diff --git a/www/js/version.json b/www/js/version.json
index 9a591be..a0e0cc1 100644
--- a/www/js/version.json
+++ b/www/js/version.json
@@ -1,5 +1,5 @@
 {
-  "VERSION": "v0.7.38",
-  "VERSION_NUMBER": "0.7.38",
-  "BUILD_DATE": "2026-06-26T11:18:32.425Z"
+  "VERSION": "v0.7.39",
+  "VERSION_NUMBER": "0.7.39",
+  "BUILD_DATE": "2026-06-26T11:26:09.788Z"
 }
diff --git a/www/post-feed.html b/www/post-feed.html
index f1560f0..ba99bce 100644
--- a/www/post-feed.html
+++ b/www/post-feed.html
@@ -40,13 +40,19 @@
 
     #divBackBar,
     #divHint,
-    #divThread,
-    #divComposer {
+    #divThread {
       width: 80%;
       min-width: 300px;
       max-width: 700px;
     }
 
+    /* #divComposer lives INSIDE #divThread (already constrained to 700px),
+       so it must fill its parent (100%) rather than re-applying 80%
+       which would shrink it to 80% of 700 = 560px. */
+    #divComposer {
+      width: 100%;
+    }
+
     #divBackBar {
       display: flex;
       align-items: center;