1.4.0

What's Changed

• Replace Thymeleaf with jte for web templates by @hwesselmann in #30
• feat: phase 1 optimizations — jte templates, ObjectMapper, virtual threads, caching by @hwesselmann in #31
• feat: phase 2 architecture — controller decoupling, encoding centralisation, cache-evict meta-annotation by @hwesselmann in #32
• feat: phase 3 — harden BearerTokenFilter + fix SpotBugs findings by @hwesselmann in #33
• feat: phases 2-4 — architecture polish, security hardening, NullMarked by @hwesselmann in #34
• new ui design with updated logos, colors and design elements by @hwesselmann in #35

Full Changelog: v1.3.1...v1.4.0