fix: remove body field badge, improve sidebar tree styling, use doc titles in homepage tree

- STANDARD_KEYS now includes 'body' to prevent it from rendering as a custom field badge
- Sidebar: tree-style with border-l + ml-2 indentation per level, section separators with border-b, better depth cues
- Homepage buildFolderTree: uses doc.title from DB (not path segments), so _index shows 'CTF Writeups' instead of 'Index'
- Sidebar: _index path segments no longer show leading-space titles (slugToTitle filters empty)

apps/web/app/[section]/[...slug]/page.tsx

@@ -325,7 +325,8 @@ export default async function DocPage({ params, searchParams }: DocPageProps) {
   // Any other key in the document metadata becomes a dynamic badge.
   const STANDARD_KEYS = new Set([
     "id", "slug", "title", "type", "section", "status",
-    "author", "tags", "path", "createdAt", "updatedAt", "extraFields",
+    "author", "tags", "path", "createdAt", "updatedAt",
+    "extraFields", "body",
   ]);
 
   // Edit mode: inline form

apps/web/app/components/Sidebar.tsx

@@ -30,7 +30,7 @@ function buildFolderTree(docs: Doc[], section: string): TreeNode[] {
 
   for (const doc of docs.filter((d) => d.section === section)) {
     const parts = doc.slug.split("/");
-    // parts[0] should be the section
+    // parts[0] is the section; skip it
     let current = root;
 
     for (let i = 1; i < parts.length; i++) {
@@ -56,7 +56,7 @@ function buildFolderTree(docs: Doc[], section: string): TreeNode[] {
       } else if (!node.title) {
         node.title = part
           .split(/[-_]/)
-          .map((w) => w.charAt(0).toUpperCase() + w.slice(1))
+          .map((w) => (w ? w.charAt(0).toUpperCase() + w.slice(1) : ""))
           .join(" ");
       }
       current = node.children;
@@ -91,6 +91,7 @@ function buildFolderTree(docs: Doc[], section: string): TreeNode[] {
 
 /**
  * Recursively render the folder tree with proper depth styling.
+ * Each level gets a 20px left margin + subtle border for visual hierarchy.
  */
 function renderTreeNode(
   node: TreeNode,
@@ -100,24 +101,24 @@ function renderTreeNode(
   const isFolder = node.children.length > 0;
   const isActive = pathname === `/${node.slug}`;
   const hasActiveChild = pathname.startsWith(`/${node.slug}/`);
-  const indent = depth * 16; // 16px per level
 
   return (
-    <li key={node.slug}>
+    <li key={node.slug} className={depth > 0 ? "ml-5 border-l border-[#1f2022] pl-2" : ""}>
       <Link
         href={`/${node.slug}`}
-        className={`flex items-center gap-1.5 text-xs py-1 px-2 rounded transition-all ${
+        className={`flex items-center justify-between gap-1.5 text-xs py-1 px-2 rounded transition-all ${
           isActive
             ? "text-[#7170ff] bg-[#191a1b]"
             : hasActiveChild
               ? "text-[#d0d6e0]"
               : "text-[#8a8f98] hover:text-[#d0d6e0] hover:bg-[#191a1b]"
         }`}
-        style={{ marginLeft: `${indent}px` }}
         title={node.title}
       >
+        <span className="flex items-center gap-1.5 truncate">
           <span>{isFolder ? "📁" : "📄"}</span>
-        <span className="truncate">{node.title || node.name}</span>
+          {node.title || node.name}
+        </span>
         {isFolder && node.docCount > 0 && (
           <span className="ml-auto text-[#62666d] bg-[#191a1b] px-1 py-0 rounded">
             {node.docCount}
@@ -125,7 +126,7 @@ function renderTreeNode(
         )}
       </Link>
       {node.children.length > 0 && (
-        <ul className="mt-0.5">
+        <ul className="mt-0.5 space-y-0.5">
           {node.children.map((child) => renderTreeNode(child, depth + 1, pathname))}
         </ul>
       )}
@@ -156,7 +157,7 @@ export default function Sidebar() {
           {docs.length} documents
         </span>
       </div>
-      <ul className="space-y-2 px-3 text-sm">
+      <ul className="space-y-3 px-3 text-sm">
         {SECTIONS.map(({ id, label, icon }) => {
           const sectionDocs = docs.filter((d) => d.section === id);
           if (sectionDocs.length === 0) return null;
@@ -165,16 +166,18 @@ export default function Sidebar() {
           const isActive = pathname === `/${id}` || pathname.startsWith(`/${id}/`);
 
           return (
-            <li key={id}>
+            <li key={id} className="border-b border-[#141516] pb-2 last:border-0">
               <div
-                className={`flex items-center gap-1.5 mb-1 mt-4 first:mt-0 ${
+                className={`flex items-center gap-1.5 mb-1.5 ${
                   isActive ? "text-[#7170ff]" : "text-[#62666d]"
                 }`}
               >
-                <span>{icon}</span>
-                <span className="text-xs font-medium">{label}</span>
+                <span className="text-lg">{icon}</span>
+                <span className="font-medium text-xs uppercase tracking-wider">
+                  {label}
+                </span>
               </div>
-              <ul className="space-y-0.5 pl-0">
+              <ul className="space-y-0.5">
                 {tree.map((node) => renderTreeNode(node, 0, pathname))}
               </ul>
             </li>

apps/web/app/page.tsx

@@ -5,8 +5,8 @@ import { SECTIONS } from "@mcpedia/config/sections";
 export const dynamic = "force-dynamic";
 
 /**
- * Build a hierarchical folder tree from a flat list of document paths.
- * Each tree node is either a folder (has children) or a leaf doc.
+ * Build a hierarchical folder tree from document list.
+ * Each node is either a folder (has children) or a leaf doc.
  */
 interface TreeNode {
   name: string;
@@ -16,16 +16,25 @@ interface TreeNode {
   isLeaf: boolean;
 }
 
-function buildFolderTree(paths: string[], section: string): TreeNode[] {
-  const tree: TreeNode[] = [];
-  const base = `${section}/`;
+// Helper: turn a slug segment into a display title
+function slugToTitle(segment: string): string {
+  return segment
+    .split(/[-_]/)
+    .map((w) => (w ? w.charAt(0).toUpperCase() + w.slice(1) : ""))
+    .join(" ");
+}
 
-  const addPath = (cleanPath: string) => {
-    const parts = cleanPath.split("/");
+function buildFolderTree(docs: { slug: string; title: string }[], section: string): TreeNode[] {
+  const tree: TreeNode[] = [];
+  const treeIndex = new Map<string, TreeNode>();
+
+  for (const doc of docs) {
+    const parts = doc.slug.split("/");
+    // parts[0] should be the section
     let current = tree;
     let currentPath = section;
 
-    for (let i = 0; i < parts.length; i++) {
+    for (let i = 1; i < parts.length; i++) {
       const part = parts[i];
       const isLeaf = i === parts.length - 1;
       currentPath = `${currentPath}/${part}`;
@@ -35,36 +44,43 @@ function buildFolderTree(paths: string[], section: string): TreeNode[] {
         node = {
           name: part,
           slug: currentPath,
-          title: "",
+          title: isLeaf ? doc.title : slugToTitle(part),
           children: [],
           isLeaf: false,
         };
         current.push(node);
+        treeIndex.set(currentPath, node);
       }
 
       if (isLeaf) {
         node.isLeaf = true;
-        node.title = part
-          .split(/[-_]/)
-          .map((w) => w.charAt(0).toUpperCase() + w.slice(1))
-          .join(" ");
+        node.title = doc.title;
       } else if (!node.title) {
-        node.title = part
-          .split(/[-_]/)
-          .map((w) => w.charAt(0).toUpperCase() + w.slice(1))
-          .join(" ");
+        node.title = slugToTitle(part);
       }
       current = node.children;
     }
-  };
-
-  for (const docPath of paths) {
-    const rel = docPath.startsWith(base) ? docPath.slice(base.length) : docPath;
-    const cleanPath = rel.replace(/\.md$/, "");
-    addPath(cleanPath);
   }
 
-  return tree;
+  // Sort: folders first, then docs, alphabetically
+  function sortNodes(nodes: TreeNode[]): TreeNode[] {
+    return nodes.sort((a, b) => {
+      const aFolder = a.children.length > 0 ? 0 : 1;
+      const bFolder = b.children.length > 0 ? 0 : 1;
+      if (aFolder !== bFolder) return aFolder - bFolder;
+      return a.title.localeCompare(b.title);
+    });
+  }
+
+  function sortAll(nodes: TreeNode[]): TreeNode[] {
+    const sorted = sortNodes(nodes);
+    for (const node of sorted) {
+      if (node.children.length > 0) sortAll(node.children);
+    }
+    return sorted;
+  }
+
+  return sortAll(tree);
 }
 
 function renderTree(nodes: TreeNode[], pathname: string) {
@@ -82,10 +98,10 @@ function renderTree(nodes: TreeNode[], pathname: string) {
             title={node.title}
           >
             <span>{node.isLeaf && node.children.length === 0 ? "📄" : "📁"}</span>
-            {node.title || node.name}
+            <span className="truncate">{node.title || node.name}</span>
           </Link>
           {node.children.length > 0 && (
-            <div className="ml-3 mt-0.5">
+            <div className="ml-5 border-l border-[#1f2022] pl-2 mt-0.5">
               {renderTree(node.children, pathname)}
             </div>
           )}
@@ -97,12 +113,15 @@ function renderTree(nodes: TreeNode[], pathname: string) {
 
 interface SectionTreeProps {
   section: string;
-  docPaths: string[];
+  docs: { slug: string; title: string }[];
   pathname: string;
 }
 
-function SectionTree({ section, docPaths, pathname }: SectionTreeProps) {
-  const tree = buildFolderTree(docPaths.filter((p) => p.startsWith(`${section}/`)), section);
+function SectionTree({ section, docs, pathname }: SectionTreeProps) {
+  const tree = buildFolderTree(
+    docs.filter((d) => d.slug.startsWith(`${section}/`)),
+    section,
+  );
   const sectionInfo = SECTIONS.find((s) => s.id === section);
   if (!sectionInfo) return null;
 
@@ -123,7 +142,6 @@ function SectionTree({ section, docPaths, pathname }: SectionTreeProps) {
 
 export default async function HomePage() {
   const all = await listDocuments();
-  const docPaths = all.map((d) => d.path);
 
   const recent = [...all]
     .sort(
@@ -194,7 +212,7 @@ export default async function HomePage() {
                 {/* Inline folder tree */}
                 <SectionTree
                   section={s.id}
-                  docPaths={docPaths}
+                  docs={all.map((d) => ({ slug: d.slug, title: d.title }))}
                   pathname="/"
                 />
               </div>