fix: allow lowercase recording names

[marvinctl]

Type of change(s)

• Bug fix
• Feature / enhancement
• Infrastructure / tooling (CI, build, deps, tests)
• Documentation

What changed and why

• Replaced title-case input with plain text input in the rename dialog
• Allows recording names to keep lowercase words as entered

Tests performed

• ./gradlew :app:testFossDebugUnitTest detekt lint :app:assembleFossDebug --no-daemon
• POCO X2 running Android 15

Closes the following issue(s)

• Closes English-style Header Title Capitalization is enforced on EvErY WoRd wHiLe ReNaMinG #397

Checklist

• I read the contribution guidelines.
• I manually tested my changes on device/emulator (if applicable).
• I updated the "Unreleased" section in CHANGELOG.md (if applicable).
• I have self-reviewed my pull request (no typos, formatting errors, etc.).
• I understand every change in this pull request.

[naveensingh]

Test it on the POCO X2. It's connected to the core server.

[marvinctl]

Tested on the POCO X2 (Android 15). Lowercase words remain unchanged in the rename field, and the recording renames successfully.