remove: drop LINE Notify integration

[xNewz]

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📋 Overview

• Removed LINE Notify provider code (backend + frontend)

👉 LINE integration is still available through the LINE provider (based on the LINE Messaging API). Please migrate to LINE Messenger if you need to continue receiving alerts via LINE.

The UI component you should continue using is src/components/notifications/Line.vue.

• What problem does this pull request address?
  • LINE Notify (https://notify-bot.line.me/) has officially ended its service.
    The integration inside Uptime Kuma is no longer functional. Keeping this option
    confuses users, creates dead code, and increases maintenance burden.
• What features or functionality does this pull request introduce or enhance?
  • Removes LINE Notify notification provider completely
    • Deleted provider implementation under server/notification-providers/
    • Removed registration in server/notification.js
    • Cleaned up frontend files (NotificationDialog.vue, related UI)

• Relates to #issue-number
• Resolves #issue-number

🛠️ Type of change

• 🐛 Bugfix (a non-breaking change that resolves an issue)
• ✨ New feature (a non-breaking change that adds new functionality)
• ⚠️ Breaking change (a fix or feature that alters existing functionality in a way that could cause issues)
• 🎨 User Interface (UI) updates
• 📄 New Documentation (addition of new documentation)
• 📄 Documentation Update (modification of existing documentation)
• 📄 Documentation Update Required (the change requires updates to related documentation)
• 🔧 Other (please specify):
  • Provide additional details here.

📄 Checklist

• 🔍 My code adheres to the style guidelines of this project.
• 🦿 I have indicated where (if any) I used an LLM for the contributions
• ✅ I ran ESLint and other code linters for modified files.
• 🛠️ I have reviewed and tested my code.
• 📝 I have commented my code, especially in hard-to-understand areas (e.g., using JSDoc for methods).
• ⚠️ My changes generate no new warnings.
• 🤖 My code needed automated testing. I have added them (this is an optional task).
• 📄 Documentation updates are included (if applicable).
• 🔒 I have considered potential security impacts and mitigated risks.
• 🧰 Dependency updates are listed and explained.
• 📚 I have read and understood the Pull Request guidelines.

📷 Screenshots or Visual Changes

• UI Modifications: Highlight any changes made to the user interface.
• Before & After: Include screenshots or comparisons (if applicable).

Event	Before	After
UP
DOWN
Certificate-expiry
Testing

[CommanderStorm]

Instead of removing, I would like to see Line being migrated as discussed in

• #5982

Basically, the changes from said PR plus dediding how to name it.

[xNewz]

LINE Messaging API already being implemented in Line.vue

[CommanderStorm]

Good point.

Are api keys for this different? Could we mirate users over?
In general, what happens if I have line notify confiugred and have not looked at it since may.
Will merging this crash-loop those users or what will happen to them 🤔

[xNewz]

LINE Notify has already been officially discontinued as of March 31, 2025 the service and APIs can no longer be used at all. Because of that, existing LINE Notify configurations are already non-functional regardless of whether this PR is merged.

LINE itself recommends migrating to the LINE Messaging API, which is already implemented in Line.vue. The API keys and setup are different, so users can’t be automatically migrated over. They will need to reconfigure using the Messaging API in order to restore notification functionality.

Merging this PR won’t crash-loop users. it just removes the dead Notify integration that no longer works.

[CommanderStorm]

I think we still need to do a migration, even if this were to not crash loop users.

The options are to remove this option from the database and montiror or some other option that I have not thought about