feat(ui): enhance model select modal UX and modal traffic lights (#1111)

* feat(model-select-modal): highlight added models and support bulk selection

- Add addedModelValues prop to highlight already-added models with primary color
- Sort models alphabetically per provider, with added models floated to top
- Replace green highlight with primary brand color (orange #E56A4A)
- Use check icon (10px) inline with model name instead of check_circle
- Replace Done button with info bar explaining click-to-toggle behavior
- Add ProviderIcon to provider group headers replacing colored dot
- Import ProviderIcon, remove unused Button import

* feat(cli-tools): wire addedModelValues, onDeselect, and auto-save to model select modals

- Pass selectedModels as addedModelValues to ModelSelectModal in OpenCode and Copilot cards
- Add onDeselect handler to remove model from list on second click
- Set closeOnSelect=false to allow bulk model selection
- Remove manual setModalOpen(false) from onSelect callbacks
- Add saveModels() silent auto-save triggered on modal close (OpenCodeToolCard)
- Use useRef to track latest selectedModels in closure-safe way

* feat(modal): functional traffic light close button with hover icon and tooltip

- Make red dot a clickable button that closes the modal
- Show ✕ icon inside red dot on hover via group-hover opacity transition
- Gray out yellow and green dots (cursor-not-allowed, no tooltip)
- Increase dot size from w-3 h-3 to w-4 h-4
- Add Tooltip with brand-matched color #FF5F56 on red dot
- Remove X close button from modal header

* feat(tooltip): add color prop for themed tooltip backgrounds

* feat(i18n): add translations for model select info bar and close tooltip

- Add 'Click to add, click again to remove. Changes are saved automatically.' to all 32 locales
- Add 'Close' translation to all 32 locales

* fix(ui): address code review feedback on modal UX and auto-save

- Modal: remove showCloseButton prop, use showTrafficLights for header
  condition, hide traffic lights on mobile (hidden md:flex), add mobile
  X button (md:hidden) with aria-label, add aria-label and title on
  traffic light close button
- OpenCodeToolCard: validate activeModel membership before saving —
  fallback to models[0] or empty string; clear/reassign activeModel
  on deselect when removed model was the active one
- CopilotToolCard: add useRef + selectedModelsRef, add saveModels()
  using /api/cli-tools/copilot-settings, wire auto-save on modal close
- ModelSelectModal: fix JSX formatting — separate info bar closing div
  from Search comment onto its own line

public/i18n/literals/nl.json

@@ -12,7 +12,7 @@
   "Logout": "Afmelden",
   "Login": "Aanmelden",
   "Providers": "Providers",
-  "Usage": "Gebruik",
+  "Usage": "Statistieken",
   "API Key": "API-sleutel",
   "Connected": "Verbonden",
   "Disconnected": "Verbroken",
@@ -91,9 +91,7 @@
   "Dark": "Donker",
   "Auto": "Automatisch",
   "Endpoint": "Eindpunt",
-  "Providers": "Providers",
   "Combos": "Combinaties",
-  "Usage": "Statistieken",
   "Quota Tracker": "Quotabijhouder",
   "MITM": "MITM",
   "CLI Tools": "CLI-tools",
@@ -150,7 +148,6 @@
   "No Proxy": "Geen proxy",
   "Comma-separated hostnames/domains to bypass the proxy.": "Door komma's gescheiden hostnamen/domeinen om de proxy te omzeilen.",
   "Test proxy URL": "Proxy-URL testen",
-  "Apply": "Toepassen",
   "Proxy settings applied": "Proxy-instellingen toegepast",
   "Proxy enabled": "Proxy ingeschakeld",
   "Proxy disabled": "Proxy uitgeschakeld",
@@ -178,7 +175,6 @@
   "Use Antigravity IDE & GitHub Copilot → with ANY provider/model from 9Router": "Gebruik Antigravity IDE en GitHub Copilot → met ELKE provider/model van 9Router",
   "How it works:": "Hoe het werkt:",
   "Antigravity/Copilot IDE request → DNS redirect to localhost:443 → MITM proxy intercepts → 9Router → response to Antigravity/Copilot": "Antigravity/Copilot IDE-aanvraag → DNS-omleiding naar localhost:443 → MITM-proxy onderschept → 9Router → antwoord naar Antigravity/Copilot",
-  "API Key": "API-sleutel",
   "No API keys — create one in Keys page": "Geen API-sleutels — maak er één aan op de pagina Sleutels",
   "sk_9router (default)": "sk_9router (standaard)",
   "Server started": "Server gestart",
@@ -192,5 +188,5 @@
   "Sudo Password Required": "Sudo-wachtwoord vereist",
   "Enter your sudo password to start/stop MITM server": "Voer uw sudo-wachtwoord in om de MITM-server te starten/stoppen",
   "Sudo Password": "Sudo-wachtwoord",
-  "Confirm": "Bevestigen"
+  "Click to add, click again to remove. Changes are saved automatically.": "Klik om toe te voegen, klik opnieuw om te verwijderen. Wijzigingen worden automatisch opgeslagen."
 }