[refactor / language] add missing keys, minor thai update

[MichaelWheeley]

What does this PR do?

lang sort keys, add missing, minor update th

Type of change

• Bug fix
• New feature
• Performance improvement
• Refactor / code cleanup
• Documentation
• Translation
• Map layer plugin

How to test

Checklist

• App loads without console errors
• Tested in Dark, Light, and Retro themes
• Responsive at different screen sizes (desktop + mobile)
• If touching server.js: caches have TTLs and size caps (we serve 2,000+ concurrent users)
• If adding an API route: includes caching and error handling
• If adding a panel: wired into Modern, Classic, and Dockable layouts
• No hardcoded colors — uses CSS variables (var(--accent-cyan), etc.)
• No .bak, .old, console.log debug lines, or test scripts included

Screenshots (if visual change)

[accius]

Thanks for the key sorting and missing key additions Michael — the Thai translation looks good too. Found two issues that would silently regress existing translations:

1. Duplicate keys overwrite existing translations — ca, de, es, fr

These four languages already have translated values for pttDisabled and unauthorized. The PR adds English fallbacks for those same keys later in the file, creating duplicates. Most JSON parsers take the last value, so the existing translations get silently replaced with English.

Example from ca.json:

"app.rigControl.error.pttDisabled": "El PTT està desactivat al rig-bridge — ...",   // existing Catalan ✓
"app.rigControl.error.unauthorized": "Error d'autenticació — ...",                    // existing Catalan ✓
"app.rigControl.error.notReachable": "Rig Bridge is not running — ...",               // NEW — correct ✓
"app.rigControl.error.pttDisabled": "PTT is disabled on rig-bridge — ...",            // DUPLICATE — overwrites Catalan ✗
"app.rigControl.error.unauthorized": "Unauthorized — check API token in ...",         // DUPLICATE — overwrites Catalan ✗

Same in de.json, es.json, fr.json. Fix: remove the duplicate pttDisabled and unauthorized lines from these four files — only notReachable needs to be added.

2. Duplicate skimmers key in ka.json (Georgian)

The file already has "plugins.layers.rbn.skimmers": "სკიმერები" and the PR adds a second "plugins.layers.rbn.skimmers": "Skimmers" which would overwrite the Georgian translation. Remove the English duplicate.

[MichaelWheeley]

updated