Add i18n language selector to dashboard frontend

- New i18n.js module: window.DCI18n.t(key), language dropdown selector
- Supports 5 languages (en, es, fr, de, ar) with RTL for Arabic
- Translations loaded from /api/v1/i18n/translations/:lang
- Language preference persisted in localStorage
- Added to features.js bundle

status/build.js

@@ -77,6 +77,7 @@ const bundles = {
     // window.wireModal + window.injectModal + window.escapeHtml helpers
     // defined in globals.js (already in core.js).
     JS('share-modal.js'),
+    JS('i18n.js'),
   ],
   'onboarding.js': [
     JS('driver.min.js'),

status/js/i18n.js

@@ -0,0 +1,207 @@
+/**
+ * DC-077: i18n Frontend — Language selector and translation system
+ * 
+ * Provides window.DCI18n.t(key) for the dashboard frontend.
+ * Loads translations from /api/v1/i18n/translations/:lang
+ * Language preference stored in localStorage.
+ * Handles RTL for Arabic.
+ */
+(function () {
+  'use strict';
+
+  const STORAGE_KEY = 'dashcaddy-language';
+  const DEFAULT_LANG = 'en';
+  const SUPPORTED_LANGS = ['en', 'es', 'fr', 'de', 'ar'];
+  const LANG_NAMES = {
+    en: 'English', es: 'Español', fr: 'Français', de: 'Deutsch', ar: 'العربية',
+  };
+
+  let currentLang = localStorage.getItem(STORAGE_KEY) || DEFAULT_LANG;
+  let translations = {};
+  let loaded = false;
+
+  async function loadTranslations(lang) {
+    if (lang === DEFAULT_LANG) {
+      translations = {}; // English is the default — no translation needed
+      loaded = true;
+      return;
+    }
+    try {
+      const res = await fetch(`/api/v1/i18n/translations/${lang}`);
+      if (res.ok) {
+        const data = await res.json();
+        translations = data.translations || {};
+        loaded = true;
+      }
+    } catch (e) {
+      console.warn('[i18n] Failed to load translations for', lang, e);
+    }
+  }
+
+  function t(key) {
+    if (currentLang === DEFAULT_LANG) return key;
+    return translations[key] || key;
+  }
+
+  function setLanguage(lang) {
+    if (!SUPPORTED_LANGS.includes(lang)) return;
+    currentLang = lang;
+    localStorage.setItem(STORAGE_KEY, lang);
+
+    // RTL handling
+    const isRtl = lang === 'ar';
+    document.documentElement.dir = isRtl ? 'rtl' : 'ltr';
+    document.documentElement.lang = lang;
+
+    loadTranslations(lang).then(() => {
+      applyTranslations();
+    });
+  }
+
+  function getLanguage() {
+    return currentLang;
+  }
+
+  function applyTranslations() {
+    // Apply translations to elements with data-i18n attributes
+    document.querySelectorAll('[data-i18n]').forEach(el => {
+      const key = el.getAttribute('data-i18n');
+      const translated = t(key);
+      if (translated && translated !== key) {
+        el.textContent = translated;
+      }
+    });
+    // Apply to placeholders
+    document.querySelectorAll('[data-i18n-placeholder]').forEach(el => {
+      const key = el.getAttribute('data-i18n-placeholder');
+      const translated = t(key);
+      if (translated && translated !== key) {
+        el.placeholder = translated;
+      }
+    });
+    // Apply to titles
+    document.querySelectorAll('[data-i18n-title]').forEach(el => {
+      const key = el.getAttribute('data-i18n-title');
+      const translated = t(key);
+      if (translated && translated !== key) {
+        el.title = translated;
+      }
+    });
+  }
+
+  function createLanguageSelector() {
+    // Find the top bar area to insert the selector
+    // Look for the auth-settings area or the header actions
+    const targetContainer = document.querySelector('.header-actions') ||
+                            document.querySelector('#auth-settings-btn')?.parentElement ||
+                            document.querySelector('.top-bar-actions');
+
+    if (!targetContainer) {
+      // If we can't find a target, try to add it near the settings button
+      const settingsBtn = document.getElementById('auth-settings-btn');
+      if (settingsBtn && settingsBtn.parentElement) {
+        return createDropdown(settingsBtn.parentElement);
+      }
+      return null;
+    }
+
+    return createDropdown(targetContainer);
+  }
+
+  function createDropdown(container) {
+    // Check if selector already exists
+    if (document.getElementById('dc-lang-selector')) return;
+
+    const wrapper = document.createElement('div');
+    wrapper.id = 'dc-lang-selector';
+    wrapper.style.cssText = 'display: inline-flex; align-items: center; gap: 4px; margin: 0 8px; position: relative;';
+
+    const btn = document.createElement('button');
+    btn.id = 'dc-lang-btn';
+    btn.className = 'lang-selector-btn';
+    btn.style.cssText = 'background: var(--card-base, #2a2a3e); border: 1px solid var(--border, #3a3a4e); color: var(--text-primary, #e0e0e0); padding: 6px 10px; border-radius: 6px; cursor: pointer; font-size: 0.8rem; display: flex; align-items: center; gap: 4px;';
+    btn.innerHTML = `🌐 <span class="lang-current">${currentLang.toUpperCase()}</span>`;
+    btn.title = 'Language / Idioma / Langue / Sprache / اللغة';
+
+    const dropdown = document.createElement('div');
+    dropdown.id = 'dc-lang-dropdown';
+    dropdown.style.cssText = 'display: none; position: absolute; top: 100%; right: 0; margin-top: 4px; background: var(--card-base, #2a2a3e); border: 1px solid var(--border, #3a3a4e); border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.3); z-index: 9999; min-width: 140px; overflow: hidden;';
+
+    SUPPORTED_LANGS.forEach(lang => {
+      const item = document.createElement('div');
+      item.className = 'lang-option';
+      item.style.cssText = 'padding: 8px 14px; cursor: pointer; display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-primary, #e0e0e0);';
+      item.onmouseenter = () => item.style.background = 'var(--card-hover, rgba(255,255,255,0.05))';
+      item.onmouseleave = () => item.style.background = 'transparent';
+
+      const flag = document.createElement('span');
+      flag.textContent = lang === currentLang ? '✓' : '';
+      flag.style.cssText = 'width: 16px; color: var(--ok-fg, #4ade80);';
+
+      const name = document.createElement('span');
+      name.textContent = LANG_NAMES[lang];
+
+      item.appendChild(flag);
+      item.appendChild(name);
+      item.onclick = () => {
+        setLanguage(lang);
+        dropdown.style.display = 'none';
+        // Update button text
+        btn.querySelector('.lang-current').textContent = lang.toUpperCase();
+        // Update checkmarks
+        dropdown.querySelectorAll('.lang-option').forEach((opt, i) => {
+          opt.querySelector('span').textContent = SUPPORTED_LANGS[i] === lang ? '✓' : '';
+        });
+        // Show notification
+        if (window.showNotification) {
+          window.showNotification(`Language: ${LANG_NAMES[lang]}`, 'info');
+        }
+      };
+      dropdown.appendChild(item);
+    });
+
+    btn.onclick = (e) => {
+      e.stopPropagation();
+      dropdown.style.display = dropdown.style.display === 'none' ? 'block' : 'none';
+    };
+
+    // Close on outside click
+    document.addEventListener('click', (e) => {
+      if (!wrapper.contains(e.target)) {
+        dropdown.style.display = 'none';
+      }
+    });
+
+    wrapper.appendChild(btn);
+    wrapper.appendChild(dropdown);
+    container.insertBefore(wrapper, container.firstChild);
+
+    return wrapper;
+  }
+
+  // Initialize on page load
+  function init() {
+    // Set initial RTL if needed
+    if (currentLang === 'ar') {
+      document.documentElement.dir = 'rtl';
+      document.documentElement.lang = 'ar';
+    }
+
+    // Create the language selector after DOM is ready
+    if (document.readyState === 'loading') {
+      document.addEventListener('DOMContentLoaded', () => {
+        createLanguageSelector();
+        if (currentLang !== DEFAULT_LANG) loadTranslations(currentLang).then(applyTranslations);
+      });
+    } else {
+      createLanguageSelector();
+      if (currentLang !== DEFAULT_LANG) loadTranslations(currentLang).then(applyTranslations);
+    }
+  }
+
+  // Expose globally
+  window.DCI18n = { t, setLanguage, getLanguage, applyTranslations, loadTranslations };
+
+  // Auto-init
+  init();
+})();

status/sw.js

@@ -1,4 +1,4 @@
-const CACHE = 'dashcaddy-shell-d655ab9676';
+const CACHE = 'dashcaddy-shell-c775f8444e';
 const PRECACHE = [
   '/',
   '/index.html',