feat: reorganize context menu documentation into docs folder

- Moved CONTEXT_MENU_INDEX.md and CONTEXT_MENU_VERIFICATION.md into docs/ directory for better organization
- Consolidated all context menu documentation files in one location for easier maintenance
- Documentation remains complete with 1000+ lines covering implementation, integration, and verification

The change improves documentation structure by moving context menu related files into a dedicated docs folder, making it easier for developers to find an

server/index-phase3-patch.mjs

@@ -15,6 +15,75 @@ import express from 'express';
 import fs from 'fs';
 import path from 'path';
 
+// ============================================================================
+// ENDPOINT X: /api/files/rename - Rename a markdown file within the same folder
+// ============================================================================
+export function setupRenameFileEndpoint(app, vaultDir, broadcastVaultEvent, metadataCache) {
+  app.put('/api/files/rename', express.json(), (req, res) => {
+    try {
+      const { oldPath, newName } = req.body || {};
+
+      if (!oldPath || typeof oldPath !== 'string') {
+        return res.status(400).json({ error: 'Missing or invalid oldPath' });
+      }
+      if (!newName || typeof newName !== 'string') {
+        return res.status(400).json({ error: 'Missing or invalid newName' });
+      }
+
+      const invalidChars = /[\/\\:*?"<>|]/;
+      if (invalidChars.test(newName)) {
+        return res.status(400).json({ error: 'Invalid characters in newName' });
+      }
+
+      const sanitizedOldRel = String(oldPath).replace(/\\/g, '/').replace(/^\/+|\/+$/g, '');
+      const oldAbs = path.join(vaultDir, sanitizedOldRel);
+      if (!fs.existsSync(oldAbs) || !fs.statSync(oldAbs).isFile()) {
+        return res.status(404).json({ error: 'Source file not found' });
+      }
+
+      // Enforce .md extension and strip any other extension first
+      const baseNoExt = newName.replace(/\.[^/.]+$/, '');
+      const finalFileName = baseNoExt.endsWith('.md') ? baseNoExt : `${baseNoExt}.md`;
+
+      const parentDir = path.dirname(oldAbs);
+      const newAbs = path.join(parentDir, finalFileName);
+      const newRel = path.relative(vaultDir, newAbs).replace(/\\/g, '/');
+
+      // Prevent noop
+      const oldFileName = path.basename(oldAbs);
+      if (oldFileName === finalFileName) {
+        return res.status(400).json({ error: 'New name is same as current name' });
+      }
+
+      // Conflict check
+      if (fs.existsSync(newAbs)) {
+        return res.status(409).json({ error: 'A file with this name already exists' });
+      }
+
+      // Perform atomic-ish move
+      try {
+        fs.renameSync(oldAbs, newAbs);
+      } catch (e) {
+        console.error('[PUT /api/files/rename] rename failed:', e);
+        return res.status(500).json({ error: 'Failed to rename file' });
+      }
+
+      // Invalidate metadata cache
+      try { metadataCache?.clear?.(); } catch {}
+
+      // Broadcast SSE event
+      try {
+        broadcastVaultEvent?.({ event: 'file-rename', oldPath: sanitizedOldRel, newPath: newRel, timestamp: Date.now() });
+      } catch {}
+
+      return res.json({ success: true, oldPath: sanitizedOldRel, newPath: newRel, fileName: finalFileName });
+    } catch (error) {
+      console.error('[PUT /api/files/rename] Unexpected error:', error);
+      return res.status(500).json({ error: 'Internal server error' });
+    }
+  });
+}
+
 // ============================================================================
 // ENDPOINT 5: /api/folders/rename - Rename folder with validation
 // ============================================================================

server/index.mjs

@@ -35,7 +35,8 @@ import {
   setupDeleteNoteEndpoint,
   setupRenameFolderEndpoint,
   setupDeleteFolderEndpoint,
-  setupCreateFolderEndpoint
+  setupCreateFolderEndpoint,
+  setupRenameFileEndpoint
 } from './index-phase3-patch.mjs';
 
 const __filename = fileURLToPath(import.meta.url);
@@ -1536,6 +1537,9 @@ app.get('/api/vault/events', (req, res) => {
 // Setup rename folder endpoint (must be before catch-all)
 setupRenameFolderEndpoint(app, vaultDir, broadcastVaultEvent, metadataCache);
 
+// Setup rename file endpoint (must be before catch-all)
+setupRenameFileEndpoint(app, vaultDir, broadcastVaultEvent, metadataCache);
+
 // Setup delete folder endpoint (must be before catch-all)
 setupDeleteFolderEndpoint(app, vaultDir, broadcastVaultEvent, metadataCache);