fix: make all pin/unpin icons show only on hover for cleaner sidebar

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

ROADMAP.md

@@ -1112,7 +1112,7 @@ The `FlowDesigner` is a canvas-based flow editor that bridges the gap between th
 > Platform-level sidebar, navigation, and grid/table UX improvements (Issue #XX).
 
 **Sidebar Navigation:**
-- [x] Pin icons show-on-hover: `SidebarMenuAction` in `NavigationRenderer` now uses `showOnHover={!item.pinned}` — unpinned items show pin icon only on hover; pinned items always show unpin icon. Applied to both `action` and leaf navigation item types.
+- [x] Pin icons show-on-hover: `SidebarMenuAction` in `NavigationRenderer` now uses `showOnHover` (always true) — all pin/unpin icons only appear on hover for a cleaner sidebar. Applied to both `action` and leaf navigation item types.
 - [x] Search placeholder contrast: Search icon in AppSidebar improved from `opacity-50` → `opacity-70` for better readability.
 - [x] Recent section position: Recent items section moved above Record Favorites in AppSidebar for quicker access to recently visited items.
 - [x] Favorites section: Already hides automatically when no pinned items exist (verified).

packages/layout/src/NavigationRenderer.tsx

@@ -449,7 +449,7 @@ function NavigationItemRenderer({
         </SidebarMenuButton>
         {enablePinning && onPinToggle && (
           <SidebarMenuAction
-            showOnHover={!item.pinned}
+            showOnHover
             onClick={() => onPinToggle(item.id, !item.pinned)}
             aria-label={item.pinned ? `Unpin ${resolveLabel(item.label, tProp)}` : `Pin ${resolveLabel(item.label, tProp)}`}
           >
@@ -502,7 +502,7 @@ function NavigationItemRenderer({
       </SidebarMenuButton>
       {enablePinning && onPinToggle && (
         <SidebarMenuAction
-          showOnHover={!item.pinned}
+          showOnHover
           onClick={() => onPinToggle(item.id, !item.pinned)}
           aria-label={item.pinned ? `Unpin ${itemLabel}` : `Pin ${itemLabel}`}
         >