[jung-thomas]

Summary

Two regressions from the initial track-grouping fix (#2933), both reported on the live PROD display:

1. Per-track bars counted distinct users, not completions. computePathBuckets deduped by (user, track), so 5 completions by one attendee read as 1. → now counts every TUTORIAL completion in a track (no user dedup).
2. Hero "total activity" counter collapsed. It summed bucket counts; once buckets became track-scoped, the hero dropped from all window completions (~62) to only track-member completions (3), and double-counted tutorials shared across tracks. → computePathBuckets now returns { buckets, totalCompletions }; totalCompletions = all window TUTORIAL completions, track-independent.

Changes

• srv/lib/event-path-buckets.js — count completions (not users); return { buckets, totalCompletions }.
• srv/event-stream-service.{js,cds} — expose totalCompletions; declare new completionTick event.
• srv/display-service.{js,cds} — unpack .buckets (admin array contract unchanged); declare completionTick.
• srv/developer-service.js — socket now fires completionTick once per active event for every completion (drives hero), plus tutorialCompleted per matching track (drives bars).
• app/display-app/src/event-stream.ts — totalCount seeded from totalCompletions (falls back to bucket sum for old servers), bumped by completionTick; no longer summed from buckets.

Deferred (data issue, not display)

Checkpoints: probe of event 10000002 shows 0 window checkpoint completions and all 7 checkpoint path items have null taskLegacyId (no join key) — counting them would be inert. The two prize-only Joule tracks reading 0 is dead-slot path data (11 null-legacyId tutorial items in the mission), tracked separately.

Verification

• 45 unit tests pass (new: completions-not-users, totalCompletions incl. no-track + no-window cases).
• PROD probe event 10000002: totalCompletions=62, ABAP=3 (was 2 under user-dedup), Joule Studio=1.

Test plan

• Deploy to DEV, load display-app on event 10000002 — hero shows total activity (~62), track bars show completion counts, live completions bump both correctly

[jung-thomas]

Added a third fix (commit 3b2ab68): resolve track path items by tutorial_ID FK, not just taskLegacyId.

The reporter flagged that tracks they'd completed ("Joule Studio with N8N", "Keynote Demo") still showed 0. Root cause: buildTrackMap matched completions to tracks using only CompletionPathItems.taskLegacyId, but manually-authored event content (#1866) sets the item's tutorial_ID FK and leaves taskLegacyId NULL — the normal shape for the TechEd/DSAG event missions. Those FK-only items fell through, so whole tracks with real tutorials and real activity counted 0.

Now FK-first (mirrors path-item-task-resolver.buildTaskMap): direct TUTORIAL items and GROUP children resolve tutorial_ID → Tutorials.legacyId, then the map is keyed by legacyId. CHECKPOINT/PETOBERFEST unchanged.

PROD probe event 10000002 after fix: "Joule Studio with N8N"=1, "Joule Studio Keynote Demo"=1 (both now appear), "Joule Studio"=1, "ABAP"=3, totalCompletions=66. New unit test covers an FK-only path item.