Accessibility: Login form missing aria-label and empty h1 tag

📑 I have found these related issues/pull requests

The login form (src/components/Login.vue) has a few accessibility issues:

1. Empty <h1> tag — The <h1 class="h3 mb-3 fw-normal" /> is self-closing with no content. Screen readers announce an empty heading, which is confusing for visually impaired users.

2. Form missing aria-label — The <form> element has no accessible name, so screen readers don't announce what the form is for.

3. No timeout on login submission — If the WebSocket connection drops during login, the submit button stays disabled (processing = true) indefinitely with no error feedback to the user.

🛡️ Security Policy

• I have read and agree to Uptime Kuma's Security Policy.

📝 Description

No response

👟 Reproduction steps

1. Open Uptime Kuma login page
2. Enable a screen reader (VoiceOver on macOS or NVDA on Windows)
3. Navigate through the page — notice the empty heading is announced as blank
4. The form is not announced as "Login form" or similar
5. For the timeout issue: start login, then disconnect network — button stays disabled forever

👀 Expected behavior

1. Screen reader should announce a meaningful heading (e.g., "Login" or app name)
2. Form should be announced as a login form
3. If login fails due to connection loss, user should see an error message and button should re-enable after ~10 seconds

😓 Actual Behavior

1. Screen reader announces empty heading
2. Form has no accessible name
3. Button stays disabled indefinitely on connection loss with no feedback

🐻 Uptime-Kuma Version

2.4.0

💻 Operating System and Arch

macOS 15 (Apple Silicon)

🌐 Browser

Google Chrome 137 (Official Build) (arm64)

🖥️ Deployment Environment

• Runtime Environment:
  • Docker: Version X.X.X (Build Y.Y.Y)
  • Docker Compose: Version X.X.X
  • Portainer (BE/CE): Version X.X.X (LTS: Yes/No)
  • MariaDB: Version X.X.X (LTS: Yes/No)
  • Node.js: Version X.X.X (LTS: Yes/No)
  • Kubernetes (K3S/K8S): Version X.X.X (LTS: Yes/No, via [method/tool])
• Database:
  • SQLite: Embedded
  • MariaDB: Embedded/External
• Database Storage:
  • Filesystem:
    • Linux: ext4/XFS/Btrfs/ZFS/F2FS
    • macOS: APFS/ HFS+
    • Windows: NTFS/ReFS
  • Storage Medium: HDD/eMMC/SSD/NVMe
• Uptime Kuma Setup:
  • Number of monitors: X

📝 Relevant log output