feat(sidebar): enhance sidebar navigation and improve org chart styling

src/app/(frontend)/styles.css

@@ -246,3 +246,43 @@
         @apply bg-background text-foreground;
     }
 }
+
+/*
+---break---
+*/
+
+/* Top-down ORBAT-style tree connectors */
+.org-tree-child {
+    position: relative;
+    padding-top: 1rem;
+}
+
+.org-tree-child::before {
+    content: "";
+    position: absolute;
+    top: 0;
+    left: 50%;
+    height: 1rem;
+    border-left: 2px solid var(--color-border);
+}
+
+.org-tree-child::after {
+    content: "";
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    border-top: 2px solid var(--color-border);
+}
+
+.org-tree-child:first-child::after {
+    left: 50%;
+}
+
+.org-tree-child:last-child::after {
+    right: 50%;
+}
+
+.org-tree-child:only-child::after {
+    display: none;
+}

src/components/frontend/blocks/AppSidebar.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import * as React from "react";
-import { Bolt, Send, Settings2, Shield, Users, Warehouse, Crosshair } from "lucide-react";
+import { Bolt, Send, Shield, Users, Warehouse, Crosshair } from "lucide-react";
 
 import { NavCore } from "@/components/frontend/blocks/NavCore";
 import { NavSecondary } from "@/components/frontend/blocks/NavSecondary";
@@ -32,29 +32,6 @@ const data = {
       url: "/roster",
       icon: Users,
     },
-    {
-      title: "Settings",
-      url: "#",
-      icon: Settings2,
-      items: [
-        {
-          title: "General",
-          url: "#",
-        },
-        {
-          title: "Team",
-          url: "#",
-        },
-        {
-          title: "Billing",
-          url: "#",
-        },
-        {
-          title: "Limits",
-          url: "#",
-        },
-      ],
-    },
   ],
   navIntelligence: [
     {
@@ -95,10 +72,6 @@ const data = {
           title: "Vehicles",
           url: "/logistics/vehicles",
         },
-        {
-          title: "Market",
-          url: "#",
-        },
         {
           title: "Shipments",
           url: "/logistics/shipments",
@@ -138,7 +111,7 @@ export function AppSidebar({
         <SidebarMenu>
           <SidebarMenuItem>
             <SidebarMenuButton size="lg" asChild>
-              <Link href="/src/components/static">
+              <Link href="/">
                 {/*<div className="bg-sidebar-primary text-sidebar-primary-foreground flex aspect-square size-8 items-center justify-center rounded-lg">
                   <Command className="size-4" />
                 </div>

src/components/frontend/blocks/NavCore.tsx

@@ -12,7 +12,6 @@ import {
   SidebarGroup,
   SidebarGroupLabel,
   SidebarMenu,
-  SidebarMenuAction,
   SidebarMenuButton,
   SidebarMenuItem,
   SidebarMenuSub,
@@ -41,42 +40,52 @@ export function NavCore({
     <SidebarGroup>
       <SidebarGroupLabel>{label}</SidebarGroupLabel>
       <SidebarMenu>
-        {items.map((item) => (
-          <Collapsible key={item.title} asChild defaultOpen={item.isActive}>
-            <SidebarMenuItem>
-              <SidebarMenuButton asChild tooltip={item.title}>
-                <Link href={item.url}>
-                  <item.icon />
-                  <span>{item.title}</span>
-                </Link>
-              </SidebarMenuButton>
-              {item.items?.length ? (
-                <>
-                  <CollapsibleTrigger asChild>
-                    <SidebarMenuAction className="data-[state=open]:rotate-90">
-                      <ChevronRight />
-                      <span className="sr-only">Toggle</span>
-                    </SidebarMenuAction>
-                  </CollapsibleTrigger>
-                  <CollapsibleContent>
-                    <SidebarMenuSub>
-                      {item.items?.map((subItem) => (
-                        <SidebarMenuSubItem key={subItem.title}>
-                          <SidebarMenuSubButton asChild>
-                            <Link href={subItem.url}>
-                              {subItem.icon ? <subItem.icon /> : null}
-                              <span>{subItem.title}</span>
-                            </Link>
-                          </SidebarMenuSubButton>
-                        </SidebarMenuSubItem>
-                      ))}
-                    </SidebarMenuSub>
-                  </CollapsibleContent>
-                </>
-              ) : null}
-            </SidebarMenuItem>
-          </Collapsible>
-        ))}
+        {items.map((item) => {
+          const hasChildren = (item.items?.length ?? 0) > 0;
+          return (
+            <Collapsible
+              key={item.title}
+              asChild
+              defaultOpen={item.isActive}
+              className="group/collapsible"
+            >
+              <SidebarMenuItem>
+                {hasChildren ? (
+                  <>
+                    <CollapsibleTrigger asChild>
+                      <SidebarMenuButton tooltip={item.title}>
+                        <item.icon />
+                        <span>{item.title}</span>
+                        <ChevronRight className="ml-auto transition-transform duration-200 group-data-[state=open]/collapsible:rotate-90" />
+                      </SidebarMenuButton>
+                    </CollapsibleTrigger>
+                    <CollapsibleContent>
+                      <SidebarMenuSub>
+                        {item.items?.map((subItem) => (
+                          <SidebarMenuSubItem key={subItem.title}>
+                            <SidebarMenuSubButton asChild>
+                              <Link href={subItem.url}>
+                                {subItem.icon ? <subItem.icon /> : null}
+                                <span>{subItem.title}</span>
+                              </Link>
+                            </SidebarMenuSubButton>
+                          </SidebarMenuSubItem>
+                        ))}
+                      </SidebarMenuSub>
+                    </CollapsibleContent>
+                  </>
+                ) : (
+                  <SidebarMenuButton asChild tooltip={item.title}>
+                    <Link href={item.url}>
+                      <item.icon />
+                      <span>{item.title}</span>
+                    </Link>
+                  </SidebarMenuButton>
+                )}
+              </SidebarMenuItem>
+            </Collapsible>
+          );
+        })}
       </SidebarMenu>
     </SidebarGroup>
   );

src/components/frontend/roster/RosterView.tsx

@@ -126,7 +126,7 @@ function collectAllMembers(node: TreeNode): RosterMember[] {
   return result;
 }
 
-// ─── Org Chart ──────────────────────────────────────────────────────
+// ─── Org Chart (top-down ORBAT tree) ────────────────────────────────
 
 function OrgChartView({
   assignments,
@@ -144,10 +144,12 @@ function OrgChartView({
   return (
     <div className="flex flex-col gap-4">
       {roots.length > 0 ? (
-        <div className="flex flex-col gap-3">
-          {roots.map((root) => (
-            <OrgChartNode key={root.id} node={root} depth={0} />
-          ))}
+        <div className="overflow-x-auto pb-2">
+          <div className="flex flex-col items-center gap-4 min-w-max">
+            {roots.map((root) => (
+              <OrgChartNode key={root.id} node={root} depth={0} />
+            ))}
+          </div>
         </div>
       ) : (
         <p className="text-sm text-muted-foreground">No assignments configured.</p>
@@ -171,68 +173,96 @@ function OrgChartView({
 
 function OrgChartNode({ node, depth }: { node: TreeNode; depth: number }) {
   const allMembers = collectAllMembers(node);
-  const hasChildren = node.children.length > 0;
+  const leader = node.leaderId
+    ? allMembers.find((m) => m.user.id === node.leaderId)
+    : null;
+  const directMembers = node.members.filter((m) => m.user.id !== node.leaderId);
+
+  return (
+    <div className="flex flex-col items-center">
+      <UnitBox
+        node={node}
+        depth={depth}
+        leader={leader}
+        directMembers={directMembers}
+        memberCount={allMembers.length}
+      />
+
+      {node.children.length > 0 && (
+        <>
+          <div className="h-4 w-px bg-border" />
+          <div className="flex items-start">
+            {node.children.map((child) => (
+              <div key={child.id} className="org-tree-child px-3">
+                <OrgChartNode node={child} depth={depth + 1} />
+              </div>
+            ))}
+          </div>
+        </>
+      )}
+    </div>
+  );
+}
+
+function UnitBox({
+  node,
+  depth,
+  leader,
+  directMembers,
+  memberCount,
+}: {
+  node: TreeNode;
+  depth: number;
+  leader: RosterMember | null | undefined;
+  directMembers: RosterMember[];
+  memberCount: number;
+}) {
   const depthBorders = [
     "border-l-blue-600",
     "border-l-amber-600",
     "border-l-emerald-600",
   ];
   const borderClass = depthBorders[depth] ?? "border-l-zinc-600";
-  const leader = node.leaderId
-    ? allMembers.find((m) => m.user.id === node.leaderId)
-    : null;
 
   return (
-    <div className={cn(depth > 0 && "ml-5 border-l-2 border-border pl-4")}>
-      <div
-        className={cn(
-          "border rounded-lg p-3 bg-muted/20 border-l-4",
-          borderClass,
-        )}
-      >
-        <div className="flex items-center gap-2 mb-2">
-          <Building2Icon className="size-3.5 text-muted-foreground" />
-          <span className="text-sm font-semibold">{node.name}</span>
-          <span className="text-[10px] uppercase tracking-wider text-muted-foreground bg-muted px-1.5 py-0.5 rounded font-mono">
-            {TYPE_LABELS[node.type] ?? node.type}
+    <div
+      className={cn(
+        "border rounded-lg bg-muted/20 border-l-4 p-3 w-full min-w-56 max-w-xs",
+        borderClass,
+      )}
+    >
+      <div className="flex items-center gap-2 mb-2">
+        <Building2Icon className="size-3.5 text-muted-foreground shrink-0" />
+        <span className="text-sm font-semibold truncate">{node.name}</span>
+        <span className="text-[10px] uppercase tracking-wider text-muted-foreground bg-muted px-1.5 py-0.5 rounded font-mono shrink-0">
+          {TYPE_LABELS[node.type] ?? node.type}
+        </span>
+        {node.callsign && (
+          <span className="text-[10px] text-muted-foreground font-mono shrink-0">
+            [{node.callsign}]
           </span>
-          {node.callsign && (
-            <span className="text-[10px] text-muted-foreground font-mono">
-              [{node.callsign}]
-            </span>
-          )}
-          <span className="text-[10px] text-muted-foreground ml-auto">
-            {allMembers.length} member{allMembers.length !== 1 ? "s" : ""}
-          </span>
-        </div>
-
-        {leader && (
-          <div className="mb-2">
-            <span className="text-[10px] uppercase tracking-wider text-muted-foreground flex items-center gap-1 mb-1">
-              <CrownIcon className="size-3" /> Commanding
-            </span>
-            <MemberCard member={leader} />
-          </div>
-        )}
-
-        {node.members.filter((m) => m.user.id !== node.leaderId).length > 0 && (
-          <div className="flex flex-col gap-1">
-            {node.members
-              .filter((m) => m.user.id !== node.leaderId)
-              .map((m) => (
-                <MemberCard key={m.profileId} member={m} />
-              ))}
-          </div>
-        )}
-
-        {hasChildren && (
-          <div className="mt-3 flex flex-col gap-3">
-            {node.children.map((child) => (
-              <OrgChartNode key={child.id} node={child} depth={depth + 1} />
-            ))}
-          </div>
         )}
+        <span className="text-[10px] text-muted-foreground ml-auto shrink-0">
+          {memberCount}
+        </span>
       </div>
+
+      {leader && (
+        <div className="mb-2">
+          <span className="text-[10px] uppercase tracking-wider text-muted-foreground flex items-center gap-1 mb-1">
+            <CrownIcon className="size-3" /> Commanding
+          </span>
+          <MemberCard member={leader} />
+        </div>
+      )}
+
+      {directMembers.length > 0 && (
+        <div className="flex flex-col gap-1">
+          {directMembers.map((m) => (
+            <MemberCard key={m.profileId} member={m} />
+          ))}
+        </div>
+      )}
     </div>
   );
 }