Add custom recordings directory management and UI integration

[Aravinth-Earth]

Before Submitting This PR

Please confirm you have done the following:

• I have searched existing issues and pull requests (including closed ones) to ensure this isn't a duplicate
• I have read CONTRIBUTING.md

If this is a feature or change that was previously closed/rejected:

• I have explained in the description below why this should be reconsidered
• I have gathered community feedback (link to discussion below)

Human Written Description

As we save voice inputs as recordings, insted of default app data folder, i prefer to save them in a folder where i can easily moniter/mange, as it's of a PII info my machine collectes / stores

Related Issues/Discussions

• Feature request: option to specify recordings folder #133 (comment)

Changes gist #

• Implement set_recordings_directory command to manage custom recordings path.
• Introduce RecordingsDirectory component for user interface to select and manage the recordings directory.
• Update HistoryManager to resolve recordings directory from settings dynamically.
• Modify settings structure to include recordings_custom_dir.
• Enhance error handling and user feedback for directory operations.

Discussion & Community Feedback

Nothign Yet

Testing

Tested belwo scenariso & found no issues

1. Settings → Advanced → History — new "Recordings Folder" row appears
2. Toggle ON → pick a custom folder → Record something, check the custom folder has the .wav
3. Toggle ON with move_existing → old recordings migrate, toast shows count
4. Toggle OFF → confirmation dialog appears, cancel does nothing
5. Toggle OFF → confirm → recordings move back to default, toast
6. History page → Open Recordings Folder → opens custom folder
7. Restart app with custom folder set → still uses custom folder

Screenshots/Videos (if applicable)

1. New Setting Option Added

2. When Custom Folder selected - that path shown in UI & recordings auto moved to new path

3. When Disabling custom path, a user confirmation is asked

4. On succesful revert of recordings path, all recording auto moved to default folder

AI Assistance

• No AI was used in this PR
• AI was used (please describe below)

If AI was used:

• Tools used: Codex & Claude Code
• How extensively: All the implementaiton, Build Generation, Seconday Testing