feat: stabilize large comment trees

[christianjuth]

Comment tree overhaul

Replaces ad-hoc comment rendering with a proper tree data structure, tested and built bottom-up.

What's in here

• Comment tree builder — flat comment array → nested tree, with full test coverage
• Pruning — prevents layout shift as new pages load; new branches appear behind "load more" instead of inserting above already-read content
• Thread coloring — indent depth grounded by comment path, not render depth, so colors stay consistent when viewing a subtree
• Selected comment sorts to top — when navigating to a comment permalink, that comment floats to the top of its siblings
• Refactor & docs — renamed params for clarity (threadRootId, selectedCommentId), documented getCommentPageCursor behaviour, fixed internal typos

[github-actions]

Dependency Graph

One node per top-level folder in src/. Generated by dependency-cruiser.

[cloudflare-workers-and-pages]

Deploying blorp with    Cloudflare Pages

Latest commit:	bd82829
Status:	✅  Deploy successful!
Preview URL:	https://6f53fbad.blorp-6rm.pages.dev
Branch Preview URL:	https://stabalize-comment-tree.blorp-6rm.pages.dev

View logs

[github-actions]

Performance Comparison Report

• Current: HEAD (bd82829) - 2026-05-05 01:10:50Z
• Baseline: HEAD (b6a21c5) - 2026-05-05 01:10:28Z

Significant Changes To Duration

There are no entries

Meaningless Changes To Duration

Show entries

Name	Type	Duration	Count
PostCardView extra-small/text	render	12.7 ms → 12.8 ms (+0.2 ms, +1.3%)	2 → 2
PostCardView large/article	render	21.7 ms → 21.9 ms (+0.1 ms, +0.7%)	2 → 2
PostCardView large/image	render	21.5 ms → 21.4 ms (-0.1 ms, ±0.0%)	2 → 2
PostCardView large/text	render	22.8 ms → 22.6 ms (-0.2 ms, -0.9%)	2 → 2
PostCardView small/image	render	18.4 ms → 18.5 ms (+0.1 ms, +0.6%)	2 → 2
PostCardView small/text	render	17.6 ms → 17.5 ms (-0.1 ms, ±0.0%)	2 → 2

Show details

Name	Type	Duration	Count
PostCardView extra-small/text	render	Baseline Mean: 12.7 ms Stdev: 0.1 ms (1.1%) Runs: 12.6 12.7 12.7 12.6 12.6 12.6 12.8 13.0 12.6 12.5 13.0 12.6 12.9 12.6 12.5 12.7 12.6 12.6 12.7 12.6 Warmup runs: 13.5 Removed outliers: (none) Current Mean: 12.8 ms Stdev: 0.5 ms (3.8%) Runs: 12.8 12.7 12.7 12.8 12.7 12.8 13.0 13.5 13.3 12.9 12.7 14.6 12.8 12.4 12.5 12.6 12.5 12.5 12.6 12.5 Warmup runs: 13.1 Removed outliers: (none)	Baseline Mean: 2 Stdev: 0 (0.0%) Runs: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Render issues: - Initial updates: 1 Current Mean: 2 Stdev: 0 (0.0%) Runs: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Render issues: - Initial updates: 1
PostCardView large/article	render	Baseline Mean: 21.7 ms Stdev: 0.2 ms (1.0%) Runs: 21.9 21.7 21.5 21.7 21.9 21.9 21.8 21.7 21.6 22.3 21.6 21.5 21.4 21.4 21.7 21.5 21.9 21.8 21.8 21.5 Warmup runs: 22.6 Removed outliers: (none) Current Mean: 21.9 ms Stdev: 0.3 ms (1.4%) Runs: 22.4 22.3 22.1 21.7 22.2 22.1 21.6 21.4 22.3 22.1 21.9 21.6 21.7 21.4 21.5 21.6 22.0 21.9 21.6 21.7 Warmup runs: 22.8 Removed outliers: (none)	Baseline Mean: 2 Stdev: 0 (0.0%) Runs: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Render issues: - Initial updates: 1 Current Mean: 2 Stdev: 0 (0.0%) Runs: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Render issues: - Initial updates: 1
PostCardView large/image	render	Baseline Mean: 21.5 ms Stdev: 0.3 ms (1.6%) Runs: 21.9 21.9 21.7 22.5 21.2 21.3 21.8 21.5 21.6 21.6 21.4 21.3 21.4 21.3 21.8 21.2 21.1 21.3 21.4 21.2 Warmup runs: 22.2 Removed outliers: (none) Current Mean: 21.4 ms Stdev: 0.3 ms (1.2%) Runs: 21.4 21.4 21.5 21.7 21.4 21.2 21.0 21.4 21.2 21.6 21.3 21.4 21.2 21.0 21.1 21.8 22.0 21.4 21.7 21.5 Warmup runs: 22.4 Removed outliers: (none)	Baseline Mean: 2 Stdev: 0 (0.0%) Runs: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Render issues: - Initial updates: 1 Current Mean: 2 Stdev: 0 (0.0%) Runs: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Render issues: - Initial updates: 1
PostCardView large/text	render	Baseline Mean: 22.8 ms Stdev: 1.3 ms (5.8%) Runs: 25.3 24.3 23.4 22.9 22.5 22.5 26.2 23.9 23.6 22.0 22.7 21.7 21.7 21.3 22.0 21.3 21.4 22.7 22.3 22.0 Warmup runs: 85.0 Removed outliers: (none) Current Mean: 22.6 ms Stdev: 1.2 ms (5.1%) Runs: 25.6 24.6 23.4 23.3 22.7 22.4 22.4 24.1 23.2 22.6 22.6 22.2 21.8 21.7 21.4 21.4 21.5 21.8 21.7 21.2 Warmup runs: 88.3 Removed outliers: (none)	Baseline Mean: 2 Stdev: 0 (0.0%) Runs: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Render issues: - Initial updates: 1 Current Mean: 2 Stdev: 0 (0.0%) Runs: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Render issues: - Initial updates: 1
PostCardView small/image	render	Baseline Mean: 18.4 ms Stdev: 0.2 ms (1.0%) Runs: 18.6 18.4 18.6 18.4 18.3 18.3 18.1 18.1 18.4 18.5 18.3 18.2 18.2 18.9 18.5 18.4 18.3 18.2 18.4 18.3 Warmup runs: 18.5 Removed outliers: (none) Current Mean: 18.5 ms Stdev: 0.2 ms (1.3%) Runs: 18.4 18.6 18.2 18.1 18.3 18.4 18.2 18.6 18.5 18.8 19.0 18.4 18.4 18.6 19.0 18.6 18.4 18.4 18.5 18.3 Warmup runs: 18.5 Removed outliers: (none)	Baseline Mean: 2 Stdev: 0 (0.0%) Runs: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Render issues: - Initial updates: 1 Current Mean: 2 Stdev: 0 (0.0%) Runs: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Render issues: - Initial updates: 1
PostCardView small/text	render	Baseline Mean: 17.6 ms Stdev: 0.2 ms (1.0%) Runs: 17.5 17.6 17.6 17.8 17.4 17.7 17.8 18.0 17.6 17.8 17.6 17.6 17.6 17.5 17.4 18.0 17.6 17.6 Warmup runs: 18.1 Removed outliers: 24.0 21.1 Current Mean: 17.5 ms Stdev: 0.2 ms (1.3%) Runs: 17.7 18.1 17.4 17.7 17.8 17.4 17.3 17.6 17.5 17.3 17.4 17.3 17.4 17.8 18.0 17.7 17.4 17.4 17.4 17.4 Warmup runs: 18.0 Removed outliers: (none)	Baseline Mean: 2 Stdev: 0 (0.0%) Runs: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Render issues: - Initial updates: 1 Current Mean: 2 Stdev: 0 (0.0%) Runs: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Render issues: - Initial updates: 1

Render Count Changes

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Render Issues

Name	Initial Updates	Redundant Updates
PostCardView large/text	1 🔴	-
PostCardView large/image	1 🔴	-
PostCardView large/article	1 🔴	-
PostCardView small/text	1 🔴	-
PostCardView small/image	1 🔴	-
PostCardView extra-small/text	1 🔴	-

Added Entries

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Removed Entries

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