feat: package code file tree should keep active file in view

[btea]

🔗 Linked issue

Scroll the active file in the files list into view when it's clicked/page loaded

🧭 Context

📚 Description

When switching files in the code file tree area, the selected file will automatically jump to the center of the area.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
npmx.dev	Ready	Preview, Comment	Jul 7, 2026 2:35am

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs.npmx.dev	Ignored	Preview	Jul 7, 2026 2:35am
npmx-lunaria	Ignored		Jul 7, 2026 2:35am

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
app/components/Code/FileTree.vue	83.33%	0 Missing and 1 partial ⚠️

📢 Thoughts on this report? Let us know!

[coderabbitai]

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📝 Walkthrough

Walkthrough

Adds a treeRoot ref to the file tree, queries the active node via aria-current="true", and scrolls it into view after currentPath changes and ancestor expansion completes.

Changes

File tree current-node scrolling

Layer / File(s)	Summary
Root ref, scroll helper, and watcher app/components/Code/FileTree.vue	Creates a treeRoot template ref, binds it to the root <ul>, and adds watcher logic that expands ancestors then scrolls the active node into view.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description is on-topic and describes the same file-tree auto-scroll behaviour.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly describes the main change: keeping the active file in the code file tree in view.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 1

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: fb857c39-22d7-4d7d-bdb1-c3dad6a02d27

📥 Commits

Reviewing files that changed from the base of the PR and between 0d952fa and 30a4dce.

📒 Files selected for processing (1)

• app/components/Code/FileTree.vue

[coderabbitai]

🧹 Nitpick comments (1)

app/components/Code/FileTree.vue (1)

40-45: Consider using generic querySelector for type safety.

The type assertion as HTMLElement works but could be tightened. Using the generic form avoids a cast and aligns with the coding guideline for strictly type-safe code.

Suggested improvement

 const scrollIntoView = () => {
-  const el = treeRoot.value?.querySelector('[aria-current="true"]') as HTMLElement
+  const el = treeRoot.value?.querySelector<HTMLElement>('[aria-current="true"]')
   if (el) {
     el.scrollIntoView({ block: 'center' })
   }
 }

As per coding guidelines: "Ensure you write strictly type-safe code, for example by ensuring you always check when accessing an array value by index."

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 52934022-cdcd-4f8b-b5df-3d63f0824666

📥 Commits

Reviewing files that changed from the base of the PR and between 30a4dce and ab14372.

📒 Files selected for processing (1)

• app/components/Code/FileTree.vue

[ghostdevv]

There is an interesting bug where if you load the page on a small screen when it scrolls the scroll isn't contained to the file tree

[btea]

I tested it with the preview link, and when I clicked the icon in the lower right corner to expand the side tree structure, it correctly retrieved the node and scrolled the node into the view area.

[ghostdevv]

I can't reproduce the scroll issue I had a couple weeks back, so LGTM!

[coderabbitai]

♻️ Duplicate comments (1)

app/components/Code/FileTree.vue (1)

45-50: ⚠️ Potential issue | 🟠 Major

Run the path watcher only from the root tree instance.

At Line 45, this watcher still executes in every recursive CodeFileTree instance. That can queue repeated nextTick(scrollIntoView) calls (Line 50) and redundant autoExpandAncestors work on each path change.

Proposed fix

 watch(
   () => props.currentPath,
   path => {
-    if (path) {
+    if (path && depth.value === 0) {
       autoExpandAncestors(path)
       nextTick(scrollIntoView)
     }
   },
   { immediate: true },
 )

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 95746bab-bc3a-40d5-ae1f-f6c1e2a49c9e

📥 Commits

Reviewing files that changed from the base of the PR and between 57eec3e and 0a0d6da.

📒 Files selected for processing (1)

• app/components/Code/FileTree.vue

[ghostdevv]

ah wait, it seems to still scroll even when the thing is already visible 🤔

[btea]

In this case, the smooth effect should probably be removed.

[ghostdevv]

In this case, the smooth effect should probably be removed.

The smooth made it much more obvious but it happens without it 🫠

[btea]

That's true. But I think the silky smooth scrolling effect looks good right now. 😄

[ghostdevv]

Blocked by #2288 for now, as the solution for that will help make this work 🙏

[btea]

@ghostdevv Can this PR be restarted?