diff --git a/apps/desktop/src/components/claude-chat/chat-composer.tsx b/apps/desktop/src/components/claude-chat/chat-composer.tsx
index 74c7a55..e49c2f7 100644
--- a/apps/desktop/src/components/claude-chat/chat-composer.tsx
+++ b/apps/desktop/src/components/claude-chat/chat-composer.tsx
@@ -702,6 +702,7 @@ export const ChatComposer: FC<{ isOpen?: boolean }> = ({ isOpen }) => {
                     className="block h-16 w-auto object-contain"
                   />
                   <button
+                    aria-label="Remove attachment"
                     onClick={() => setPinnedContexts((prev) => prev.filter((_, idx) => idx !== i))}
                     className="absolute top-0.5 right-0.5 rounded-full bg-background/80 p-0.5 opacity-0 transition-opacity group-hover:opacity-100"
                   >
@@ -715,6 +716,7 @@ export const ChatComposer: FC<{ isOpen?: boolean }> = ({ isOpen }) => {
                 >
                   {ctx.label}
                   <button
+                    aria-label="Remove context"
                     onClick={() => setPinnedContexts((prev) => prev.filter((_, idx) => idx !== i))}
                     className="ml-0.5 rounded-sm p-0.5 transition-colors hover:bg-muted-foreground/20"
                   >
diff --git a/apps/desktop/src/components/claude-chat/chat-tab-bar.tsx b/apps/desktop/src/components/claude-chat/chat-tab-bar.tsx
index 028e969..aee5d1f 100644
--- a/apps/desktop/src/components/claude-chat/chat-tab-bar.tsx
+++ b/apps/desktop/src/components/claude-chat/chat-tab-bar.tsx
@@ -144,6 +144,7 @@ function TabButton({
         <span
           role="button"
           tabIndex={-1}
+          aria-label="Close tab"
           onClick={onClose}
           className="ml-auto shrink-0 rounded-sm p-0.5 opacity-0 transition-opacity hover:bg-muted-foreground/20 group-hover:opacity-100"
         >
diff --git a/apps/desktop/src/components/claude-chat/slash-command-picker.tsx b/apps/desktop/src/components/claude-chat/slash-command-picker.tsx
index ac99617..ab8ae16 100644
--- a/apps/desktop/src/components/claude-chat/slash-command-picker.tsx
+++ b/apps/desktop/src/components/claude-chat/slash-command-picker.tsx
@@ -573,6 +573,7 @@ export const SlashCommandPicker: FC<SlashCommandPickerProps> = ({
               </span>
             </div>
             <button
+              aria-label="Close command picker"
               onMouseDown={(e) => {
                 e.preventDefault();
                 onClose();
@@ -632,6 +633,7 @@ export const SlashCommandPicker: FC<SlashCommandPickerProps> = ({
           {/* Preview header */}
           <div className="flex items-center gap-2 border-b border-border px-3 py-2 shrink-0">
             <button
+              aria-label="Close preview"
               onMouseDown={(e) => {
                 e.preventDefault();
                 setShowPreview(false);
diff --git a/apps/desktop/src/components/workspace/editor/latex-editor.tsx b/apps/desktop/src/components/workspace/editor/latex-editor.tsx
index 65a3bfa..213ff21 100644
--- a/apps/desktop/src/components/workspace/editor/latex-editor.tsx
+++ b/apps/desktop/src/components/workspace/editor/latex-editor.tsx
@@ -816,6 +816,7 @@ export function LatexEditor() {
                   onClick={() => goToChunk(mergeChunkInfo.current <= 1 ? mergeChunkInfo.total - 1 : mergeChunkInfo.current - 2)}
                   className="rounded p-0.5 text-muted-foreground hover:bg-white/10 hover:text-foreground transition-colors"
                   title="Previous change"
+                  aria-label="Previous change"
                 >
                   <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><polyline points="18 15 12 9 6 15"/></svg>
                 </button>
@@ -823,6 +824,7 @@ export function LatexEditor() {
                   onClick={() => goToChunk(mergeChunkInfo.current >= mergeChunkInfo.total ? 0 : mergeChunkInfo.current)}
                   className="rounded p-0.5 text-muted-foreground hover:bg-white/10 hover:text-foreground transition-colors"
                   title="Next change"
+                  aria-label="Next change"
                 >
                   <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><polyline points="6 9 12 15 18 9"/></svg>
                 </button>
@@ -831,6 +833,7 @@ export function LatexEditor() {
                   onClick={acceptCurrentChunk}
                   className="rounded p-0.5 text-green-400 hover:bg-green-600/20 transition-colors"
                   title="Accept this change"
+                  aria-label="Accept this change"
                 >
                   <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><polyline points="20 6 9 17 4 12"/></svg>
                 </button>
@@ -838,6 +841,7 @@ export function LatexEditor() {
                   onClick={rejectCurrentChunk}
                   className="rounded p-0.5 text-red-400 hover:bg-red-600/20 transition-colors"
                   title="Reject this change"
+                  aria-label="Reject this change"
                 >
                   <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><line x1="18" y1="6" x2="6" y2="18"/><line x1="6" y1="6" x2="18" y2="18"/></svg>
                 </button>
diff --git a/apps/desktop/src/components/workspace/editor/selection-toolbar.tsx b/apps/desktop/src/components/workspace/editor/selection-toolbar.tsx
index d5779e2..c297209 100644
--- a/apps/desktop/src/components/workspace/editor/selection-toolbar.tsx
+++ b/apps/desktop/src/components/workspace/editor/selection-toolbar.tsx
@@ -97,6 +97,7 @@ export function SelectionToolbar({
           autoFocus
         />
         <button
+          aria-label="Send prompt"
           onClick={handleSend}
           disabled={!input.trim()}
           className="flex size-6 shrink-0 items-center justify-center rounded-full bg-primary text-primary-foreground transition-opacity disabled:opacity-30"
diff --git a/apps/desktop/src/components/workspace/history-panel.tsx b/apps/desktop/src/components/workspace/history-panel.tsx
index 94f284c..5bba050 100644
--- a/apps/desktop/src/components/workspace/history-panel.tsx
+++ b/apps/desktop/src/components/workspace/history-panel.tsx
@@ -311,6 +311,7 @@ function SnapshotRow({
                     <TagIcon className="size-2" />
                     {label}
                     <button
+                      aria-label={`Remove label ${label}`}
                       className="ml-0.5 rounded-sm opacity-0 hover:text-destructive group-hover:opacity-100"
                       onClick={(e) => { e.stopPropagation(); onRemoveLabel(label); }}
                     >