From 2aa29d1ec4c83ee740540b946b25aeab256e6b8f Mon Sep 17 00:00:00 2001
From: ZDDC <caseywitt@proton.me>
Date: Sat, 9 May 2026 22:34:11 -0500
Subject: [PATCH] fix(mdedit): root file tree at <project>/working/ even with
 no trailing slash
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mdedit's loadServerDirectory derived its file-tree root by stripping
back to the last "/" in window.location.href. For a no-trailing-slash
canonical URL (<project>/working) that gave the wrong root: the parent
project directory rather than working/ itself. Visible symptom on
zddc-server's auto-served URLs after the recent dispatcher changes —
mdedit at /Project/working would show the project's archive, working,
staging, etc. all together instead of being sandboxed to working/.

Detect the directory-shaped URL by checking whether the last path
segment contains "." (file marker). No dot = directory; treat the
whole path as the root and append the trailing slash internally.

  /Project/working          → root /Project/working/  (was /Project/)
  /Project/working/x/y/     → root /Project/working/x/y/ (unchanged)
  /Project/x/mdedit.html    → root /Project/x/  (file URL; unchanged)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---
 mdedit/js/file-system.js | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/mdedit/js/file-system.js b/mdedit/js/file-system.js
index 810cb2c..f805e0f 100644
--- a/mdedit/js/file-system.js
+++ b/mdedit/js/file-system.js
@@ -683,9 +683,38 @@ async function readServerDirectory(dirUrl, parentNode, depth) {
 async function loadServerDirectory() {
     if (!(location.protocol === 'http:' || location.protocol === 'https:')) return;
 
+    // Compute the directory URL the file tree should be rooted at.
+    //
+    //   <project>/working/         → root = <project>/working/
+    //   <project>/working/x/y/     → root = <project>/working/x/y/
+    //   <project>/working          → root = <project>/working/    (no-slash
+    //                                 canonical-folder URL — the dispatcher
+    //                                 routes mdedit here directly without
+    //                                 a redirect, so we infer "directory"
+    //                                 from the absence of a `.` in the
+    //                                 last segment rather than stripping
+    //                                 back to the parent.)
+    //   <project>/x/y/mdedit.html  → root = <project>/x/y/        (the leaf
+    //                                 segment IS a file; strip to parent.)
+    //
+    // The rule: if the last path segment contains a "." it's a file,
+    // strip it; otherwise treat the whole path as the directory.
     let href = window.location.href.split('?')[0].split('#')[0];
-    const lastSlash = href.lastIndexOf('/');
-    const baseUrl = (lastSlash >= 0) ? href.substring(0, lastSlash + 1) : href + '/';
+    let baseUrl;
+    if (href.endsWith('/')) {
+        baseUrl = href;
+    } else {
+        const lastSlash = href.lastIndexOf('/');
+        const lastSeg = lastSlash >= 0 ? href.substring(lastSlash + 1) : href;
+        if (lastSeg.indexOf('.') !== -1) {
+            // Looks like a file (has an extension) — strip to parent.
+            baseUrl = lastSlash >= 0 ? href.substring(0, lastSlash + 1) : href + '/';
+        } else {
+            // Looks like a directory — append the trailing slash so all
+            // subsequent listing URLs are computed correctly.
+            baseUrl = href + '/';
+        }
+    }
 
     // Only enter server-source mode if the host actually serves JSON directory
     // listings (zddc-server / Caddy). On a plain static host the probe fails