fix(mesh-ui): rnodePlan computed for the setup modal (strict TS)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

neode-ui/src/components/mesh/MeshDeviceSetupModal.vue

@@ -256,8 +256,8 @@
           <p v-if="effectiveKind === 'meshcore' && rfPreset" class="text-[11px] text-sky-300/80 mt-1">
             MeshCore RF params for {{ selectedRegion?.code }} are applied to the radio automatically on connect.
           </p>
-          <p v-if="effectiveKind === 'reticulum' && form.region && RNODE_REGION_PLANS[form.region]" class="text-[11px] text-sky-300/80 mt-1">
-            RNode plan for {{ form.region }}: {{ (RNODE_REGION_PLANS[form.region].frequency / 1e6).toFixed(4) }} MHz, {{ RNODE_REGION_PLANS[form.region].bandwidth / 1000 }} kHz, SF{{ RNODE_REGION_PLANS[form.region].spreading_factor }}, CR4/{{ RNODE_REGION_PLANS[form.region].coding_rate }}, {{ RNODE_REGION_PLANS[form.region].txpower }} dBm — applied on connect, and the radio confirms it.
+          <p v-if="effectiveKind === 'reticulum' && rnodePlan" class="text-[11px] text-sky-300/80 mt-1">
+            RNode plan for {{ form.region }}: {{ (rnodePlan.frequency / 1e6).toFixed(4) }} MHz, {{ rnodePlan.bandwidth / 1000 }} kHz, SF{{ rnodePlan.spreading_factor }}, CR4/{{ rnodePlan.coding_rate }}, {{ rnodePlan.txpower }} dBm — applied on connect, and the radio confirms it.
           </p>
           <p v-else-if="effectiveKind === 'reticulum'" class="text-[11px] text-sky-300/80 mt-1">
             Pick a region to apply its recommended RNode RF plan on connect — editable any time in Mesh → Device settings.
@@ -376,6 +376,10 @@ const form = ref({
 })
 
 const selectedRegion = computed(() => regionByCode(form.value.region))
+/** The chosen region's recommended RNode RF plan (undefined = none chosen). */
+const rnodePlan = computed(() =>
+  form.value.region ? RNODE_REGION_PLANS[form.value.region] : undefined,
+)
 // The firmware whose options we surface: the probe result wins, else the
 // last connected type, else meshtastic-style (where presets apply).
 const effectiveKind = computed(() => {
@@ -509,12 +513,11 @@ async function applySetup() {
     // same round-trip the Device panel uses — the radio confirms the values
     // itself after the daemon restarts with them. Best-effort here: a
     // failure must not abort the connect the user just asked for.
-    if (effectiveKind.value === 'reticulum' && form.value.region) {
-      const plan = RNODE_REGION_PLANS[form.value.region]
-      if (plan) {
-        mesh.suppressDeviceDetect()
-        void mesh.applyRnodeConfig({ enabled: true, port: null, ...plan }).catch(() => {})
-      }
+    if (effectiveKind.value === 'reticulum' && rnodePlan.value) {
+      mesh.suppressDeviceDetect()
+      void mesh
+        .applyRnodeConfig({ enabled: true, port: null, ...rnodePlan.value })
+        .catch(() => {})
     }
     mesh.dismissDetectedDevice(path)
     void router.push('/dashboard/mesh')