v3.4

What's Changed

• fix(reader): use numberSort for offline next-book order by @everpcpc in #458
• fix(reader): persist offline progress metadata by @everpcpc in #459
• fix(reader): tighten progress timeout and retry flow by @everpcpc in #460
• feat(reader): add offline PDF reader flow by @everpcpc in #462
• feat(reader): add animated image overlay playback by @everpcpc in #463
• fix(reader): use loadFileURL for animated image webview by @everpcpc in #464
• refactor: clean up redundant patterns and reduce duplication by @everpcpc in #465
• feat: add widgets, quick actions, and Spotlight indexing by @everpcpc in #466
• chore: incr build ver to 276 by @everpcpc in #467
• feat: refine Spotlight indexing controls by @everpcpc in #469
• feat(widget): polish cards and add series widget by @everpcpc in #470
• fix(reader): enforce hard timeout for progress sync requests by @everpcpc in #471
• feat: add layered icon composer assets by @everpcpc in #472
• docs: regenerate full-featured product copy by @everpcpc in #473
• chore: update changelog by @everpcpc in #474
• chore: bump version to 3.5 by @everpcpc in #475

Full Changelog: v3.3...v3.4