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/cs.json

@@ -12,7 +12,7 @@
   "Logout": "Odhlásit se",
   "Login": "Přihlásit se",
   "Providers": "Poskytovatelé",
-  "Usage": "Použití",
+  "Usage": "Statistika",
   "API Key": "Klíč API",
   "Connected": "Připojeno",
   "Disconnected": "Odpojeno",
@@ -91,9 +91,7 @@
   "Dark": "Tmavý",
   "Auto": "Automaticky",
   "Endpoint": "Koncový bod",
-  "Providers": "Poskytovatelé",
   "Combos": "Kombinace",
-  "Usage": "Statistika",
   "Quota Tracker": "Sledování kvót",
   "MITM": "MITM",
   "CLI Tools": "Nástroje CLI",
@@ -150,7 +148,6 @@
   "No Proxy": "Bez proxy",
   "Comma-separated hostnames/domains to bypass the proxy.": "Čárkou oddělené názvy hostitelů/domény pro obejití proxy.",
   "Test proxy URL": "Testovat URL proxy",
-  "Apply": "Aplikovat",
   "Proxy settings applied": "Nastavení proxy aplikováno",
   "Proxy enabled": "Proxy povolena",
   "Proxy disabled": "Proxy zakázána",
@@ -178,7 +175,6 @@
   "Use Antigravity IDE & GitHub Copilot → with ANY provider/model from 9Router": "Použijte Antigravity IDE a GitHub Copilot → s JAKÝMKOLIV poskytovatelem/modelem z 9Router",
   "How it works:": "Jak to funguje:",
   "Antigravity/Copilot IDE request → DNS redirect to localhost:443 → MITM proxy intercepts → 9Router → response to Antigravity/Copilot": "Požadavek Antigravity/Copilot IDE → Přesměrování DNS na localhost:443 → Proxy MITM zachycuje → 9Router → odpověď na Antigravity/Copilot",
-  "API Key": "Klíč API",
   "No API keys — create one in Keys page": "Žádné klíče API — vytvořte jeden na stránce Klíče",
   "sk_9router (default)": "sk_9router (výchozí)",
   "Server started": "Server spuštěn",
@@ -192,5 +188,5 @@
   "Sudo Password Required": "Je vyžadováno heslo Sudo",
   "Enter your sudo password to start/stop MITM server": "Zadejte heslo sudo pro spuštění/zastavení serveru MITM",
   "Sudo Password": "Heslo sudo",
-  "Confirm": "Potvrdit"
+  "Click to add, click again to remove. Changes are saved automatically.": "Kliknutím přidáte, dalším kliknutím odeberete. Změny se ukládají automaticky."
 }