v0.3.1: WebView compatibility and suggestion tap fixes

Bugfix release. Full details in CHANGELOG.md.

Fixed

• Stale suggestion highlight in WebView editors (Gmail, Chrome, Obsidian).
• Caret jumping to position 0 after expansion in Gmail-style composers.
• Text corruption in WebView editors (Discord, Chrome, Capacitor apps).
• Suggestion popup sometimes doing nothing when tapped.

Known limitations
See Compatibility and limitations — Obsidian, Google Docs and Chrome's address bar have caveats explained there.

APK checksum
sha256: e022d1d792669d55513ddf2e7566774c74a8d5cefd6ea0cdc9e3f3b587d4a1a9