feat(code): file picker on quill autocomplete

[adamleithp]

Summary

• Migrate FilePicker (Cmd+P jump-to-file) from cmdk + Radix Popover to quill Autocomplete* inside Dialog — same shape as the command palette in feat(code): cmd palette on quill autocomplete + bump quill #2100.
• Drop FilePicker.css (cmdk-specific selectors); quill primitives ship the styling.
• Keep fzf as the source of truth: items={sections} + filter={null} so base-ui doesn't re-filter on top of fzf's fuzzy ranking.
• Empty query now shows Recent + Other files groups (deduped) instead of recents-only — typing collapses to a single unlabeled group of fzf results.
• Conditional pt-1 on the list when the first section is unlabeled (quill zeroes list padding-top after AutocompleteStatus).

Stacked on #2100 (ux/cmd-menu). Merge that first.

Test plan

• Open any task → Cmd+P opens the picker centered at top.
• Empty query with no recents shows the full file list.
• Open a file → reopen Cmd+P → "Recent" group shows just-opened file, "Other files" group lists the rest (no duplicates).
• Typing fuzzy-matches name + path; "Recent"/"Other files" labels disappear during search.
• ↑/↓ moves highlight, Enter opens the file in the split editor, Esc closes in one press.
• Reopening the picker after closing resets the query.
• pnpm --filter code typecheck clean.

[greptile-apps]

Prompt To Fix All With AI

Fix the following 1 code review issue. Work through them one at a time, proposing concise fixes.

---

### Issue 1 of 1
apps/code/src/renderer/features/command/components/FilePicker.tsx:91-96
The `className="block"` override on `AutocompleteItem` diverges from the sibling `CommandMenu` usage and may cancel out the default flex layout that quill's `AutocompleteItem` applies. With `display: block`, the `FileIcon` SVG, the filename text node, and the directory `<span>` will be rendered as inline content rather than flex-aligned siblings, which can produce misaligned or run-together text. `CommandMenu` omits this class and achieves correct icon + label alignment. Consider removing it, or wrapping children in a `<div className="flex items-center gap-2">` if an explicit flex row is needed.

```suggestion
              <AutocompleteItem
                key={file.path}
                value={file.path}
                onClick={() => handleSelect(file.path)}
              >
```

_{Reviews (1): Last reviewed commit: "feat(code): file picker on quill autocom..." | Re-trigger Greptile}

[greptile-apps]

Prompt To Fix All With AI

Fix the following 1 code review issue. Work through them one at a time, proposing concise fixes.

---

### Issue 1 of 1
apps/code/src/renderer/features/command/components/FilePicker.tsx:104
When `sections[0]?.label` is truthy the template literal resolves to `"max-h-[60vh] "` (trailing space). While harmless in practice, a simple ternary keeps intent clearer and avoids the superfluous whitespace.

```suggestion
            className={sections[0]?.label ? "max-h-[60vh]" : "max-h-[60vh] pt-1"}
```

_{Reviews (2): Last reviewed commit: "feat(code): file picker recent + other f..." | Re-trigger Greptile}

[greptile-apps]

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