Summary

• add a Compose dialog for configuring searchable fields, search scope, matching mode, and case sensitivity
• persist search options as JSON-backed application settings
• apply the options in strict and fuzzy entry matchers and in searchable/recycle-bin filtering
• expand the fake local database and add converter and fuzzy matcher tests
• update the Android/Gradle toolchain and supporting dependencies required by the branch

Motivation

Search behavior was previously limited to a single strict/fuzzy setting. This change gives users control over which entry fields and database scopes participate in search while keeping those choices across sessions.

Validation

• ./gradlew test
• ./gradlew app:compileFdroidDebugKotlin
• ./gradlew app:spotlessApply

Review note

SearchOptions.DEFAULT.restrictionScopes is currently empty, while the previous implementation always respected each group's searchable flag and the dialog model defaults the Searchable chip to enabled. Fresh or migrated settings may therefore include groups marked non-searchable until the user explicitly enables that chip. This should be resolved before marking the PR ready for review.