feat: v1.2.0-alpha — E2E encrypted mesh relay, steganography, relay status polling

Phase 5 mesh networking:
- E2E encrypted TX relay (X25519 + ChaCha20-Poly1305) — non-Archy nodes
  relay encrypted blobs transparently via Meshcore native routing
- Steganographic encoding modes (WeatherStation, SensorNetwork) — traffic
  looks like sensor data on the wire, 0xAA marker, configurable per-node
- Pre-flight Bitcoin Core health check on relay node — specific error codes
  (bitcoin_unreachable, bitcoin_syncing, tx_rejected) instead of generic fails
- mesh.relay-status RPC endpoint — frontend polls for relay result every 3s
- On-Chain / Lightning tabs in Off-Grid Bitcoin panel
- Archy Peers vs Mesh Broadcast relay mode selector
- Mesh view fills viewport (no page scroll), internal panel scrolling
- Version bump to 1.2.0-alpha

Also includes: deploy hardening, container fixes, IndeedHub updates,
boot screen, dashboard improvements, MASTER_PLAN task tracking

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

neode-ui/src/stores/mesh.ts

@@ -327,10 +327,10 @@ export const useMeshStore = defineStore('mesh', () => {
     }
   }
 
-  async function relayTransaction(txHex: string) {
+  async function relayTransaction(txHex: string, mode: 'archy' | 'broadcast' = 'archy') {
     return rpcClient.call<{ request_id: number; queued: boolean; tx_hex_len: number }>({
       method: 'mesh.relay-tx',
-      params: { tx_hex: txHex },
+      params: { tx_hex: txHex, relay_mode: mode },
     })
   }
 
@@ -341,6 +341,20 @@ export const useMeshStore = defineStore('mesh', () => {
     })
   }
 
+  async function relayStatus(requestId: number) {
+    return rpcClient.call<{
+      status: 'pending' | 'confirmed' | 'failed' | 'unknown'
+      request_id: number
+      txid?: string
+      error?: string
+      error_code?: string
+      completed_at?: string
+    }>({
+      method: 'mesh.relay-status',
+      params: { request_id: requestId },
+    })
+  }
+
   async function refreshAll() {
     await Promise.all([fetchStatus(), fetchPeers(), fetchMessages(), fetchDeadmanStatus(), fetchBlockHeaders()])
   }
@@ -377,5 +391,6 @@ export const useMeshStore = defineStore('mesh', () => {
     fetchBlockHeaders,
     relayTransaction,
     relayLightning,
+    relayStatus,
   }
 })