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fix: lazy-init Leaflet map so tiles actually load

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The map was being initialised on DOMContentLoaded even when its container
was display:none (0×0). Leaflet sets up internal bounds from container size
at init; on a zero-sized container no tiles are ever requested. Even
invalidateSize afterwards didn't recover reliably.

* map.js now only builds the Leaflet instance once the container has real
  dimensions (clientHeight >= 10). Triggered when the view toggle flips to
  Karte (rAF x2 + safety timers), and via restoreView on page load if the
  user's last choice was Karte.
* CSP img-src now includes https://unpkg.com for Leaflet marker icons.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Moritz 2026-04-21 12:14:54 +02:00
parent 42377f0b67
commit 4fd0b50a43
2 changed files with 37 additions and 33 deletions
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2
web/app.py
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@ -133,7 +133,7 @@ async def security_headers(request: Request, call_next):
"default-src 'self'; "
"script-src 'self' https://cdn.tailwindcss.com https://unpkg.com; "
"style-src 'self' https://cdn.tailwindcss.com https://unpkg.com 'unsafe-inline'; "
"img-src 'self' data: https://*.tile.openstreetmap.org https://tile.openstreetmap.org; "
"img-src 'self' data: https://*.tile.openstreetmap.org https://tile.openstreetmap.org https://unpkg.com; "
"connect-src 'self'; frame-ancestors 'none';"
)
return resp