diff --git a/fusion_plating/fusion_plating/__manifest__.py b/fusion_plating/fusion_plating/__manifest__.py
index d5bf86a6..47f58352 100644
--- a/fusion_plating/fusion_plating/__manifest__.py
+++ b/fusion_plating/fusion_plating/__manifest__.py
@@ -5,7 +5,7 @@
 
 {
     'name': 'Fusion Plating',
-    'version': '19.0.5.0.0',
+    'version': '19.0.5.1.0',
     'category': 'Manufacturing/Plating',
     'summary': 'Core plating / metal finishing ERP: facilities, processes, tanks, baths, jobs, operators.',
     'description': """
@@ -102,6 +102,7 @@ Copyright (c) 2026 Nexa Systems Inc. All rights reserved.
         'web.assets_backend': [
             'fusion_plating/static/src/scss/fusion_plating.scss',
             'fusion_plating/static/src/scss/recipe_tree_editor.scss',
+            'fusion_plating/static/src/scss/fp_chatter_dark.scss',
             'fusion_plating/static/src/xml/recipe_tree_editor.xml',
             'fusion_plating/static/src/js/recipe_tree_editor.js',
         ],
diff --git a/fusion_plating/fusion_plating/static/src/scss/fp_chatter_dark.scss b/fusion_plating/fusion_plating/static/src/scss/fp_chatter_dark.scss
new file mode 100644
index 00000000..d972bdae
--- /dev/null
+++ b/fusion_plating/fusion_plating/static/src/scss/fp_chatter_dark.scss
@@ -0,0 +1,48 @@
+// =====================================================================
+// Fusion Plating — Chatter dark-mode patch
+//
+// In dark mode the floating message-action toolbar (reaction / reply /
+// star / link icons) renders white-on-white because Odoo sets the
+// hover icon color to `white` but doesn't give the toolbar itself a
+// dark background. Result: icons invisible, users can't see what
+// they're hovering.
+//
+// Branch at compile time (Odoo 19 compiles every SCSS file into the
+// `web.assets_backend` bundle with $o-webclient-color-scheme: bright,
+// AND into `web.assets_web_dark` with $o-webclient-color-scheme: dark).
+// Light bundle gets nothing (zero output); dark bundle gets the patch.
+// =====================================================================
+
+$o-webclient-color-scheme: bright !default;
+
+@if $o-webclient-color-scheme == dark {
+    .o-mail-Message-actions {
+        // Solid dark background so light/white icons stand out
+        background-color: var(--o-component-bgcolor, #2b2f33) !important;
+        border: 1px solid rgba(255, 255, 255, 0.10);
+        border-radius: 6px;
+        padding: 2px 4px;
+        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
+
+        // Make sure every icon (reaction, reply, star, link, more) has
+        // enough contrast against the dark popup. Defaults sit at 35%
+        // opacity which barely shows.
+        button, .btn, .o-mail-ActionList-button {
+            color: rgba(255, 255, 255, 0.78) !important;
+
+            > i, > .oi, > .fa {
+                color: rgba(255, 255, 255, 0.82) !important;
+                opacity: 1 !important;
+            }
+
+            &:hover, &:focus, &:focus-visible, &.show {
+                background-color: rgba(255, 255, 255, 0.10) !important;
+                color: #fff !important;
+
+                > i, > .oi, > .fa {
+                    color: #fff !important;
+                }
+            }
+        }
+    }
+}
diff --git a/fusion_plating/scripts/fp_dark_bundle_check.py b/fusion_plating/scripts/fp_dark_bundle_check.py
new file mode 100644
index 00000000..d625aa92
--- /dev/null
+++ b/fusion_plating/scripts/fp_dark_bundle_check.py
@@ -0,0 +1,31 @@
+env = env  # noqa
+# Force generation of both bundles
+for bundle_name in ('web.assets_backend', 'web.assets_web_dark'):
+    bundle = env['ir.qweb']._get_asset_bundle(bundle_name)
+    css = bundle.css()  # this materializes the attachment
+    print(f'{bundle_name}: triggered, css() type={type(css).__name__}')
+
+env.cr.commit()
+
+# Now find them
+attachs = env['ir.attachment'].sudo().search(
+    [('url', 'like', '/web/assets/%')],
+    order='id desc',
+)
+print(f'\\n{len(attachs)} asset attachments after force-compile:')
+for a in attachs:
+    raw_size = len(a.raw or b'')
+    print(f'  [{a.id}] {a.name} ({raw_size} bytes)')
+
+# Check the dark one for our marker
+dark = attachs.filtered(lambda a: 'web.assets_web_dark' in (a.name or ''))
+if dark:
+    text = (dark[0].raw or b'').decode('utf-8', errors='ignore')
+    print(f'\\ndark bundle markers:')
+    print(f'  o-mail-Message-actions: {text.count("o-mail-Message-actions")} occurrences')
+    print(f'  #2b2f33 marker        : {text.count("#2b2f33")} occurrences')
+    print(f'  rgba(255, 255, 255, 0.10) marker: {text.count("rgba(255, 255, 255, 0.10)")} occurrences')
+    if '#2b2f33' in text:
+        idx = text.find('#2b2f33')
+        print(f'\\ncontext around our color:')
+        print(text[max(0, idx-300):idx+300])