feat(a11y): improve keyboard and semantic controls in core UI

components/canvas/nodes/compare-node.tsx

@@ -153,17 +153,41 @@ export default function CompareNode({ id, data, selected, width }: NodeProps) {
     manualDisplayMode ?? (shouldDefaultToPreview ? "preview" : "render");
   const previewNodeWidth = Math.max(240, Math.min(640, Math.round(width ?? 500)));
 
+  const setSliderPercent = useCallback((value: number) => {
+    setSliderX(Math.max(0, Math.min(100, value)));
+  }, []);
+
+  const handleSliderKeyDown = useCallback((event: React.KeyboardEvent<HTMLButtonElement>) => {
+    let nextValue: number | null = null;
+    const step = event.shiftKey ? 10 : 2;
+
+    if (event.key === "ArrowLeft" || event.key === "ArrowDown") {
+      nextValue = sliderX - step;
+    } else if (event.key === "ArrowRight" || event.key === "ArrowUp") {
+      nextValue = sliderX + step;
+    } else if (event.key === "Home") {
+      nextValue = 0;
+    } else if (event.key === "End") {
+      nextValue = 100;
+    }
+
+    if (nextValue === null) {
+      return;
+    }
+
+    event.preventDefault();
+    event.stopPropagation();
+    setSliderPercent(nextValue);
+  }, [setSliderPercent, sliderX]);
+
   const handleMouseDown = useCallback((event: React.MouseEvent) => {
     event.stopPropagation();
 
     const move = (moveEvent: MouseEvent) => {
       if (!containerRef.current) return;
       const rect = containerRef.current.getBoundingClientRect();
-      const x = Math.max(
+      const x = Math.max(0, Math.min(1, (moveEvent.clientX - rect.left) / rect.width));
-        0,
+      setSliderPercent(x * 100);
-        Math.min(1, (moveEvent.clientX - rect.left) / rect.width),
-      );
-      setSliderX(x * 100);
     };
 
     const up = () => {
@@ -173,7 +197,7 @@ export default function CompareNode({ id, data, selected, width }: NodeProps) {
 
     window.addEventListener("mousemove", move);
     window.addEventListener("mouseup", up);
-  }, []);
+  }, [setSliderPercent]);
 
   const handleTouchStart = useCallback((event: React.TouchEvent) => {
     event.stopPropagation();
@@ -183,7 +207,7 @@ export default function CompareNode({ id, data, selected, width }: NodeProps) {
       const rect = containerRef.current.getBoundingClientRect();
       const touch = moveEvent.touches[0];
       const x = Math.max(0, Math.min(1, (touch.clientX - rect.left) / rect.width));
-      setSliderX(x * 100);
+      setSliderPercent(x * 100);
     };
 
     const end = () => {
@@ -193,7 +217,7 @@ export default function CompareNode({ id, data, selected, width }: NodeProps) {
 
     window.addEventListener("touchmove", move);
     window.addEventListener("touchend", end);
-  }, []);
+  }, [setSliderPercent]);
 
   return (
     <BaseNodeWrapper nodeType="compare" selected={selected} className="p-0">
@@ -289,9 +313,18 @@ export default function CompareNode({ id, data, selected, width }: NodeProps) {
                 className="pointer-events-none absolute bottom-0 top-0 z-10 w-0.5 bg-white shadow-md"
                 style={{ left: `${sliderX}%` }}
               />
-              <div
+              <button
-                className="pointer-events-none absolute top-1/2 z-20 -translate-x-1/2 -translate-y-1/2"
+                type="button"
+                className="nodrag absolute top-1/2 z-20 -translate-x-1/2 -translate-y-1/2 rounded-full outline-none focus-visible:ring-2 focus-visible:ring-primary/70 focus-visible:ring-offset-2"
                 style={{ left: `${sliderX}%` }}
+                onKeyDown={handleSliderKeyDown}
+                aria-label="Compare slider"
+                aria-valuemin={0}
+                aria-valuemax={100}
+                aria-valuenow={Math.round(sliderX)}
+                aria-valuetext={`${Math.round(sliderX)} percent`}
+                aria-orientation="horizontal"
+                role="slider"
               >
                 <div className="flex h-8 w-8 items-center justify-center rounded-full border border-border bg-white shadow-lg">
                   <svg width="16" height="16" viewBox="0 0 16 16" fill="none">
@@ -304,7 +337,7 @@ export default function CompareNode({ id, data, selected, width }: NodeProps) {
                     />
                   </svg>
                 </div>
-              </div>
+              </button>
             </>
           )}
 

components/dashboard/canvas-card.tsx

@@ -14,7 +14,6 @@ import {
   DialogFooter,
   DialogHeader,
   DialogTitle,
-  DialogTrigger,
 } from "@/components/ui/dialog";
 import {
   DropdownMenu,
@@ -128,20 +127,18 @@ export default function CanvasCard({ canvas, onNavigate }: CanvasCardProps) {
     <>
       <div
         className={cn(
-          "group relative flex cursor-pointer items-center gap-4 rounded-xl border bg-card p-4 text-left shadow-sm shadow-foreground/3 transition-all",
+          "group relative flex items-center gap-4 rounded-xl border bg-card p-4 text-left shadow-sm shadow-foreground/3 transition-all",
           "hover:bg-muted/60 hover:shadow-md hover:shadow-foreground/4",
+          "focus-within:ring-2 focus-within:ring-primary/50",
           isEditing && "ring-2 ring-primary/50"
         )}
-        onClick={handleCardClick}
       >
-        {/* Avatar */}
+        {isEditing ? (
+          <div className="flex min-w-0 flex-1 items-center gap-4">
             <div className="flex size-10 shrink-0 items-center justify-center rounded-lg bg-primary/8 text-sm font-semibold text-primary">
               {canvas.name.slice(0, 1).toUpperCase()}
             </div>
-
-        {/* Content */}
             <div className="min-w-0 flex-1">
-          {isEditing ? (
               <Input
                 ref={inputRef}
                 value={editName}
@@ -150,14 +147,28 @@ export default function CanvasCard({ canvas, onNavigate }: CanvasCardProps) {
                 onBlur={handleBlur}
                 disabled={isSaving}
                 autoFocus
-              onClick={(e) => e.stopPropagation()}
                 className="h-auto border bg-transparent px-1.5 py-0.5 text-sm font-medium focus-visible:ring-1"
               />
-          ) : (
-            <p className="truncate text-sm font-medium">{canvas.name}</p>
-          )}
               <p className="mt-0.5 text-xs text-muted-foreground">Canvas</p>
             </div>
+          </div>
+        ) : (
+          <button
+            type="button"
+            onClick={handleCardClick}
+            className="flex min-w-0 flex-1 items-center gap-4 rounded-md text-left outline-none focus-visible:ring-2 focus-visible:ring-primary/50"
+            aria-label={`Canvas ${canvas.name} oeffnen`}
+          >
+            <div className="flex size-10 shrink-0 items-center justify-center rounded-lg bg-primary/8 text-sm font-semibold text-primary">
+              {canvas.name.slice(0, 1).toUpperCase()}
+            </div>
+
+            <div className="min-w-0 flex-1">
+              <p className="truncate text-sm font-medium">{canvas.name}</p>
+              <p className="mt-0.5 text-xs text-muted-foreground">Canvas</p>
+            </div>
+          </button>
+        )}
 
         {/* Actions - positioned to not overlap with content */}
         {!isEditing && (
@@ -169,21 +180,14 @@ export default function CanvasCard({ canvas, onNavigate }: CanvasCardProps) {
                 <Button
                   variant="ghost"
                   size="icon"
-                  className="size-7 shrink-0 opacity-0 transition-opacity group-hover:opacity-100"
+                  className="size-7 shrink-0 opacity-0 transition-opacity group-hover:opacity-100 group-focus-within:opacity-100"
-                  onClick={(e) => e.stopPropagation()}
                 >
                   <MoreHorizontal className="size-4" />
                   <span className="sr-only">Optionen</span>
                 </Button>
               </DropdownMenuTrigger>
-              <DropdownMenuContent
+              <DropdownMenuContent align="end">
-                align="end"
+                <DropdownMenuItem onSelect={handleStartEdit}>
-                onClick={(e) => e.stopPropagation()}
-              >
-                <DropdownMenuItem
-                  onSelect={handleStartEdit}
-                  onClick={(e) => e.stopPropagation()}
-                >
                   <Pencil className="size-4" />
                   Umbenennen
                 </DropdownMenuItem>
@@ -193,7 +197,6 @@ export default function CanvasCard({ canvas, onNavigate }: CanvasCardProps) {
                   onSelect={() => {
                     setDeleteOpen(true);
                   }}
-                  onClick={(e) => e.stopPropagation()}
                 >
                   <Trash2 className="size-4" />
                   Löschen