Move ZMQ setting to top level and make advanced fields optional

ZMQ block notifications are important enough to be visible without
expanding Advanced. Advanced fields no longer show a required asterisk
since they all have sane defaults and the entrypoint already falls back
to them via yq.

docker_entrypoint.sh

@@ -47,7 +47,7 @@ export MINDIFF=$(q '.advanced.mindiff // 1000')
 export MAXDIFF=$(q '.advanced.maxdiff // 0')
 export DROPIDLE=$(q '.advanced.dropidle // 0')
 LOG_LEVEL=$(q '.advanced.log-level // "info"')
-ZMQ_ENABLED=$(q '.advanced.zmq-enabled // true')
+ZMQ_ENABLED=$(q '.zmq-enabled // true')
 TLS_ENABLED=$(q '.tls.enabled // "disabled"')
 TLS_PORT=$(q '.tls.port // 3334')
 

scripts/procedures/getConfig.ts

@@ -104,18 +104,25 @@ export const getConfig: T.ExpectedExports.getConfig = compat.getConfig({
       },
     },
   },
+  "zmq-enabled": {
+    "type": "boolean",
+    "name": "Enable ZMQ Block Notifications",
+    "description":
+      "Subscribe to Bitcoin Core's hashblock ZMQ topic for sub-second block detection on the dashboard. Requires zmqpubhashblock enabled on bitcoind.",
+    "default": true,
+  },
   "advanced": {
     "type": "object",
     "name": "Advanced",
     "description":
-      "Fine-tuning knobs for vardiff, logging, and block notifications. Safe to ignore — the defaults work well for Bitaxe-class miners.",
+      "Fine-tuning knobs for vardiff, logging, and block explorer links. Safe to ignore — the defaults work well for Bitaxe-class miners.",
     "spec": {
       "pool-identifier": {
         "type": "string",
         "name": "Coinbase Tag",
         "description":
           "Short string embedded in the coinbase transaction of solved blocks.",
-        "nullable": false,
+        "nullable": true,
         "default": "/Kamado/",
         "masked": false,
         "copyable": false,
@@ -125,7 +132,7 @@ export const getConfig: T.ExpectedExports.getConfig = compat.getConfig({
         "name": "Starting Difficulty",
         "description":
           "Initial vardiff target for new miner connections. Bitaxe-class miners typically land around 16384.",
-        "nullable": false,
+        "nullable": true,
         "default": 16384,
         "range": "[1,*)",
         "integral": true,
@@ -134,7 +141,7 @@ export const getConfig: T.ExpectedExports.getConfig = compat.getConfig({
         "type": "number",
         "name": "Minimum Difficulty",
         "description": "Floor for the vardiff algorithm.",
-        "nullable": false,
+        "nullable": true,
         "default": 1000,
         "range": "[1,*)",
         "integral": true,
@@ -144,7 +151,7 @@ export const getConfig: T.ExpectedExports.getConfig = compat.getConfig({
         "name": "Maximum Difficulty",
         "description":
           "Ceiling for the vardiff algorithm. 0 means no cap.",
-        "nullable": false,
+        "nullable": true,
         "default": 0,
         "range": "[0,*)",
         "integral": true,
@@ -154,18 +161,11 @@ export const getConfig: T.ExpectedExports.getConfig = compat.getConfig({
         "name": "Drop Idle (seconds)",
         "description":
           "Disconnect clients that have not submitted a share in this many seconds. 0 disables the idle disconnect.",
-        "nullable": false,
+        "nullable": true,
         "default": 0,
         "range": "[0,*)",
         "integral": true,
       },
-      "zmq-enabled": {
-        "type": "boolean",
-        "name": "Enable ZMQ Block Notifications",
-        "description":
-          "Subscribe to Bitcoin Core's hashblock ZMQ topic for sub-second chain refresh on the dashboard. Requires zmqpubhashblock on bitcoind.",
-        "default": true,
-      },
       "log-level": {
         "type": "enum",
         "name": "Log Level",
@@ -202,7 +202,7 @@ export const getConfig: T.ExpectedExports.getConfig = compat.getConfig({
               "name": "URL (e.g. your own Mempool instance's address)",
               "description":
                 "Base URL of your mempool instance, e.g. https://mempool.example.com. Kamado will append /address/<addr> and /block/<hash> to it, so the instance must follow the standard mempool.space URL layout.",
-              "nullable": false,
+              "nullable": true,
               "default": "",
               "pattern": "^https?://[^\\s]+$",
               "pattern-description":