v0.5.4-beta1

New brand identity — fresh app icon + menu bar mark. Pure visual refresh, no functional changes from v0.5.3-beta2.

• New app icon: two soft purple + coral leaves meeting on cream — warmer, more SoDulce, less “institutional”
• New menu bar mark: a bold interlocked S-twist that holds up at 18×18
• No functional changes — same recording, transcription, summary, and auto-update flow as v0.5.3-beta2

The previous mark was reading as institutional / hospital-style. New design language: warm dusty purple + coral peach, soft paper-fold shapes, “two perspectives meeting” as the conceptual story. Locked alongside the privacy positioning shift earlier today.