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4a46a90a88
V2's funding widget ran (12 + 1) queries per linked account on the
goals#show render:
- one `last_30_inflow_for(account)` summed over a 30-day range,
- twelve separate `sparkline_for(account)` sums, one per 8-day
bucket inside a 90-day window.
For 3 linked accounts, that's 39 SQL queries from this component
alone before the projection chart's Balance::ChartSeriesBuilder
runs. Replace with two grouped queries that scan once across all
linked accounts:
- `last_30_inflow_map`: a `GROUP BY account_id` over the 30-day
window, returning a hash `{ account_id => clamped_inflow }`.
One query, no matter how many accounts are linked.
- `sparkline_map`: a `GROUP BY account_id,
LEAST(GREATEST((CURRENT_DATE - entries.date) / bucket_days, 0),
11)` over the 90-day window. One query covers every account ×
every bucket. Each per-account array is filled in oldest →
newest order so the SVG path reads left → right naturally.
Net query count for the funding widget drops from 13 × N to 2.
Both helpers fall through to safe defaults (`0`, all-zeros array)
on missing keys so the row loop stays branch-free.