feat: add i18n, platform channels page, and WeChat QR login

- Add vue-i18n with auto-detect browser language and manual toggle (EN/中文)
- Move platform channels to separate page with credential management
- Support Telegram, Discord, Slack, WhatsApp, Matrix, Feishu, Weixin, WeCom
- Add WeChat QR code login (opens in browser, polls status, auto-saves)
- Write platform credentials to ~/.hermes/.env matching hermes gateway setup
- Auto restart gateway after platform config changes
- Add settings store with per-section save for all config categories
- Persist session group collapse state across navigation
- Fix pre-existing TypeScript build errors

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/api/config.ts

@@ -0,0 +1,114 @@
+import { request } from './client'
+
+export interface DisplayConfig {
+  compact?: boolean
+  personality?: string
+  resume_display?: string
+  busy_input_mode?: string
+  bell_on_complete?: boolean
+  show_reasoning?: boolean
+  streaming?: boolean
+  inline_diffs?: boolean
+  show_cost?: boolean
+  skin?: string
+}
+
+export interface AgentConfig {
+  max_turns?: number
+  gateway_timeout?: number
+  restart_drain_timeout?: number
+  service_tier?: string
+  tool_use_enforcement?: string
+}
+
+export interface MemoryConfig {
+  memory_enabled?: boolean
+  user_profile_enabled?: boolean
+  memory_char_limit?: number
+  user_char_limit?: number
+}
+
+export interface SessionResetConfig {
+  mode?: string
+  idle_minutes?: number
+  at_hour?: number
+}
+
+export interface PrivacyConfig {
+  redact_pii?: boolean
+}
+
+export interface AppConfig {
+  display?: DisplayConfig
+  agent?: AgentConfig
+  memory?: MemoryConfig
+  session_reset?: SessionResetConfig
+  privacy?: PrivacyConfig
+  telegram?: Record<string, any>
+  discord?: Record<string, any>
+  slack?: Record<string, any>
+  whatsapp?: Record<string, any>
+  matrix?: Record<string, any>
+  weixin?: Record<string, any>
+  wecom?: Record<string, any>
+  feishu?: Record<string, any>
+  dingtalk?: Record<string, any>
+  platforms?: Record<string, any>
+  [key: string]: any
+}
+
+export async function fetchConfig(sections?: string[]): Promise<AppConfig> {
+  const query = sections ? `?sections=${sections.join(',')}` : ''
+  return request<AppConfig>(`/api/config${query}`)
+}
+
+export async function updateConfigSection(
+  section: string,
+  values: Record<string, any>,
+): Promise<void> {
+  await request('/api/config', {
+    method: 'PUT',
+    body: JSON.stringify({ section, values }),
+  })
+}
+
+export async function saveCredentials(
+  platform: string,
+  values: Record<string, any>,
+): Promise<void> {
+  await request('/api/config/credentials', {
+    method: 'PUT',
+    body: JSON.stringify({ platform, values }),
+  })
+}
+
+export interface WeixinQrCode {
+  qrcode: string
+  qrcode_url: string
+}
+
+export interface WeixinQrStatus {
+  status: 'wait' | 'scaned' | 'scaned_but_redirect' | 'expired' | 'confirmed'
+  account_id?: string
+  token?: string
+  base_url?: string
+}
+
+export async function fetchWeixinQrCode(): Promise<WeixinQrCode> {
+  return request<WeixinQrCode>('/api/weixin/qrcode')
+}
+
+export async function pollWeixinQrStatus(qrcode: string): Promise<WeixinQrStatus> {
+  return request<WeixinQrStatus>(`/api/weixin/qrcode/status?qrcode=${encodeURIComponent(qrcode)}`)
+}
+
+export async function saveWeixinCredentials(data: {
+  account_id: string
+  token: string
+  base_url?: string
+}): Promise<void> {
+  await request('/api/weixin/save', {
+    method: 'POST',
+    body: JSON.stringify(data),
+  })
+}