chore: 停止追踪生成的 i18n 文件，添加语言切换图标

- 从 git 删除 wwwroot/i18n/{zh,en,jp,ko}/ 生成文件（由 merge_i18n.py 生成）
- 添加 .gitignore 排除生成目录
- 新增 language.svg (globe icon) 替换纯文字语言切换器
- language.ui 改为 VBox: globe图标 + 语言代码标签

.gitignore

@@ -1,85 +1,5 @@
-# Python
-__pycache__/
-*.py[cod]
-*.egg-info/
-dist/
-build/
-
-# Virtual environment
-py3/
-
-# Logs
-logs/
-
-# PID files
-*.pid
-
-# Generated files
-*.pem
-*.key
-merchant_*.pem
-alipay_*.pem
-pay_*.pem
-
-# Database
-models/mysql.ddl.sql
-
-# pkgs (submodules should be in their own repos)
-pkgs/
-
-# wwwroot temp files
-wwwroot/.DS_Store
-wwwroot/*.bak*
-wwwroot/tmp/
-
-# Migration scripts (run once, not needed in repo)
-migrate_*.py
-reset_*.py
-check_*.py
-set_*.sh
-setup_*.sh
-
-# Sage runtime
-sage.pid
-sage_backend.pid
-
-# Swap files
-*.swp
-*.swo
-
-# Module symlinks (created by build.sh)
-wwwroot/accounting
-wwwroot/appbase
-wwwroot/bricks
-wwwroot/charge
-wwwroot/cpcc
-wwwroot/dapi
-wwwroot/dashboard_for_sage
-wwwroot/discount
-wwwroot/filemgr
-wwwroot/harnessed_agent
-wwwroot/harnessed_reasoning
-wwwroot/hermes-web-cli
-wwwroot/llmage
-wwwroot/msp
-wwwroot/platformbiz
-wwwroot/pricing
-wwwroot/product_management
-wwwroot/rag
-wwwroot/rbac
-wwwroot/reallife_asset
-wwwroot/shell_theme.css
-wwwroot/shell_theme.js
-wwwroot/supplychain
-wwwroot/uapi
-wwwroot/unipay
-wwwroot/voucher
-
-# Runtime generated files (created by build.sh)
-conf/config.json
-stop.sh
-start.sh
-sage.service
-*.pyc
-*.pyo
-.DS_Store
+# Generated i18n files — run merge_i18n.py to regenerate
+wwwroot/i18n/zh/
+wwwroot/i18n/en/
+wwwroot/i18n/jp/
+wwwroot/i18n/ko/

wwwroot/i18n/language.svg

@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+  <circle cx="12" cy="12" r="10"/>
+  <line x1="2" y1="12" x2="22" y2="12"/>
+  <path d="M12 2a15.3 15.3 0 0 1 4 10 15.3 15.3 0 0 1-4 10 15.3 15.3 0 0 1-4-10 15.3 15.3 0 0 1 4-10z"/>
+</svg>

wwwroot/i18n/language.ui

@@ -1,13 +1,32 @@
 {
 	"id":"language",
-	"widgettype":"Text",
+	"widgettype":"VBox",
 	"options":{
-		"tip":"change UI language",
-		"i18n":true,
-		"otext":"{{params_kw._lang}}",
 		"cwidth":4,
 		"css":"clickable"
 	},
+	"subwidgets":[
+		{
+			"widgettype":"Svg",
+			"options":{
+				"url":"{{entire_url('language.svg')}}",
+				"rate":2,
+				"valign":"center",
+				"halign":"center"
+			}
+		},
+		{
+			"widgettype":"Text",
+			"id":"lang_label",
+			"options":{
+				"i18n":false,
+				"otext":"{{params_kw._lang}}",
+				"cwidth":4,
+				"css":"text-center",
+				"cfontsize":0.6
+			}
+		}
+	],
 	"binds":[
 		{
 			"wid":"self",
@@ -28,7 +47,7 @@
 			"wid":"app",
 			"event":"lang",
 			"actiontype":"script",
-			"target":"self",
+			"target":"lang_label",
 			"script":"this.set_otext(bricks.app.lang)"
 		}
 	]