feat: add mtu and mssfix options

[gsanchietti]

This pull request adds support for configuring OpenVPN MTU (tun_mtu) and MSSFIX (mssfix) settings through both backend and frontend, allowing users to customize these values via the UI and have them properly validated and persisted. The changes ensure these parameters are included in configuration files, validated in both backend and frontend, and exposed in the settings interface.

Backend configuration and validation:

• Added tun_mtu and mssfix fields to the backend configuration dictionaries and ensured they are written to config.env for OpenVPN settings. [1] [2]
• Updated backend input/output validation schemas to include tun_mtu and mssfix as integer fields with defaults and minimum values. [1] [2] [3]

Frontend UI and validation:

• Added input fields for tun_mtu and mssfix to the settings page, including tooltips, helper text, and error messages.
• Integrated tun_mtu and mssfix into the frontend data model, form validation, and configuration submission logic, including minimum value checks (576 for MTU, 0 for MSSFIX). [1] [2] [3] [4] [5] [6]

Screenshots

Added also a tooltip for Maxmind:

[Copilot]

Pull request overview

This PR adds support for configuring OpenVPN MTU (tun_mtu) and MSSFIX (mssfix) settings, enabling users to customize these network parameters through both the backend API and frontend UI. The changes ensure proper validation, persistence, and user interface integration for these OpenVPN network tuning parameters.

Key changes:

• Added tun_mtu and mssfix configuration fields with default values (1500 and 1450 respectively) across backend and frontend
• Implemented frontend validation requiring minimum values of 576 for MTU and 0 for MSSFIX
• Extended UI with input fields, tooltips, and helper text for the new parameters
• Bumped version to 2.2.0

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
ui/src/views/Settings.vue	Added input fields for tun_mtu and mssfix with validation logic, data model integration, and MaxMind tooltip
ui/public/i18n/en/translation.json	Added English translations for labels, helper text, and tooltips for the new MTU and MSSFIX fields
imageroot/actions/get-configuration/validate-output.json	Updated output schema example to include tun_mtu and mssfix fields
imageroot/actions/get-configuration/20read	Added default values for tun_mtu (1500) and mssfix (1450) in initial configuration
imageroot/actions/configure-module/validate-input.json	Added validation schema for tun_mtu and mssfix as integer fields with minimum 0 and defaults
imageroot/actions/configure-module/20configure	Implemented writing tun_mtu and mssfix values to config.env as OVPN_TUN_MTU and OVPN_MSSFIX
build-images.sh	Bumped controller version from 2.1.1 to 2.2.0

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[Copilot]

@gsanchietti I've opened a new pull request, #136, to work on those changes. Once the pull request is ready, I'll request review from you.

[Copilot]

@gsanchietti I've opened a new pull request, #137, to work on those changes. Once the pull request is ready, I'll request review from you.

[Copilot]

@gsanchietti I've opened a new pull request, #138, to work on those changes. Once the pull request is ready, I'll request review from you.

[Copilot]

@gsanchietti I've opened a new pull request, #139, to work on those changes. Once the pull request is ready, I'll request review from you.

[Copilot]

@gsanchietti I've opened a new pull request, #140, to work on those changes. Once the pull request is ready, I'll request review from you.

[Tbaile]

And here I thought that you disliked being pinged for PRs, github already emailed me 25 times for this PR 😬
Add me to reviewers when the bots adjust the code

[Tbaile]

Frontend checks look overkill, but go with it