fix: deploy crash + multiple bug fixes + cleanup

- server.js: fix getSiteName() returning string when not installed causing
  'getSiteName(...).then is not a function' crash on homepage (deploy blocker)
- server.js: auto-load business routes after install completes (no restart needed),
  HTML cache keyed by api_key
- install: validate db name/email/password, trigger route loading after complete
- app.js: fix forgot/reset/verify pages rendering HomePage (missing page mapping)
- verify.js: support URL token auto-verification for external registration links
- auth: new email_code template for 6-digit code, reset_password template
  (forgot-password was using verify_email template)
- upload.js: fix MP4 magic-bytes check using undefined buf variable
- tickets.js: status enum validation, anonymous submission rate limit
- security.js: XSS whitelist preserves email template HTML, strips scripts,
  blocks javascript:/data: hrefs; CORS reject returns 403
- bans.js: allow clearing reason/duration, status enum validation
- users.js: fix req.user.role ReferenceError in create user modal
- home.js: tracking results now have detail view button
- .gitignore: ignore data/ (db credentials), logs, session files, temp scripts

.gitignore

@@ -1,11 +1,10 @@
 node_modules/
-data/config.json
-data/uploads/*
-data/*.db
-data/*.db-*
+# 本地运行配置与上传文件(含数据库密码,严禁入库)
+data/
+# 日志与临时文件
 *.log
-*.log
-o.log
-e.log
-err.log
-out.log
+*.tmp.js
+*.tmp.sh
+*.bak
+# 会话记录
+session-*.md