android/v0.5.0

• Add OpenPGP end-to-end encryption with key management, Autocrypt discovery, and encrypted composing
• Redesign tasks and calendar views, card-style mail list, and edge-to-edge navigation bar layout
• Tidy the composer with expandable Cc/Bcc toggle, compact recipient chips, and attachment cards
• Draw kanban boards edge-to-edge under the navigation bar with normal-weight titles

What's Changed

• desktop: slide the board's conversation pane by transform, fix #145 by @CR0CKER in #146
• desktop: give dark themes light themes' depth, with shadows instead of hairlines, fix #152 by @CR0CKER in #153
• desktop: keep the signature out of the quick reply, switchable in both composers, fix #149 by @CR0CKER in #154

Full Changelog: android/v0.4.9...android/v0.5.0