feat: add privacy mode, thinking levels, PWA support, and i18n

- Add privacy mode to hide IP and user preferences from AI requests
- Add model thinking levels (low/medium/high) for context analysis depth
- Add PWA support with service worker, manifest, and app icons
- Add SettingsPanel for user preferences (theme, background, language)
- Add i18n translations for en/zh/ja/ko/de/fr
- Add Pinia store for centralized settings management
- Update backend to support user preferences and thinking levels
- Update config to use absolute API URLs

src/utils/api.js

@@ -16,16 +16,36 @@ async function getClientIP() {
     }
 }
 
+import { useSettingsStore } from '../stores/settings'
+
 export async function fetchSuggestion(prefix, suffix, signal, apiUrl = API_URL) {
     try {
+        const settings = useSettingsStore()
         const clientIP = await getClientIP()
         const headers = { 'Content-Type': 'application/json' }
-        if (clientIP) headers['X-Client-IP'] = clientIP
-        
+
+        // Only send IP if privacy mode is OFF
+        if (clientIP && !settings.privacyMode) {
+            headers['X-Client-IP'] = clientIP
+        }
+
+        const body = {
+            prefix,
+            suffix,
+            languageId: 'markdown',
+            model_thinking: settings.modelThinking,
+            privacy_mode: settings.privacyMode,
+            user_preferences: {
+                language: settings.language,
+                currency: settings.currency,
+                timezone: settings.detectedTimezone
+            }
+        }
+
         const res = await fetch(apiUrl, {
             method: 'POST',
             headers,
-            body: JSON.stringify({ prefix, suffix, languageId: 'markdown' }),
+            body: JSON.stringify(body),
             signal
         })
 
@@ -45,10 +65,10 @@ export async function fetchSuggestion(prefix, suffix, signal, apiUrl = API_URL)
             const { done, value } = await reader.read()
             if (done) break
             buffer += new TextDecoder().decode(value)
-            
+
             const lines = buffer.split('\n')
             buffer = lines.pop() || ''
-            
+
             for (const line of lines) {
                 if (!line.startsWith('data: ')) continue
                 const jsonStr = line.slice(6).trim()
@@ -64,7 +84,7 @@ export async function fetchSuggestion(prefix, suffix, signal, apiUrl = API_URL)
                 }
             }
         }
-        
+
         return text
     } catch (e) {
         if (e.name === 'AbortError') {