T9-T12: env config + live owner search + responsive (§V11, I.env, I.web)

- config.py: env/.env (python-dotenv), defaults = konstanta lama; get_voters & dashboard pakai config
- dashboard: ?q= server filter + /api/search JSON (substring, LIKE-escape, rank global via correlated count)
- static/app.js: debounced live search; degrades to GET ?q=
- static/style.css: input search + responsive (1024/768/480), list→kartu berlabel di mobile
- test_dashboard: search/API/rank-global/config tests; .env.example; .env gitignored

.gitignore

@@ -4,5 +4,8 @@ scan.log
 __pycache__/
 *.pyc
 
+# local env config (secrets/overrides — jangan di-commit)
+.env
+
 # virtual env (deps installable via requirements.txt)
 venv/