fix(jellyfin): align session-store config contract

docs/subagents/agents/codex-jellyfin-ts-fix-20260222T071530Z-5e50.md

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+# codex-jellyfin-ts-fix-20260222T071530Z-5e50
+
+- alias: `codex-jellyfin-ts-fix`
+- mission: `Fix Jellyfin token/session type drift causing current TS build break in config + main runtime wiring`
+- status: `done`
+- branch: `main`
+- started_at: `2026-02-22T07:15:30Z`
+- heartbeat_minutes: `5`
+
+## Current Work (newest first)
+- [2026-02-22T07:23:47Z] progress: updated stale Jellyfin docs entry in `docs/configuration.md` to remove config `accessToken/userId` guidance and document stored session + env override keys.
+- [2026-02-22T07:18:07Z] test: green - `bun run tsc --noEmit`.
+- [2026-02-22T07:18:07Z] test: green - `bun test src/config/resolve/jellyfin.test.ts src/main/runtime/jellyfin-client-info-main-deps.test.ts src/main/runtime/jellyfin-cli-main-deps.test.ts src/main/runtime/jellyfin-setup-window-main-deps.test.ts`.
+- [2026-02-22T07:17:00Z] progress: aligned `src/main.ts` to Jellyfin session-store API names and removed legacy config auth fields.
+- [2026-02-22T07:16:58Z] test: red - added regression `jellyfin legacy auth keys are ignored by resolver` and confirmed failure before fix.
+- [2026-02-22T07:15:30Z] intent: scoped to existing backlog ticket `backlog/tasks/task-93 - Remove-Jellyfin-token-userId-from-config-use-env-and-stored-session.md`.
+
+## Files Touched
+- `src/config/definitions/defaults-integrations.ts`
+- `src/config/resolve/integrations.ts`
+- `src/config/resolve/jellyfin.test.ts`
+- `src/main.ts`
+- `docs/configuration.md`
+- `docs/subagents/agents/codex-jellyfin-ts-fix-20260222T071530Z-5e50.md`
+- `docs/subagents/INDEX.md`
+- `docs/subagents/collaboration.md`
+
+## Assumptions
+- compile break came from partial migration from token-in-config to stored-session model.
+- existing backlog task coverage is sufficient; no new task required for this narrow fix.
+
+## Open Questions / Blockers
+- none
+
+## Next Step
+- handoff complete.