Skip user activity tracking in local dev

[elemdos]

Problem

Opening the editor in local dev (primo dev) floods the console with repeating errors:

GET /api/collections/pages/records/<id> 404 (Not Found)
Invalid user_activities record {...} ZodError: path: ["id"], expected string

user_activities is a collaborator-presence feature — it tracks "who else is editing this site" and getUserActivity explicitly filters out your own activity to show only other users. In local dev there are no other users, so it has nothing to show. Worse, listing it resolves activity rows whose page points at since-deleted pages → a 404 per stale row → the related-record resolver gets a null id → ZodError, looping over the list.

This was previously masked by an unrelated render crash (fixed in #1179 / v3.2.1); with that gone, the editor proceeds far enough to surface this noise.

Fix

Gate both ends on the existing instance.dev_mode flag (same signal already used by Deploy.svelte):

• setUserActivity returns early in dev — don't write presence churn to the local DB.
• getUserActivity returns [] in dev — don't list/resolve activities (the part that throws).

This is a design fix, not a defensive patch: the feature simply shouldn't run in single-user local dev.

Verification

Built a local server binary embedding this change and ran it via PRIMO_BINARY against a real local workspace:

• Before: ~30+ console errors, dozens of repeating user_activities ZodErrors.
• After: the user_activities flood is gone; editor renders and works normally.

(One unrelated benign 404 for a single deleted-page reference remains — a separate dangling-reference issue, out of scope here.)

Production build (vite build) passes. The only svelte-check findings in the file are pre-existing Timeout-vs-number type nits unrelated to this change.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Improved local/development behavior by disabling collaborator activity tracking and activity lists in single-user development mode.
  • Prevented unnecessary background updates in dev, reducing noise and avoiding errors from stale activity data.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: b1808f80-9c8e-4281-a644-92ae4f365a54

📥 Commits

Reviewing files that changed from the base of the PR and between a3e356d and acdf69c.

📒 Files selected for processing (1)

• src/lib/UserActivity.svelte.ts

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📝 Walkthrough

Walkthrough

UserActivity.svelte.ts now checks instance.dev_mode before recording or listing user activity. In dev mode, activity writes stop early and activity reads return an empty list. getUserActivity also now declares UserActivityInfo[][] explicitly.

Changes

Dev-mode user activity gating

Layer / File(s)	Summary
Activity guards and return type src/lib/UserActivity.svelte.ts	Imports instance, skips setUserActivity in dev mode, and makes getUserActivity return [] in dev mode with an explicit UserActivityInfo[][] type.

🎯 1 (Trivial) | ⏱️ ~2 minutes

I hop जहां the dev mode glows,
No busy paws on user flows.
In quiet mode I nibble hay,
And empty lists just wink away.
🐇✨

🚥 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 and concisely describes the main change: disabling user activity tracking in local development.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

✨ 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 fix/skip-user-activity-in-dev

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