feat: antenna presets and tuned rotator defaults

Add antenna preset buttons (VHF Yagi, Dual-band, UHF Yagi, Dish) to
the rotator Setup tab that set beam width, tolerance, and update rate
together for common amateur satellite setups.

Defaults now match Dual-band preset (20° beam, 3° tolerance, 2s rate).
Tolerance slider max raised to 10°, update rate max to 20s to
accommodate relaxed VHF tracking setups.

Author: sandrwich

src/stores/beam.svelte.ts

@@ -41,7 +41,7 @@ class BeamStore {
   // Beam aim direction
   aimAz = $state(0);
   aimEl = $state(45);
-  beamWidth = $state(3);
+  beamWidth = $state(20);
 
   // Lock-to-selected tracking
   locked = $state(false);

src/stores/rotator.svelte.ts

@@ -17,6 +17,20 @@ export type ParkPreset = 'north' | 'south' | 'zenith' | 'custom';
 
 export type PassEndAction = 'nothing' | 'park' | 'slew-next';
 
+export interface AntennaPreset {
+  label: string;
+  beamWidth: number;
+  tolerance: number;
+  updateMs: number;
+}
+
+export const ANTENNA_PRESETS: Record<string, AntennaPreset> = {
+  vhf:  { label: 'VHF Yagi',   beamWidth: 30, tolerance: 5,   updateMs: 5000 },
+  dual: { label: 'Dual-band',  beamWidth: 20, tolerance: 3,   updateMs: 2000 },
+  uhf:  { label: 'UHF Yagi',   beamWidth: 18, tolerance: 2,   updateMs: 2000 },
+  dish: { label: 'Dish',       beamWidth: 5,  tolerance: 1,   updateMs: 500 },
+};
+
 export const PARK_PRESETS: Record<Exclude<ParkPreset, 'custom'>, { label: string; az: number; el: number }> = {
   north:  { label: 'North / Horizon', az: 0, el: 0 },
   south:  { label: 'South / Horizon', az: 180, el: 0 },
@@ -29,8 +43,8 @@ class RotatorStore {
   serialProtocol = $state<SerialProtocol>('gs232');
   baudRate = $state(9600);
   wsUrl = $state('ws://localhost:4534');
-  updateIntervalMs = $state(500);
-  tolerance = $state(0.5);
+  updateIntervalMs = $state(2000);
+  tolerance = $state(3.0);
   parkPreset = $state<ParkPreset>('north');
   parkAz = $state(0);
   parkEl = $state(0);
@@ -472,7 +486,7 @@ class RotatorStore {
   }
 
   setUpdateInterval(ms: number): void {
-    this.updateIntervalMs = Math.max(100, Math.min(5000, ms));
+    this.updateIntervalMs = Math.max(100, Math.min(20000, ms));
     this.save('update_interval', this.updateIntervalMs);
     if (this.driver?.connected) {
       this.stopTimers();
@@ -511,7 +525,7 @@ class RotatorStore {
   }
 
   setTolerance(deg: number): void {
-    this.tolerance = Math.max(0, Math.min(5, deg));
+    this.tolerance = Math.max(0, Math.min(10, deg));
     this.save('tolerance', this.tolerance);
   }
 }

src/ui/RotatorWindow.svelte

@@ -7,7 +7,7 @@
   import InfoTip from './shared/InfoTip.svelte';
   import { uiStore } from '../stores/ui.svelte';
   import { beamStore, isInsideBeam } from '../stores/beam.svelte';
-  import { rotatorStore, PARK_PRESETS, type ParkPreset, type PassEndAction } from '../stores/rotator.svelte';
+  import { rotatorStore, PARK_PRESETS, ANTENNA_PRESETS, type ParkPreset, type PassEndAction } from '../stores/rotator.svelte';
   import { timeStore } from '../stores/time.svelte';
   import { satColorRgba } from '../constants';
   import { ViewMode } from '../types';
@@ -89,6 +89,22 @@
   let rateDisplay = $derived(`${(rotatorStore.updateIntervalMs / 1000).toFixed(1)}s`);
   let tolDisplay = $derived(`${rotatorStore.tolerance.toFixed(1)}°`);
 
+  let activeAntennaPreset = $derived.by(() => {
+    for (const [key, p] of Object.entries(ANTENNA_PRESETS)) {
+      if (beamStore.beamWidth === p.beamWidth && rotatorStore.tolerance === p.tolerance && rotatorStore.updateIntervalMs === p.updateMs)
+        return key;
+    }
+    return null;
+  });
+
+  function applyAntennaPreset(key: string) {
+    const p = ANTENNA_PRESETS[key];
+    if (!p) return;
+    beamStore.setBeamWidth(p.beamWidth);
+    rotatorStore.setTolerance(p.tolerance);
+    rotatorStore.setUpdateInterval(p.updateMs);
+  }
+
   // In sky view, rotate the radar so the viewer's look direction is at the top
   let headingRad = $derived(uiStore.viewMode === ViewMode.VIEW_SKY ? uiStore.skyHeading : 0);
 
@@ -880,6 +896,21 @@
 
   {:else}
     <div class="setup-panel">
+      <h4 class="section-header">Antenna</h4>
+      <div class="rot-row">
+        <label>Preset<InfoTip>Sets beam width, tolerance, and update rate for common antenna types.</InfoTip></label>
+        <div class="antenna-presets">
+          {#each Object.entries(ANTENNA_PRESETS) as [key, p]}
+            <Button size="xs" active={activeAntennaPreset === key} onclick={() => applyAntennaPreset(key)}>{p.label}</Button>
+          {/each}
+        </div>
+      </div>
+      <div class="rot-row antenna-summary">
+        <span>Beam {beamStore.beamWidth}°</span>
+        <span>Tolerance {rotatorStore.tolerance}°</span>
+        <span>Rate {rateDisplay}</span>
+      </div>
+
       <h4 class="section-header">Connection</h4>
       <div class="rot-row">
         <label>Mode</label>
@@ -922,12 +953,12 @@
       {/if}
 
       <Slider label="Update rate" display={rateDisplay}
-        min={100} max={5000} step={100} value={rotatorStore.updateIntervalMs}
+        min={100} max={20000} step={100} value={rotatorStore.updateIntervalMs}
         oninput={(e) => rotatorStore.setUpdateInterval(Number((e.target as HTMLInputElement).value))} />
 
       {#snippet tolTip()}<InfoTip>Minimum error before sending a new position command. Reduces wear on the rotator gears. Set to 0 for continuous tracking.</InfoTip>{/snippet}
       <Slider label="Tolerance" display={tolDisplay} tip={tolTip}
-        min={0} max={5} step={0.1} value={rotatorStore.tolerance}
+        min={0} max={10} step={0.5} value={rotatorStore.tolerance}
         oninput={(e) => rotatorStore.setTolerance(Number((e.target as HTMLInputElement).value))} />
 
       <div class="rot-row">
@@ -1252,6 +1283,19 @@
     gap: 4px;
   }
 
+  /* ── Antenna presets ── */
+  .antenna-presets {
+    display: flex;
+    gap: 2px;
+  }
+  .antenna-summary {
+    gap: 10px;
+    justify-content: flex-start;
+    font-size: 9px;
+    color: var(--text-muted);
+    font-variant-numeric: tabular-nums;
+  }
+
   /* ── Setup tab ── */
   .setup-panel {
     padding: 8px;