FreqTrace v0.3.0

Signed with an Apple Development certificate (not notarized). Opens cleanly on Macs that trust this developer; generally blocked on others.
On an unrecognized Mac, first launch: right-click FreqTrace.app > Open > Open.

What's Changed

• Design-review polish: Light-mode fix, meter panels, empty-state signature by @vk0eppel in #31
• Add anomaly-candidate validation corpus spec (#20) by @vk0eppel in #32
• Add anomaly-candidate criteria spec (#21) by @vk0eppel in #33
• Synthetic anomaly corpus + scoring harness + baseline (#34) by @vk0eppel in #39
• Prototype the four-state anomaly criteria + pin the intents (#36) by @vk0eppel in #40
• Pin the loose intents without a room — synthetic Step 1 (#37 partial) by @vk0eppel in #41
• Real-signal research + HCMS validation + retune (#37) by @vk0eppel in #42
• Ship the validated four-state anomaly detector (#38) by @vk0eppel in #43
• Docs + version bump for v0.3.0 by @vk0eppel in #44

New Contributors

• @vk0eppel made their first contribution in #31

Full Changelog: v0.2.3...v0.3.0