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

.env.example

@@ -0,0 +1,21 @@
+# Salin ke `.env` lalu sesuaikan. Semua opsional — default di `config.py`.
+# Nilai dari env shell (export) juga didahulukan lewat os.getenv.
+
+# Akun Block Producer yang dicari
+VEX_TARGET_BP=databisnisid
+
+# Node RPC publik Vexanium (ganti bila node utama lambat/timeout)
+VEX_API_NODE=https://v2.vexascan.com:2096
+
+# Lokasi file SQLite (disarankan absolut bila dijadwalkan via cron)
+VEX_DB_PATH=voters.db
+
+# Syarat minimum stake (VEX) agar pemilih disimpan
+VEX_MIN_STAKED_VEX=1000
+
+# Dashboard: jumlah baris per halaman
+DASH_PAGE_SIZE=50
+
+# Dashboard: host & port server
+DASH_HOST=127.0.0.1
+DASH_PORT=5000