Eddy 0.6.22 beta

Fixes from a full bug audit of the app:

• Security: file uploads can no longer hand a page Eddy's own private files, the password manager closes every open sheet and export when it relocks, and HTTPS-only now covers public IP addresses.
• Privacy: incognito site settings are forgotten when the last private tab closes, private browsing leaves nothing in the app log, downloads no longer leak full page addresses, Clear site data removes more cookies, and clearing the cache also removes tab previews.
• Downloads: resuming is more reliable and never splices two versions of a file, binary data downloads stay intact, and failed or abandoned downloads clean up after themselves.
• Fixes for the PDF viewer, view source, bookmark import, password import, find in page, dictation, Back in bookmark folders and the reduced-motion setting.
• App text now lives in Android string resources, ready for translation.

Validation: 49 unit tests and all 38 on-device tests pass on an Android 15 emulator, and Android lint reports no errors. The security fixes are covered by tests but were not checked against a real attack on a device.

Downloads:

• eddy-0.6.22-beta.apk: standard build with developer tools.
• eddy-0.6.22-beta-fdroid.apk: build without the bundled developer-tools asset, for F-Droid reproducibility checks.