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

[Alek99]

Summary

Three small docs-site bugs found while reviewing /docs/ai-builder/integrations/mcp-overview/, plus a dropdown cleanup.

• Transparent dropdown in dark mode. --c-slate-1 was missing from the dark-theme block in custom-colors.css (only an orphan comment marked the slot). Tailwind's bg-slate-1 resolves through --color-slate-1 → var(--c-slate-1), which fell back to transparent in dark mode. Affects every bg-slate-1 surface; most visible on the copy-page popover.
• Sidebar didn't sync on direct MCP navigation. Loading /docs/ai-builder/integrations/mcp-* directly fell through to sidebar_index = 0 (AI Builder), so the MCP category wasn't selected. Clicking MCP first worked because the click handler set _sidebar_index = 1. Added an /mcp- branch to SidebarState.sidebar_index.
• Copy-page button broken on Safari. The previous code did fetch(mdUrl).then(text => navigator.clipboard.writeText(text)). By the time writeText ran, Safari's user-gesture window had closed and the call was rejected. Chrome was lenient and allowed it. Switched to navigator.clipboard.write([new ClipboardItem({ 'text/plain': blobPromise })]) — calling write synchronously with a Promise-backed ClipboardItem preserves the gesture binding in both browsers.
• Removed llms-full.txt from the copy-page dropdown.

Test plan

• In dark mode, open the copy-page dropdown — background is solid (#151618).
• Hard-refresh on /docs/ai-builder/integrations/mcp-overview/ — sidebar shows MCP category selected and the MCP Integration accordion expanded.
• In Safari, click the copy-page button — page markdown lands in clipboard.
• In Chrome, click the copy-page button — same.
• Confirm the llms-full.txt row no longer appears in the dropdown.

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

Three focused docs-site bug fixes: adds the missing --c-slate-1 CSS variable in the dark-theme block (transparent dropdown background), adds an /mcp- branch to SidebarState.sidebar_index so direct navigation selects the correct sidebar, and rewrites the copy-page clipboard logic to use ClipboardItem with a Promise-backed blob to preserve Safari's user-gesture window. The llms-full.txt dropdown entry is also removed.

Confidence Score: 4/5

Safe to merge — all three fixes are targeted and correct, with only minor style-level concerns.

No P0 or P1 findings. Two P2s: the /mcp- substring match is slightly broad (easily tightened later), and the textarea fallback was silently removed from the writeText error path. Neither affects correctness for the targeted browsers.

No files require special attention; the sidebar state change and clipboard rewrite are both straightforward.

Important Files Changed

Filename	Overview
docs/app/assets/custom-colors.css	Replaces orphan /* #151618 */ comment with the missing --c-slate-1: #151618 CSS variable in the dark-theme block — correct fix.
docs/app/reflex_docs/templates/docpage/sidebar/state.py	Adds /mcp- route branch to sidebar_index computed var so direct navigation to MCP pages selects the correct sidebar; pattern is a broad substring match that could match unintended future routes.
docs/app/reflex_docs/templates/docpage/docpage.py	Rewrites clipboard logic to use ClipboardItem with a blob Promise (preserving gesture binding for Safari); removes llms-full.txt menu item; drops the textarea fallback from the writeText catch path.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[User clicks Copy button] --> B[animate icons]
    B --> C{ClipboardItem available?}
    C -- Yes --> D[Create blobPromise via fetch]
    D --> E[navigator.clipboard.write with ClipboardItem]
    E --> F{Success?}
    F -- No --> G[console.error]
    F -- Yes --> H[Text in clipboard]
    C -- No --> I[fetch mdUrl]
    I --> J{navigator.clipboard.writeText?}
    J -- Yes --> K[writeText text]
    J -- No --> L[textarea execCommand fallback]
    K --> H
    L --> H

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_{Reviews (1): Last reviewed commit: "fix(docs): dropdown bg in dark mode, MCP..." | Re-trigger Greptile}

[codspeed-hq]

Merging this PR will not alter performance

✅ 9 untouched benchmarks

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_{Comparing alek/docs-mcp-and-copy-fixes (5f2fbc9) with main (e6e3784)}

[picklelo]

nice working for me