ux improvements

src/chrome/src/ui/sidepanel.html

@@ -329,6 +329,7 @@ <h2 id="new-conversation-confirm-title" data-i18n="sp.clear.title">Start a new c
         <path d="M10.29 3.86L1.82 18a2 2 0 001.71 3h16.94a2 2 0 001.71-3L13.71 3.86a2 2 0 00-3.42 0z"/><line x1="12" y1="9" x2="12" y2="13"/><line x1="12" y1="17" x2="12.01" y2="17"/>
       </svg>
       <span data-i18n="sp.mode.act.warning"></span>
+      <button id="act-warning-dismiss" type="button" data-i18n-aria-label="sp.review.close" aria-label="Dismiss">×</button>
     </div>
 
     <div id="selection-scope-banner" class="selection-scope-banner hidden" role="region" aria-labelledby="selection-scope-title">

src/chrome/src/ui/sidepanel.js

@@ -558,6 +558,7 @@ const modeToggleHighlight = (() => {
   return el;
 })();
 const actWarning = document.getElementById('act-warning');
+const actWarningDismiss = document.getElementById('act-warning-dismiss');
 const inputArea = document.getElementById('input-area');
 const slashCommandMenuEl = document.getElementById('slash-command-menu');
 const queuedMessagesEl = document.getElementById('queued-messages');
@@ -1253,9 +1254,12 @@ chrome.storage.onChanged.addListener((changes) => {
 // prompted per consequential action, so the standing banner is redundant —
 // only surface it in Act mode when the gate is disabled.
 const PERMISSION_GATE_KEY = 'askBeforeConsequentialActions';
+const ACT_WARNING_DISMISSED_KEY = 'actWarningDismissed';
 const PERMISSION_EDUCATION_KEY = 'permissionPromptEducation';
 const PERMISSION_EDUCATION_THRESHOLD = 2;
 let askBeforeConsequential = true; // gate ON by default
+let actWarningDismissed = false;
+let actWarningPreferenceLoaded = false;
 let permissionEducationState = { promptCount: 0, hintShown: false };
 
 function normalizePermissionEducationState(value) {
@@ -1365,8 +1369,10 @@ async function maybeShowPermissionEducationHint(card) {
   scrollToBottom();
 }
 
-chrome.storage.local.get(PERMISSION_GATE_KEY).then((stored) => {
+chrome.storage.local.get([PERMISSION_GATE_KEY, ACT_WARNING_DISMISSED_KEY]).then((stored) => {
   if (stored && stored[PERMISSION_GATE_KEY] === false) askBeforeConsequential = false;
+  actWarningDismissed = stored?.[ACT_WARNING_DISMISSED_KEY] === true;
+  actWarningPreferenceLoaded = true;
   updateActWarning();
   updateInputPlaceholder();
 }).catch(() => {});
@@ -1382,14 +1388,28 @@ chrome.storage.onChanged.addListener((changes) => {
     updateActWarning();
     updateInputPlaceholder();
   }
+  if (changes[ACT_WARNING_DISMISSED_KEY]) {
+    actWarningDismissed = changes[ACT_WARNING_DISMISSED_KEY].newValue === true;
+    actWarningPreferenceLoaded = true;
+    updateActWarning();
+  }
 });
 
 function updateActWarning() {
   if (!actWarning) return;
-  const show = agentMode !== 'ask' && !askBeforeConsequential;
+  const show = actWarningPreferenceLoaded
+    && !actWarningDismissed
+    && agentMode !== 'ask'
+    && !askBeforeConsequential;
   actWarning.classList.toggle('hidden', !show);
 }
 
+actWarningDismiss?.addEventListener('click', () => {
+  actWarningDismissed = true;
+  updateActWarning();
+  void chrome.storage.local.set({ [ACT_WARNING_DISMISSED_KEY]: true }).catch(() => {});
+});
+
 /**
  * Play a short chime when the agent finishes a task. Lazy-creates the Audio
  * element the first time and reuses it after that — sidepanel.html is an

src/chrome/styles/sidepanel.css

@@ -1219,12 +1219,11 @@ body {
 
 .chat-navigation {
   position: absolute;
-  left: 50%;
+  inset-inline-end: 12px;
   bottom: 12px;
   z-index: 7;
   display: inline-block;
   max-width: calc(100% - 36px);
-  transform: translateX(-50%);
   transition: transform 0.15s, opacity 0.4s ease;
 }
 
@@ -1256,7 +1255,7 @@ body {
 
 .chat-navigation:hover,
 .chat-navigation:focus-within {
-  transform: translate(-50%, -1px);
+  transform: translateY(-1px);
   opacity: 1;
   transition: transform 0.15s, opacity 0.12s ease;
 }
@@ -2081,6 +2080,37 @@ body {
   flex-shrink: 0;
 }
 
+#act-warning-dismiss {
+  display: grid;
+  place-items: center;
+  width: 30px;
+  height: 30px;
+  margin-block: -4px;
+  margin-inline-start: auto;
+  padding: 0;
+  border: 0;
+  border-radius: 6px;
+  background: transparent;
+  color: currentColor;
+  cursor: pointer;
+  font: inherit;
+  font-size: 22px;
+  font-weight: 400;
+  line-height: 1;
+  opacity: 0.72;
+}
+
+#act-warning-dismiss:hover {
+  background: color-mix(in srgb, var(--warning) 12%, transparent);
+  opacity: 1;
+}
+
+#act-warning-dismiss:focus-visible {
+  outline: 3px solid color-mix(in srgb, var(--warning) 34%, transparent);
+  outline-offset: 1px;
+  opacity: 1;
+}
+
 .selection-scope-banner {
   display: grid;
   grid-template-columns: auto minmax(0, 1fr) auto;

src/firefox/src/ui/sidepanel.html

@@ -293,6 +293,7 @@ <h2 id="new-conversation-confirm-title" data-i18n="sp.clear.title">Start a new c
         <path d="M10.29 3.86L1.82 18a2 2 0 001.71 3h16.94a2 2 0 001.71-3L13.71 3.86a2 2 0 00-3.42 0z"/><line x1="12" y1="9" x2="12" y2="13"/><line x1="12" y1="17" x2="12.01" y2="17"/>
       </svg>
       <span data-i18n="sp.mode.act.warning"></span>
+      <button id="act-warning-dismiss" type="button" data-i18n-aria-label="sp.review.close" aria-label="Dismiss">×</button>
     </div>
 
     <div id="selection-scope-banner" class="selection-scope-banner hidden" role="region" aria-labelledby="selection-scope-title">

src/firefox/src/ui/sidepanel.js

@@ -433,6 +433,7 @@ const modeToggleHighlight = (() => {
   return el;
 })();
 const actWarning = document.getElementById('act-warning');
+const actWarningDismiss = document.getElementById('act-warning-dismiss');
 const inputArea = document.getElementById('input-area');
 const slashCommandMenuEl = document.getElementById('slash-command-menu');
 const queuedMessagesEl = document.getElementById('queued-messages');
@@ -1347,9 +1348,12 @@ function isSuccessfulAskCompletion(mode, response) {
 // prompted per consequential action, so the standing banner is redundant —
 // only surface it in Act mode when the gate is disabled.
 const PERMISSION_GATE_KEY = 'askBeforeConsequentialActions';
+const ACT_WARNING_DISMISSED_KEY = 'actWarningDismissed';
 const PERMISSION_EDUCATION_KEY = 'permissionPromptEducation';
 const PERMISSION_EDUCATION_THRESHOLD = 2;
 let askBeforeConsequential = true; // gate ON by default
+let actWarningDismissed = false;
+let actWarningPreferenceLoaded = false;
 let permissionEducationState = { promptCount: 0, hintShown: false };
 
 function normalizePermissionEducationState(value) {
@@ -1459,8 +1463,10 @@ async function maybeShowPermissionEducationHint(card) {
   scrollToBottom();
 }
 
-browser.storage.local.get(PERMISSION_GATE_KEY).then((stored) => {
+browser.storage.local.get([PERMISSION_GATE_KEY, ACT_WARNING_DISMISSED_KEY]).then((stored) => {
   if (stored && stored[PERMISSION_GATE_KEY] === false) askBeforeConsequential = false;
+  actWarningDismissed = stored?.[ACT_WARNING_DISMISSED_KEY] === true;
+  actWarningPreferenceLoaded = true;
   updateActWarning();
   updateInputPlaceholder();
 }).catch(() => {});
@@ -1476,14 +1482,28 @@ browser.storage.onChanged.addListener((changes) => {
     updateActWarning();
     updateInputPlaceholder();
   }
+  if (changes[ACT_WARNING_DISMISSED_KEY]) {
+    actWarningDismissed = changes[ACT_WARNING_DISMISSED_KEY].newValue === true;
+    actWarningPreferenceLoaded = true;
+    updateActWarning();
+  }
 });
 
 function updateActWarning() {
   if (!actWarning) return;
-  const show = agentMode !== 'ask' && !askBeforeConsequential;
+  const show = actWarningPreferenceLoaded
+    && !actWarningDismissed
+    && agentMode !== 'ask'
+    && !askBeforeConsequential;
   actWarning.classList.toggle('hidden', !show);
 }
 
+actWarningDismiss?.addEventListener('click', () => {
+  actWarningDismissed = true;
+  updateActWarning();
+  void browser.storage.local.set({ [ACT_WARNING_DISMISSED_KEY]: true }).catch(() => {});
+});
+
 // Per-tab chat history (stores innerHTML of messages container).
 // Also mirrored to browser.storage.session keyed `tabChat:<tabId>` so the
 // conversation survives the sidebar being closed and reopened.

src/firefox/styles/sidepanel.css

@@ -1097,12 +1097,11 @@ body {
 
 .chat-navigation {
   position: absolute;
-  left: 50%;
+  inset-inline-end: 12px;
   bottom: 12px;
   z-index: 7;
   display: inline-block;
   max-width: calc(100% - 36px);
-  transform: translateX(-50%);
   transition: transform 0.15s, opacity 0.4s ease;
 }
 
@@ -1134,7 +1133,7 @@ body {
 
 .chat-navigation:hover,
 .chat-navigation:focus-within {
-  transform: translate(-50%, -1px);
+  transform: translateY(-1px);
   opacity: 1;
   transition: transform 0.15s, opacity 0.12s ease;
 }
@@ -1959,6 +1958,37 @@ body {
   flex-shrink: 0;
 }
 
+#act-warning-dismiss {
+  display: grid;
+  place-items: center;
+  width: 30px;
+  height: 30px;
+  margin-block: -4px;
+  margin-inline-start: auto;
+  padding: 0;
+  border: 0;
+  border-radius: 6px;
+  background: transparent;
+  color: currentColor;
+  cursor: pointer;
+  font: inherit;
+  font-size: 22px;
+  font-weight: 400;
+  line-height: 1;
+  opacity: 0.72;
+}
+
+#act-warning-dismiss:hover {
+  background: color-mix(in srgb, var(--warning) 12%, transparent);
+  opacity: 1;
+}
+
+#act-warning-dismiss:focus-visible {
+  outline: 3px solid color-mix(in srgb, var(--warning) 34%, transparent);
+  outline-offset: 1px;
+  opacity: 1;
+}
+
 .selection-scope-banner {
   display: grid;
   grid-template-columns: auto minmax(0, 1fr) auto;

test/run.js

@@ -26466,9 +26466,10 @@ test('sidepanel long replies use reading-first turn navigation', () => {
     );
     assert.match(
       css,
-      /#chat-shell \{[\s\S]*?position: relative;[\s\S]*?min-height: 0;[\s\S]*?\.chat-navigation \{[\s\S]*?position: absolute;[\s\S]*?left: 50%;[\s\S]*?transform: translateX\(-50%\);/,
-      `${label}: navigation pill should be shell-positioned and RTL-safe`,
+      /#chat-shell \{[\s\S]*?position: relative;[\s\S]*?min-height: 0;[\s\S]*?\.chat-navigation \{[\s\S]*?position: absolute;[\s\S]*?inset-inline-end: 12px;/,
+      `${label}: navigation pill should sit quietly at the shell's logical trailing edge`,
     );
+    assert.doesNotMatch(css, /\.chat-navigation \{[^}]*left: 50%;/, `${label}: navigation pill should no longer be centered over the reply`);
     assert.match(
       css,
       /\.message\.assistant\.chat-navigation-inset \.message-content \{[\s\S]*?padding-block-end: 60px;/,
@@ -26673,6 +26674,45 @@ test('sidepanel long replies use reading-first turn navigation', () => {
   }
 });
 
+test('Act-mode risk warning can be dismissed permanently', () => {
+  for (const [label, prefix, storage] of [
+    ['chrome', 'src/chrome', 'chrome'],
+    ['firefox', 'src/firefox', 'browser'],
+  ]) {
+    const panel = fs.readFileSync(path.join(ROOT, prefix, 'src/ui/sidepanel.js'), 'utf8');
+    const html = fs.readFileSync(path.join(ROOT, prefix, 'src/ui/sidepanel.html'), 'utf8');
+    const css = fs.readFileSync(path.join(ROOT, prefix, 'styles/sidepanel.css'), 'utf8');
+
+    assert.match(
+      html,
+      /id="act-warning"[\s\S]*?data-i18n="sp\.mode\.act\.warning"[\s\S]*?id="act-warning-dismiss"[\s\S]*?data-i18n-aria-label="sp\.review\.close"/,
+      `${label}: the warning should keep its copy on the left and expose an accessible close button`,
+    );
+    assert.match(
+      css,
+      /#act-warning-dismiss \{[\s\S]*?width: 30px;[\s\S]*?height: 30px;[\s\S]*?margin-inline-start: auto;[\s\S]*?font-size: 22px;/,
+      `${label}: the warning close button should be prominent and pinned to the logical right`,
+    );
+    assert.match(css, /#act-warning-dismiss:focus-visible \{[\s\S]*?outline:/, `${label}: the warning close button should have a keyboard focus treatment`);
+    assert.match(panel, /const ACT_WARNING_DISMISSED_KEY = 'actWarningDismissed';/, `${label}: permanent dismissal should have one storage key`);
+    assert.match(
+      panel,
+      new RegExp(`${storage}\\.storage\\.local\\.get\\(\\[PERMISSION_GATE_KEY, ACT_WARNING_DISMISSED_KEY\\]\\)[\\s\\S]*?actWarningDismissed = stored\\?\\.\\[ACT_WARNING_DISMISSED_KEY\\] === true;[\\s\\S]*?actWarningPreferenceLoaded = true;`),
+      `${label}: warning visibility should wait for and restore the saved dismissal`,
+    );
+    assert.match(
+      panel,
+      /function updateActWarning\(\) \{[\s\S]*?actWarningPreferenceLoaded[\s\S]*?!actWarningDismissed[\s\S]*?agentMode !== 'ask'[\s\S]*?!askBeforeConsequential/,
+      `${label}: a dismissed warning should stay hidden across mode changes`,
+    );
+    assert.match(
+      panel,
+      new RegExp(`actWarningDismiss\\?\\.addEventListener\\('click',[\\s\\S]*?actWarningDismissed = true;[\\s\\S]*?updateActWarning\\(\\);[\\s\\S]*?${storage}\\.storage\\.local\\.set\\(\\{ \\[ACT_WARNING_DISMISSED_KEY\\]: true \\}\\)`),
+      `${label}: closing the warning should hide it immediately and persist forever`,
+    );
+  }
+});
+
 test('compact clarification results settle the pending pre-card tool step', () => {
   for (const [label, panelRel] of [
     ['chrome', 'src/chrome/src/ui/sidepanel.js'],