## Context
Actual Budget v26.4.0 (released 2026-04-05) re-introduces the Sankey
chart report for income/expense flow visualization (PR #7220). An earlier
experimental implementation was deleted in March 2024 (PR #2417) but a
proper reimplementation with "Other" grouping, date-range selection, and
percentage toggle is now shipped behind the experimental feature flag.
Viktor wanted Sankey visualization of budget cash flow; this is the lowest-
cost path since his existing Actual Budget deployment already holds all the
transaction data.
## This change
Bumps the `tag` input on all three factory module calls (viktor, anca, emo)
from `26.3.0` to `26.4.0`. No breaking changes, schema migrations, or config
changes per the 26.4.0 release notes.
## Rollout
Applied via `scripts/tg apply --non-interactive`. All three pods rolled
successfully to `actualbudget/actual-server:26.4.0` and passed readiness
probes. The http-api sidecars (`jhonderson/actual-http-api`) were untouched.
## Post-upgrade
Users need to toggle Settings → Experimental features → Sankey report to
access the chart, then Reports → new Sankey widget.
Closes: code-oof
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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