fix(docs): dropdown bg in dark mode, MCP sidebar sync, Safari copy (#6402)

- Add missing --c-slate-1 dark-mode definition in custom-colors.css; bg-slate-1
  resolves through this var, which was undefined in dark mode and caused the
  copy-page popover (and any other bg-slate-1 surface) to render transparent.
- In SidebarState.sidebar_index, route MCP doc paths to index 1 so the MCP
  category is selected when landing directly on /docs/ai-builder/integrations/mcp-*.
- Fix copy-page button on Safari: rewrite to use navigator.clipboard.write with
  a ClipboardItem whose data is a Promise. Calling clipboard.write synchronously
  inside the click handler preserves Safari's user-gesture requirement; the
  prior fetch().then(writeText) chain only worked in Chromium.
- Remove the llms-full.txt entry from the copy-page dropdown.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Alek99

docs/app/assets/custom-colors.css

@@ -108,7 +108,7 @@
   --slate-10: #737c8a;
   --slate-11: #adb4bf;
   --slate-12: #eceef1;
-  /* #151618 */
+  --c-slate-1: #151618;
   --c-slate-2: #1a1b1d;
   /* #1A1B1D */
   --c-slate-3: #222326;

docs/app/reflex_docs/templates/docpage/docpage.py

@@ -453,20 +453,21 @@ def _copy_page_button(doc_content: str, path: str = "") -> rx.Component:
     });
   };
   animate();
+  if (navigator.clipboard && typeof ClipboardItem !== 'undefined' && navigator.clipboard.write) {
+    const blobPromise = fetch(mdUrl).then((r) => {
+      if (!r.ok) throw new Error(r.status);
+      return r.text().then((t) => new Blob([t], { type: 'text/plain' }));
+    });
+    navigator.clipboard
+      .write([new ClipboardItem({ 'text/plain': blobPromise })])
+      .catch((err) => console.error('Copy page failed:', err));
+    return;
+  }
   fetch(mdUrl)
     .then((r) => (r.ok ? r.text() : Promise.reject(r.status)))
     .then((text) => {
       if (navigator.clipboard && navigator.clipboard.writeText) {
-        return navigator.clipboard.writeText(text).catch(() => {
-          const ta = document.createElement('textarea');
-          ta.value = text;
-          ta.style.position = 'fixed';
-          ta.style.opacity = '0';
-          document.body.appendChild(ta);
-          ta.select();
-          try { document.execCommand('copy'); } catch (e) {}
-          document.body.removeChild(ta);
-        });
+        return navigator.clipboard.writeText(text);
       }
       const ta = document.createElement('textarea');
       ta.value = text;
@@ -523,12 +524,6 @@ def _copy_page_button(doc_content: str, path: str = "") -> rx.Component:
                                 description="Copy page as Markdown for LLMs",
                                 on_click=copy_action,
                             ),
-                            _copy_page_menu_item(
-                                icon=ui.icon("File01Icon", size=16),
-                                title="llms-full.txt",
-                                description="View all docs as Markdown for LLMs",
-                                href="/docs/llms-full.txt",
-                            ),
                             rx.el.div(class_name="h-px bg-slate-4 my-1 mx-2"),
                             _copy_page_menu_item(
                                 icon=ui.icon("MessageProgrammingIcon", size=16),

docs/app/reflex_docs/templates/docpage/sidebar/state.py

@@ -57,6 +57,8 @@ def sidebar_index(self) -> int:
                 return 2
             elif "enterprise" in route:
                 return 3
+            elif "/mcp-" in route:
+                return 1
             else:
                 return 0
         if "hosting" in route: