Remove OpenCode 'O' logo mark from sidebar menu

[shuv1337]

Problem/Context

During the merge of upstream v1.0.221 (commit 8a1d5ab4f), the OpenCode logo mark ("O" icon) was re-introduced into the sidebar menu. This is visible at the top of the sidebar when it's collapsed or expanded.

The merge commit message explicitly noted: "adopted upstream's Mark logo link and TooltipKeybind component" — the TooltipKeybind was intentional, but the Mark logo should not have been kept since this is a fork with different branding.

Current State

The Mark component (an SVG rendering the letter "O") appears in the sidebar:

File: packages/app/src/pages/layout.tsx:916-918

<A href="/" class="shrink-0 h-8 flex items-center justify-start px-2" data-tauri-drag-region>
  <Mark class="shrink-0" />
</A>

The Mark component itself is defined in packages/ui/src/components/logo.tsx:1-14 and renders the OpenCode "O" branding.

Acceptance Criteria

• Remove the OpenCode "O" Mark from the sidebar menu in packages/app/src/pages/layout.tsx
• Either remove the entire link+logo block, or replace with shuvcode branding if needed
• Ensure the sidebar toggle button remains functional and properly positioned
• Verify the change on both mobile and desktop viewport sizes
• Update the sync conflict documentation if this becomes a recurring merge issue

Implementation Details

Suggested Approach

Remove lines 915-918 from packages/app/src/pages/layout.tsx:

const SidebarContent = (sidebarProps: { mobile?: boolean }) => {
  const expanded = () => sidebarProps.mobile || layout.sidebar.opened()
  return (
    <>
      <div class="flex flex-col items-start self-stretch gap-4 p-2 min-h-0 overflow-hidden">
-       <Show when={!sidebarProps.mobile}>
-         <A href="/" class="shrink-0 h-8 flex items-center justify-start px-2" data-tauri-drag-region>
-           <Mark class="shrink-0" />
-         </A>
-       </Show>
        <Show when={!sidebarProps.mobile}>
          <TooltipKeybind
            ...

Also clean up the unused import on line 20:

- import { Mark } from "@opencode-ai/ui/logo"

Related Files

• packages/app/src/pages/layout.tsx - Main layout with sidebar
• packages/ui/src/components/logo.tsx - Logo components (Mark, AsciiMark, AsciiLogo)
• packages/app/src/components/header.tsx - Header uses AsciiLogo/AsciiMark (these are fine, they're branded for shuvcode)

Previous Removal

This was previously removed in commit 185614d29 ("updates"), but got re-added during upstream merge. Consider adding to script/sync/fork-features.json to track this as a fork-specific change that should be preserved during merges.

Tasks

• Remove Mark logo link from sidebar in layout.tsx
• Remove unused Mark import
• Test sidebar appearance on desktop (collapsed and expanded states)
• Test sidebar appearance on mobile
• Consider documenting in fork-features.json for future merge conflict prevention

[shuv1337]

Closed: OpenCode logo mark removed from sidebar menu in packages/app/src/pages/layout.tsx. Change documented in script/sync/fork-features.json to prevent regression.