppressed toast + indicator) — easy to extend.
+      on reconnect). The visual soft-disable spans the server-action buttons across the app: the
+      game bar (commit/exchange/pass/hint/resign), chat send + nudge, profile save / link / merge,
+      friends (request/respond/unfriend/block/code), New Game (auto-match + invite) and the lobby
+      hide ❌; purely local controls (board/rack/reset, menu, navigation, settings) stay live.
 
 ## Deferred TODOs (cross-stage)
 
diff --git a/ui/src/game/Chat.svelte b/ui/src/game/Chat.svelte
index f1a6dd0..10ec271 100644
--- a/ui/src/game/Chat.svelte
+++ b/ui/src/game/Chat.svelte
@@ -1,6 +1,7 @@
 <script lang="ts">
   import type { ChatMessage } from '../lib/model';
   import { t } from '../lib/i18n/index.svelte';
+  import { connection } from '../lib/connection.svelte';
 
   let {
     messages,
@@ -55,11 +56,11 @@
         bind:value={text}
         onkeydown={(e) => e.key === 'Enter' && send()}
       />
-      <button class="iconbtn" onclick={send} disabled={busy} aria-label={t('chat.send')}>⬆️</button>
+      <button class="iconbtn" onclick={send} disabled={busy || !connection.online} aria-label={t('chat.send')}>⬆️</button>
     {:else}
       <!-- A flex:1 caption keeps the nudge pinned right whether or not the cooldown text shows. -->
       <span class="cooldown">{nudgeOnCooldown ? t('chat.awaitingReply') : ''}</span>
-      <button class="iconbtn" onclick={onnudge} disabled={busy || nudgeOnCooldown} aria-label={t('chat.nudgeAction')}>🛎️</button>
+      <button class="iconbtn" onclick={onnudge} disabled={busy || nudgeOnCooldown || !connection.online} aria-label={t('chat.nudgeAction')}>🛎️</button>
     {/if}
   </div>
 </div>
diff --git a/ui/src/game/Game.svelte b/ui/src/game/Game.svelte
index 8612ee2..d10477a 100644
--- a/ui/src/game/Game.svelte
+++ b/ui/src/game/Game.svelte
@@ -794,7 +794,7 @@
   <Modal title={t('game.confirmResign')} onclose={() => (resignOpen = false)}>
     <div class="confirm-row">
       <button class="cancel" onclick={() => (resignOpen = false)}>{t('common.cancel')}</button>
-      <button class="danger" onclick={doResign}>{t('game.dropGame')}</button>
+      <button class="danger" onclick={doResign} disabled={!connection.online}>{t('game.dropGame')}</button>
     </div>
   </Modal>
 {/if}
diff --git a/ui/src/screens/Friends.svelte b/ui/src/screens/Friends.svelte
index fd5611e..e93bd77 100644
--- a/ui/src/screens/Friends.svelte
+++ b/ui/src/screens/Friends.svelte
@@ -2,6 +2,7 @@
   import { onMount } from 'svelte';
   import Screen from '../components/Screen.svelte';
   import { app, handleError, refreshNotifications, showToast } from '../lib/app.svelte';
+  import { connection } from '../lib/connection.svelte';
   import { gateway } from '../lib/gateway';
   import { t } from '../lib/i18n/index.svelte';
   import { friendCodeParam, shareLink } from '../lib/deeplink';
@@ -95,7 +96,7 @@
             inputmode="numeric"
             maxlength="6"
           />
-          <button class="btn" onclick={redeem}>{t('friends.redeem')}</button>
+          <button class="btn" onclick={redeem} disabled={!connection.online}>{t('friends.redeem')}</button>
         </div>
         {#if code}
           {@const tg = shareLink(friendCodeParam(code.code))}
@@ -112,7 +113,7 @@
             {/if}
           </div>
         {:else}
-          <button class="link" onclick={getCode}>{t('friends.getCode')}</button>
+          <button class="link" onclick={getCode} disabled={!connection.online}>{t('friends.getCode')}</button>
         {/if}
       </section>
 
@@ -123,8 +124,8 @@
             <div class="item">
               <span class="who">{r.displayName}</span>
               <span class="acts">
-                <button class="btn" onclick={() => respond(r.accountId, true)}>{t('friends.accept')}</button>
-                <button class="ghost" onclick={() => respond(r.accountId, false)}>{t('friends.decline')}</button>
+                <button class="btn" onclick={() => respond(r.accountId, true)} disabled={!connection.online}>{t('friends.accept')}</button>
+                <button class="ghost" onclick={() => respond(r.accountId, false)} disabled={!connection.online}>{t('friends.decline')}</button>
               </span>
             </div>
           {/each}
@@ -138,8 +139,8 @@
             <div class="item">
               <span class="who">{f.displayName}</span>
               <span class="acts">
-                <button class="ghost" onclick={() => remove(f.accountId)}>{t('friends.unfriend')}</button>
-                <button class="ghost danger" onclick={() => blockUser(f.accountId)}>{t('friends.block')}</button>
+                <button class="ghost" onclick={() => remove(f.accountId)} disabled={!connection.online}>{t('friends.unfriend')}</button>
+                <button class="ghost danger" onclick={() => blockUser(f.accountId)} disabled={!connection.online}>{t('friends.block')}</button>
               </span>
             </div>
           {/each}
@@ -154,7 +155,7 @@
           {#each blocked as b (b.accountId)}
             <div class="item">
               <span class="who">{b.displayName}</span>
-              <button class="ghost" onclick={() => unblock(b.accountId)}>{t('friends.unblock')}</button>
+              <button class="ghost" onclick={() => unblock(b.accountId)} disabled={!connection.online}>{t('friends.unblock')}</button>
             </div>
           {/each}
         </section>
diff --git a/ui/src/screens/Lobby.svelte b/ui/src/screens/Lobby.svelte
index 11248e4..f221a04 100644
--- a/ui/src/screens/Lobby.svelte
+++ b/ui/src/screens/Lobby.svelte
@@ -4,6 +4,7 @@
   import Menu from '../components/Menu.svelte';
   import TabBar from '../components/TabBar.svelte';
   import { app, handleError, showToast } from '../lib/app.svelte';
+  import { connection } from '../lib/connection.svelte';
   import { gateway } from '../lib/gateway';
   import { navigate } from '../lib/router.svelte';
   import { t, type MessageKey } from '../lib/i18n/index.svelte';
@@ -191,7 +192,7 @@
             {#each group.list as g (g.id)}
               <div class="rowwrap" class:revealed={group.finished && revealedId === g.id}>
                 {#if group.finished}
-                  <button class="del" onclick={() => hide(g.id)} aria-label={t('lobby.hideGame')}>❌</button>
+                  <button class="del" onclick={() => hide(g.id)} disabled={!connection.online} aria-label={t('lobby.hideGame')}>❌</button>
                 {/if}
                 <div class="row">
                   <button
diff --git a/ui/src/screens/NewGame.svelte b/ui/src/screens/NewGame.svelte
index caa27ee..3d5f4a6 100644
--- a/ui/src/screens/NewGame.svelte
+++ b/ui/src/screens/NewGame.svelte
@@ -3,6 +3,7 @@
   import Screen from '../components/Screen.svelte';
   import { gateway } from '../lib/gateway';
   import { app, handleError, showToast } from '../lib/app.svelte';
+  import { connection } from '../lib/connection.svelte';
   import { navigate } from '../lib/router.svelte';
   import { t, type MessageKey } from '../lib/i18n/index.svelte';
   import type { AccountRef, Variant } from '../lib/model';
@@ -144,7 +145,7 @@
         <p class="subtitle">{t('new.subtitle')}</p>
         <div class="variants">
           {#each variants as v (v.id)}
-            <button class="variant" onclick={() => find(v.id)}>
+            <button class="variant" onclick={() => find(v.id)} disabled={!connection.online}>
               <span class="vmain">
                 <span class="vname">{t(v.label)}</span>
                 {#if VARIANT_FLAG[v.id]}
@@ -196,7 +197,7 @@
               </select>
             </label>
           </div>
-          <button class="invite" disabled={selected.length === 0 || !inviteVariant} onclick={sendInvite}>{t('new.invite')}</button>
+          <button class="invite" disabled={selected.length === 0 || !inviteVariant || !connection.online} onclick={sendInvite}>{t('new.invite')}</button>
         </div>
       {/if}
     {/if}
diff --git a/ui/src/screens/Profile.svelte b/ui/src/screens/Profile.svelte
index 8cc48d2..fc83435 100644
--- a/ui/src/screens/Profile.svelte
+++ b/ui/src/screens/Profile.svelte
@@ -3,6 +3,7 @@
   import Modal from '../components/Modal.svelte';
   import Screen from '../components/Screen.svelte';
   import { app, applyLinkResult, handleError, logout, showToast } from '../lib/app.svelte';
+  import { connection } from '../lib/connection.svelte';
   import { gateway } from '../lib/gateway';
   import { loginWidgetAvailable, requestTelegramLogin } from '../lib/telegram';
   import { t } from '../lib/i18n/index.svelte';
@@ -209,7 +210,7 @@
             <span>{t('profile.notificationsInAppOnly')}</span>
           </label>
           <div class="formacts">
-            <button type="submit" class="btn" disabled={!formValid}>{t('common.save')}</button>
+            <button type="submit" class="btn" disabled={!formValid || !connection.online}>{t('common.save')}</button>
           </div>
         </form>
       {/if}
@@ -226,7 +227,7 @@
               placeholder={t('login.emailPlaceholder')}
               type="email"
             />
-            <button class="ghost" onclick={requestEmail} disabled={!emailOk}>{t('login.sendCode')}</button>
+            <button class="ghost" onclick={requestEmail} disabled={!emailOk || !connection.online}>{t('login.sendCode')}</button>
           </div>
         {:else}
           <div class="addrow">
@@ -237,11 +238,11 @@
               inputmode="numeric"
               maxlength="6"
             />
-            <button class="btn" onclick={confirmEmail}>{t('common.ok')}</button>
+            <button class="btn" onclick={confirmEmail} disabled={!connection.online}>{t('common.ok')}</button>
           </div>
         {/if}
         {#if telegramLinkable}
-          <button class="ghost tg" onclick={linkTelegram}>{t('profile.linkTelegram')}</button>
+          <button class="ghost tg" onclick={linkTelegram} disabled={!connection.online}>{t('profile.linkTelegram')}</button>
         {/if}
       </section>
 
@@ -257,7 +258,7 @@
       <p class="warn">{t('profile.mergeIrreversible')}</p>
       <div class="addrow end">
         <button class="ghost" onclick={() => (pendingMerge = null)}>{t('common.cancel')}</button>
-        <button class="btn" onclick={confirmMerge}>{t('profile.mergeConfirm')}</button>
+        <button class="btn" onclick={confirmMerge} disabled={!connection.online}>{t('profile.mergeConfirm')}</button>
       </div>
     </Modal>
   {/if}