D6 — Paused goals render a top info banner ("This goal is paused" +
[Resume goal]) before the hero. Archived goals get the same treatment
with a Restore CTA when applicable.
D8 — No-target-date goals replace the empty projection chart with a
focused prompt card: calendar-plus icon, "Add a target date" heading,
short copy, and a "Set target date" CTA that opens the edit modal.
Stops wasting the right half of the hero on an unrenderable chart.
D9 — Reached / completed goals replace the projection chart with a
celebration card: party-popper green icon, "Goal reached. Nice work."
heading, target-hit confirmation copy, and an "Archive goal" CTA when
the state machine allows it.
The original projection chart still renders for behind / on_track goals
with a real target_date — that's the only case where it adds value.
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