chore: rebase fork onto upstream/main (7 commits)

[Deeds67]

Summary

• Rebases 16 fork commits onto latest upstream/main (7 new upstream commits)
• Resolves 1 conflict: check-pr-template.yml (modify/delete — kept our deletion)
• 0 commits behind upstream after rebase

Upstream changes inherited

• fix(web): make link fit album card (fix(web): make link fit album card immich-app/immich#26958)
• fix(web): prevent search page error on missing album filter (fix(web): prevent search page error on missing album filter immich-app/immich#26948)
• feat(mobile): open in browser (feat(mobile): open in browser immich-app/immich#26369)
• fix(mobile): use shared auth for background_downloader (fix(mobile): use shared auth for background_downloader immich-app/immich#26911)
• fix(mobile): duplicate server urls returned (fix(mobile): duplicate server urls returned immich-app/immich#26864)
• feat(web): improve OCR overlay text fitting, reactivity, and accessibility (feat(web): improve OCR overlay text fitting, reactivity, and accessibility immich-app/immich#26678)
• fix: ignore optional headers in pr template check (fix: ignore optional headers in pr template check immich-app/immich#26910)

Fork compatibility

All fork features verified intact: Shared Spaces, Storage Migration, Pet Detection, Image Editing, Branding, Google Photos Import.

Test plan

• CI passes on this branch
• Force-push to main after CI is green

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