feat: enhance sidebar functionality for mobile and compact views

- Introduced a floating toggle button for mobile to show/hide the sidebar when collapsed.
- Updated sidebar behavior to completely hide on mobile when the new mobileSidebarHidden state is true.
- Added logic to conditionally render sidebar components based on screen size using the new useIsCompact hook.
- Enhanced SidebarHeader to include close and expand buttons for mobile views.
- Refactored CollapseToggleButton to hide in compact mode.
- Implemented HeaderActionsPanel for mobile actions in various views, improving accessibility and usability on smaller screens.

These changes improve the user experience on mobile devices by providing better navigation options and visibility controls.

apps/ui/src/components/views/spec-view/components/spec-header.tsx

@@ -1,4 +1,8 @@
 import { Button } from '@/components/ui/button';
+import {
+  HeaderActionsPanel,
+  HeaderActionsPanelTrigger,
+} from '@/components/ui/header-actions-panel';
 import { Save, Sparkles, Loader2, FileText, AlertCircle } from 'lucide-react';
 import { PHASE_LABELS } from '../constants';
 
@@ -13,6 +17,8 @@ interface SpecHeaderProps {
   errorMessage: string;
   onRegenerateClick: () => void;
   onSaveClick: () => void;
+  showActionsPanel: boolean;
+  onToggleActionsPanel: () => void;
 }
 
 export function SpecHeader({
@@ -26,81 +32,159 @@ export function SpecHeader({
   errorMessage,
   onRegenerateClick,
   onSaveClick,
+  showActionsPanel,
+  onToggleActionsPanel,
 }: SpecHeaderProps) {
   const isProcessing = isRegenerating || isCreating || isGeneratingFeatures;
   const phaseLabel = PHASE_LABELS[currentPhase] || currentPhase;
 
   return (
-    <div className="flex items-center justify-between p-4 border-b border-border bg-glass backdrop-blur-md">
-      <div className="flex items-center gap-3">
-        <FileText className="w-5 h-5 text-muted-foreground" />
-        <div>
-          <h1 className="text-xl font-bold">App Specification</h1>
-          <p className="text-sm text-muted-foreground">{projectPath}/.automaker/app_spec.txt</p>
+    <>
+      <div className="flex items-center justify-between p-4 border-b border-border bg-glass backdrop-blur-md">
+        <div className="flex items-center gap-3">
+          <FileText className="w-5 h-5 text-muted-foreground" />
+          <div>
+            <h1 className="text-xl font-bold">App Specification</h1>
+            <p className="text-sm text-muted-foreground">{projectPath}/.automaker/app_spec.txt</p>
+          </div>
+        </div>
+        <div className="flex items-center gap-3">
+          {/* Status indicators - always visible */}
+          {isProcessing && (
+            <div className="hidden lg:flex items-center gap-3 px-6 py-3.5 rounded-xl bg-linear-to-r from-primary/15 to-primary/5 border border-primary/30 shadow-lg backdrop-blur-md">
+              <div className="relative">
+                <Loader2 className="w-5 h-5 animate-spin text-primary shrink-0" />
+                <div className="absolute inset-0 w-5 h-5 animate-ping text-primary/20" />
+              </div>
+              <div className="flex flex-col gap-1 min-w-0">
+                <span className="text-sm font-semibold text-primary leading-tight tracking-tight">
+                  {isGeneratingFeatures
+                    ? 'Generating Features'
+                    : isCreating
+                      ? 'Generating Specification'
+                      : 'Regenerating Specification'}
+                </span>
+                {currentPhase && (
+                  <span className="text-xs text-muted-foreground/90 leading-tight font-medium">
+                    {phaseLabel}
+                  </span>
+                )}
+              </div>
+            </div>
+          )}
+          {/* Mobile processing indicator */}
+          {isProcessing && (
+            <div className="lg:hidden flex items-center gap-2 px-3 py-2 rounded-lg bg-primary/10 border border-primary/20">
+              <Loader2 className="w-4 h-4 animate-spin text-primary" />
+              <span className="text-xs font-medium text-primary">Processing...</span>
+            </div>
+          )}
+          {errorMessage && (
+            <div className="hidden lg:flex items-center gap-3 px-6 py-3.5 rounded-xl bg-linear-to-r from-destructive/15 to-destructive/5 border border-destructive/30 shadow-lg backdrop-blur-md">
+              <AlertCircle className="w-5 h-5 text-destructive shrink-0" />
+              <div className="flex flex-col gap-1 min-w-0">
+                <span className="text-sm font-semibold text-destructive leading-tight tracking-tight">
+                  Error
+                </span>
+                <span className="text-xs text-destructive/90 leading-tight font-medium">
+                  {errorMessage}
+                </span>
+              </div>
+            </div>
+          )}
+          {/* Mobile error indicator */}
+          {errorMessage && (
+            <div className="lg:hidden flex items-center gap-2 px-3 py-2 rounded-lg bg-destructive/10 border border-destructive/20">
+              <AlertCircle className="w-4 h-4 text-destructive" />
+              <span className="text-xs font-medium text-destructive">Error</span>
+            </div>
+          )}
+          {/* Desktop: show actions inline */}
+          <div className="hidden lg:flex gap-2">
+            <Button
+              size="sm"
+              variant="outline"
+              onClick={onRegenerateClick}
+              disabled={isProcessing}
+              data-testid="regenerate-spec"
+            >
+              {isRegenerating ? (
+                <Loader2 className="w-4 h-4 mr-2 animate-spin" />
+              ) : (
+                <Sparkles className="w-4 h-4 mr-2" />
+              )}
+              {isRegenerating ? 'Regenerating...' : 'Regenerate'}
+            </Button>
+            <Button
+              size="sm"
+              onClick={onSaveClick}
+              disabled={!hasChanges || isSaving || isProcessing}
+              data-testid="save-spec"
+            >
+              <Save className="w-4 h-4 mr-2" />
+              {isSaving ? 'Saving...' : hasChanges ? 'Save Changes' : 'Saved'}
+            </Button>
+          </div>
+          {/* Tablet/Mobile: show trigger for actions panel */}
+          <HeaderActionsPanelTrigger isOpen={showActionsPanel} onToggle={onToggleActionsPanel} />
         </div>
       </div>
-      <div className="flex items-center gap-3">
+
+      {/* Actions Panel (tablet/mobile) */}
+      <HeaderActionsPanel
+        isOpen={showActionsPanel}
+        onClose={onToggleActionsPanel}
+        title="Specification Actions"
+      >
+        {/* Status messages in panel */}
         {isProcessing && (
-          <div className="flex items-center gap-3 px-6 py-3.5 rounded-xl bg-linear-to-r from-primary/15 to-primary/5 border border-primary/30 shadow-lg backdrop-blur-md">
-            <div className="relative">
-              <Loader2 className="w-5 h-5 animate-spin text-primary shrink-0" />
-              <div className="absolute inset-0 w-5 h-5 animate-ping text-primary/20" />
-            </div>
-            <div className="flex flex-col gap-1 min-w-0">
-              <span className="text-sm font-semibold text-primary leading-tight tracking-tight">
+          <div className="flex items-center gap-3 p-3 rounded-lg bg-primary/10 border border-primary/20">
+            <Loader2 className="w-4 h-4 animate-spin text-primary shrink-0" />
+            <div className="flex flex-col gap-0.5 min-w-0">
+              <span className="text-sm font-medium text-primary">
                 {isGeneratingFeatures
                   ? 'Generating Features'
                   : isCreating
                     ? 'Generating Specification'
                     : 'Regenerating Specification'}
               </span>
-              {currentPhase && (
-                <span className="text-xs text-muted-foreground/90 leading-tight font-medium">
-                  {phaseLabel}
-                </span>
-              )}
+              {currentPhase && <span className="text-xs text-muted-foreground">{phaseLabel}</span>}
             </div>
           </div>
         )}
         {errorMessage && (
-          <div className="flex items-center gap-3 px-6 py-3.5 rounded-xl bg-linear-to-r from-destructive/15 to-destructive/5 border border-destructive/30 shadow-lg backdrop-blur-md">
-            <AlertCircle className="w-5 h-5 text-destructive shrink-0" />
-            <div className="flex flex-col gap-1 min-w-0">
-              <span className="text-sm font-semibold text-destructive leading-tight tracking-tight">
-                Error
-              </span>
-              <span className="text-xs text-destructive/90 leading-tight font-medium">
-                {errorMessage}
-              </span>
+          <div className="flex items-center gap-3 p-3 rounded-lg bg-destructive/10 border border-destructive/20">
+            <AlertCircle className="w-4 h-4 text-destructive shrink-0" />
+            <div className="flex flex-col gap-0.5 min-w-0">
+              <span className="text-sm font-medium text-destructive">Error</span>
+              <span className="text-xs text-destructive/80">{errorMessage}</span>
             </div>
           </div>
         )}
-        <div className="flex gap-2">
-          <Button
-            size="sm"
-            variant="outline"
-            onClick={onRegenerateClick}
-            disabled={isProcessing}
-            data-testid="regenerate-spec"
-          >
-            {isRegenerating ? (
-              <Loader2 className="w-4 h-4 mr-2 animate-spin" />
-            ) : (
-              <Sparkles className="w-4 h-4 mr-2" />
-            )}
-            {isRegenerating ? 'Regenerating...' : 'Regenerate'}
-          </Button>
-          <Button
-            size="sm"
-            onClick={onSaveClick}
-            disabled={!hasChanges || isSaving || isProcessing}
-            data-testid="save-spec"
-          >
-            <Save className="w-4 h-4 mr-2" />
-            {isSaving ? 'Saving...' : hasChanges ? 'Save Changes' : 'Saved'}
-          </Button>
-        </div>
-      </div>
-    </div>
+        <Button
+          variant="outline"
+          className="w-full justify-start"
+          onClick={onRegenerateClick}
+          disabled={isProcessing}
+          data-testid="regenerate-spec-mobile"
+        >
+          {isRegenerating ? (
+            <Loader2 className="w-4 h-4 mr-2 animate-spin" />
+          ) : (
+            <Sparkles className="w-4 h-4 mr-2" />
+          )}
+          {isRegenerating ? 'Regenerating...' : 'Regenerate'}
+        </Button>
+        <Button
+          className="w-full justify-start"
+          onClick={onSaveClick}
+          disabled={!hasChanges || isSaving || isProcessing}
+          data-testid="save-spec-mobile"
+        >
+          <Save className="w-4 h-4 mr-2" />
+          {isSaving ? 'Saving...' : hasChanges ? 'Save Changes' : 'Saved'}
+        </Button>
+      </HeaderActionsPanel>
+    </>
   );
 }