📦🔧：update the vendored analytics script

[DerekNonGeneric]

The vendored copy was taken in 2024 and upstream has moved six times
since. This replaces it with what gc.zgo.at/count.js serves today.

Provenance, established rather than assumed

what we had	byte for byte upstream at 10d7e6e2 (2024-06-03)
what we ship now	byte for byte upstream at 478f026e (2026-04-07)
gc.zgo.at/count.js today	byte for byte upstream master

The old copy had no local edits, so this is a clean swap with
nothing of ours to preserve. Every one of the 34 changed lines maps to
a real upstream commit:

commit	date	what it does
6ebd8067	2025-05-23	clearer "append not found" warning
b41aa43a	2025-05-30	drops the window.goatcounter.vars shim
c8f63598	2025-06-04	drops the window.counter shim
6731d117	2025-06-21	removes the sizes table
d8d8b7a9	2026-03-04	checks navigator.sendBeacon exists
478f026e	2026-04-07	per-hit no_session

One of them is the reason to do this now

Upstream stopped collecting screen size beyond the width. Our copy did
not, so every visit has been sending screen height and device pixel
ratio to a server that removed the table they went in.

Measured on a phone viewport, building each version and reading what
goatcounter.url() produces:

previous (2024-06 copy):    s = "390,844,3"     width, height, pixel ratio
updated  (upstream master): s = "390"           width

Height and pixel ratio are a fingerprinting surface, and they were
being sent for nothing.

Second most useful: navigator.sendBeacon was called unguarded, so an
environment without it threw instead of falling back to the image
beacon.

Verified

• the published file is byte for byte upstream master
• the script loads with no page errors, and goatcounter.count is
  defined
• nps test passes

Size is near enough unchanged: 9,148 → 9,213 bytes, slightly larger.

Keeping it in sync

#1865 watches this file weekly and opens an issue when it drifts. Kept
separate because it is a mechanism rather than a version bump, and
because this diff should read as nothing but what upstream changed.

Refs #1548

Summary by CodeRabbit

• Bug Fixes
  • Improved analytics tracking reliability when browser features such as navigator or sendBeacon are unavailable.
  • Preserved existing tracking configuration during initialization.
  • Added support for excluding session data from tracking requests.
  • Updated visit-count warning messaging.

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[DerekNonGeneric]

@coderabbitai full review

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Full review finished.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 7c97b23f-4d32-4526-8ba1-20248eb0e554

📥 Commits

Reviewing files that changed from the base of the PR and between 1cddc7b and c47f6df.

📒 Files selected for processing (1)

• _assets/js/vendor/count.js

Included review availability: Your plan provides up to 10 included reviews per hour; 7 remain after this review.

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📝 Walkthrough

Walkthrough

The GoatCounter script now preserves the existing global object, exposes request helpers, adds no-session fields, reduces screen data, removes the legacy endpoint fallback, and handles missing beacon APIs before using image requests.

Changes

GoatCounter tracking

Layer / File(s)	Summary
Public tracking API and request data _assets/js/vendor/count.js	Initialization preserves window.goatcounter. get_data and filter are exposed publicly. Request data supports no_session and records screen width only.
Request and click tracking flow _assets/js/vendor/count.js	Endpoint resolution no longer uses window.counter. Beacon handling checks for unavailable browser APIs. Click requests include the element’s no-session setting. The visit-count warning text identifies the target as an element.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to c47f6

This localized vendor refresh removes unnecessary screen-height and pixel-ratio data and adds a safe beacon fallback without changing local application code; no actionable merge-blocking risk remains beyond normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: updating the vendored analytics script. It is concise and related to the pull request, although the emojis are unnecessary.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
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.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1 files.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/update-goatcounter

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