chore: dev environment — signet testnet stack, mock LND RPCs, faucet button

Switch docker-compose from regtest to signet, add standalone testnet stack
(docker-compose.testnet.yml) with Bitcoin+LND+ThunderHub+Fedimint. Mock
backend now auto-detects Podman/Docker sockets and includes full LND/Lightning
RPC mocks. Dev scripts refactored with boot mode, testnet option, and macOS
EAGAIN fix for port cleanup. Added dev faucet button to Home.vue.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -1,20 +1,21 @@
 services:
-  # Bitcoin Core - regtest mode (no blockchain sync)
+  # Bitcoin Core - signet mode (lightweight testnet, ~200MB sync)
   bitcoin:
     image: lncm/bitcoind:v27.0
     container_name: archy-bitcoin
     ports:
-      - "18443:18443"  # RPC
-      - "18444:18444"  # P2P
+      - "38332:38332"  # RPC
+      - "38333:38333"  # P2P
     volumes:
       - bitcoin-data:/data/.bitcoin
     command: |
-      -regtest
+      -signet
       -server
       -rpcuser=bitcoin
       -rpcpassword=bitcoinpass
       -rpcallowip=0.0.0.0/0
       -rpcbind=0.0.0.0
+      -rpcport=38332
       -txindex=1
       -zmqpubrawblock=tcp://0.0.0.0:28332
       -zmqpubrawtx=tcp://0.0.0.0:28333
@@ -22,18 +23,6 @@ services:
     networks:
       - archy-net
 
-  # Bitcoin Core UI - Web interface
-  bitcoin-ui:
-    image: nginx:alpine
-    container_name: archy-bitcoin-ui
-    ports:
-      - "18445:80"
-    volumes:
-      - ./docker/bitcoin-ui:/usr/share/nginx/html:ro
-    restart: unless-stopped
-    networks:
-      - archy-net
-
   # BTCPay Server
   btcpay:
     image: btcpayserver/btcpayserver:1.13.5
@@ -45,7 +34,7 @@ services:
       BTCPAY_HOST: localhost:14142
       BTCPAY_CHAINS: btc
       BTCPAY_BTCEXPLORERURL: http://mempool:4080
-      BTCPAY_BTCRPCURL: http://bitcoin:18443
+      BTCPAY_BTCRPCURL: http://bitcoin:38332
       BTCPAY_BTCRPCUSER: bitcoin
       BTCPAY_BTCRPCPASSWORD: bitcoinpass
     depends_on:
@@ -109,10 +98,10 @@ services:
     volumes:
       - fedimint-data:/data
     environment:
-      FM_BITCOIND_URL: http://bitcoin:18443
+      FM_BITCOIND_URL: http://bitcoin:38332
       FM_BITCOIND_USERNAME: bitcoin
       FM_BITCOIND_PASSWORD: bitcoinpass
-      FM_BITCOIN_NETWORK: regtest
+      FM_BITCOIN_NETWORK: signet
       FM_BIND_P2P: 0.0.0.0:8173
       FM_BIND_API: 0.0.0.0:8174
       FM_BIND_UI: 0.0.0.0:8175
@@ -134,9 +123,9 @@ services:
       - lnd-data:/root/.lnd
     command: |
       --bitcoin.active
-      --bitcoin.regtest
+      --bitcoin.signet
       --bitcoin.node=bitcoind
-      --bitcoind.rpchost=bitcoin:18443
+      --bitcoind.rpchost=bitcoin:38332
       --bitcoind.rpcuser=bitcoin
       --bitcoind.rpcpass=bitcoinpass
       --bitcoind.zmqpubrawblock=tcp://bitcoin:28332
@@ -144,21 +133,35 @@ services:
       --debuglevel=info
       --rpclisten=0.0.0.0:10009
       --restlisten=0.0.0.0:8080
+      --listen=0.0.0.0:9735
+      --alias=archy-dev
+      --color=#f7931a
       --noseedbackup
+      --accept-keysend
     depends_on:
       - bitcoin
     restart: unless-stopped
     networks:
       - archy-net
 
-  # LND UI - Web interface
-  lnd-ui:
-    image: nginx:alpine
-    container_name: archy-lnd-ui
+  # ThunderHub - Lightning node management UI
+  thunderhub:
+    image: apotdevin/thunderhub:v0.13.31
+    container_name: archy-thunderhub
     ports:
-      - "8085:80"
+      - "3010:3000"
     volumes:
-      - ./docker/lnd-ui:/usr/share/nginx/html:ro
+      - lnd-data:/lnd-data:ro
+      - ./testnet/thunderhub-config.yaml:/data/thubConfig.yaml:ro
+    environment:
+      ACCOUNT_CONFIG_PATH: /data/thubConfig.yaml
+      LOG_LEVEL: info
+      THEME: dark
+      CURRENCY: BTC
+      FETCH_PRICES: "false"
+      FETCH_FEES: "true"
+    depends_on:
+      - lnd
     restart: unless-stopped
     networks:
       - archy-net
@@ -187,7 +190,7 @@ services:
       ELECTRUM_PORT: 50001
       ELECTRUM_TLS_ENABLED: "false"
       CORE_RPC_HOST: bitcoin
-      CORE_RPC_PORT: 18443
+      CORE_RPC_PORT: 38332
       CORE_RPC_USERNAME: bitcoin
       CORE_RPC_PASSWORD: bitcoinpass
       DATABASE_ENABLED: "true"