chore(release): v1.28.17 — dashboard edits stick; share scope honoured

Dashboard layout changes take effect immediately: the save now evicts the
locale-keyed home-screen snapshot it previously missed, so a re-ordered or
toggled tile set no longer reverts to the prior selection for the SWR window.

A share link built with a narrowed report-section selection now serves exactly
that selection. The stored selection is the grouped export shape; the shared
view read it through the flat parser, which dropped every grouped toggle and
fell back to the full defaults — an over-share against the owner's choice. The
view now folds the grouped shape down faithfully. Documents-only shares were
never affected.

Hardening: the shared-document download path now sanitises the filename
identically to the owner download path, and thumbnail generation re-checks the
pixel ceiling after decode so a malformed image that slips past the header
sniff still cannot exhaust the worker.

docs/api/openapi.yaml

@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: HealthLog API
-  version: 1.28.16
+  version: 1.28.17
   description: >-
     Self-hosted personal-health-tracking PWA — public API surface for the iOS native client and external ingest.