SubMiner/backlog/tasks/task-219 - Restore-streamed-video-progress-in-anime-episodes.md

id, title, status, assignee, created_date, updated_date, labels, priority, dependencies, references

id	title	status	assignee	created_date	updated_date	labels	priority	dependencies	references
TASK-219	Restore streamed video progress in anime episodes	In Progress	codex	2026-03-22 21:25	2026-03-22 21:25	stats immersion-tracker youtube	medium		/Users/sudacode/projects/japanese/SubMiner/src/core/services/immersion-tracker/query.ts /Users/sudacode/projects/japanese/SubMiner/src/core/services/immersion-tracker-service.ts /Users/sudacode/projects/japanese/SubMiner/src/core/services/immersion-tracker/__tests__/query.test.ts /Users/sudacode/projects/japanese/SubMiner/src/core/services/immersion-tracker-service.test.ts

Description

Episode progress for streamed media can stay at 0% because some remote sessions persist ended_media_ms = 0 even when subtitle timing and watch activity clearly advanced, and the anime episode query currently treats 0 as a valid progress checkpoint.

Acceptance Criteria

• #1 Anime episode progress ignores zero-valued session checkpoints and falls back to subtitle/event timing
• #2 New streamed sessions persist meaningful progress even when playback-position updates are missing or sparse
• #3 Regression tests cover the zero-checkpoint remote-session case