Two changes around tech "departure point" coords (used for route
optimization when the tech has no live GPS yet):
1. New default fallback = 1867 chemin de la Rivière, Sainte-Clotilde
(Gigafibre HQ, lng=-73.6756, lat=45.1599). Was downtown Montréal,
which never made sense — every tech started the day with a 70 km
imaginary commute.
2. Per-tech editable home base via a 📍 button on each row of the
tech sidebar. Clicking it opens a dialog that accepts either:
• a free-text address — geocoded via OpenStreetMap Nominatim
(browser-side, sane User-Agent, no hub proxy needed)
• or a literal "lat, lng" pair pasted directly
On confirm: PUT to ERPNext (Dispatch Technician.latitude /
.longitude), patch the local store row, and trigger a route
recompute since the start point changed.
The geocode hits Nominatim public — fine for a low-volume
internal tool. If we ever exceed their fair-use limits, swap to
the existing /address-search hub route which already has the
AQ + RQA pipeline.
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