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Renders a dedicated tile for users on a GLP-1 receptor agonist
(Mounjaro, Ozempic, Wegovy, Zepbound, …) — the new W4d schema enum
`Medication.treatmentClass = GLP1` is the discriminator. Tile self-
hides when no active GLP-1 med exists so accounts without one see no
visual change.
The tile surfaces:
- Drug name + current dose ("Mounjaro 7.5mg") — sourced from the
`MedicationDoseChange` titration history (latest row wins), so a
Mounjaro user titrating up 2.5 → 5 → 7.5 → 10 mg sees their
current step, not the starting dose.
- Last injection date + weekday ("Sun, 05/10")
- Next injection date + weekday + countdown
("Sun, 05/17 (in 3 days)") — predicted from the existing schedule
cadence
- Weight delta since starting the therapy ("−4.2 kg since start"
/ "−4,2 kg seit Beginn") — green chip on loss, orange on gain,
muted minus on flat (within ±0.1 kg)
- A compact weight chart with vertical injection-day markers via
the new `<HealthChart verticalMarkers={…} />` prop
New server endpoint `GET /api/dashboard/glp1` aggregates the data:
the heavy lifting (current dose / last + next injection / titration
history / inventory math) is delegated to the existing
`buildGlp1SnapshotBlock` so the Coach's GLP-1-aware reply path and
the dashboard tile read from the same shape. The route adds the UI-
facing extras (weight series since first dose-change, current vs
start, injection date keys for the markers) on top.
Mount: dashboard mother page (`src/app/page.tsx`) mounts the tile
below the AI insights preview and above the chart row — high enough
that a Mounjaro user sees their dose-response without scrolling past
BP / pulse, but below the AI preview which stays the scroll-stop
hero anchor.
Constraint respected (Marc directive 2026-05-14): the chart lives on
the Dashboard tile and the Insights /medikamente sub-page only; the
Medications page itself stays chart-free.
i18n keys: dashboard.glp1.{title, lastInjection, nextInjection,
weightDelta, inDays, empty.title, empty.description} in EN + DE.
Tests pin 7 scenarios: hidden when no active GLP-1, hidden when meds
array is empty, skeleton during fetch, full render for a Mounjaro 7.5
mg weekly profile, latest titration step wins (10 mg, not 2.5 mg),
fallback to name-only when no dose history exists, German copy under
the de locale.