Merge main into misc-fixes and address PR #202 review

Sync with upstream main and fix required items from review:

- updateTimelineLabels() now uses InterceptTime API (getTimezone/getIANA)
  instead of the stale selectedTimezone/TZ_MAP globals that were removed
  during the earlier InterceptTime refactor — fixes ReferenceError on TZ
  change and pass refresh.

- Remove profiles: [basic] from the intercept service in
  docker-compose.yml so bare `docker compose up -d` still starts the
  main service. Profile-gated services (intercept-history, adsb_db)
  stay as-is.

templates/partials/modes/ais.html

@@ -18,6 +18,23 @@
         </div>
     </div>
 
+    <div class="section">
+        <h3>NMEA UDP Forward</h3>
+        <p class="info-text" style="font-size: 11px; color: var(--text-dim); margin-bottom: 8px;">
+            Forward NMEA 0183 sentences to an external app (e.g. OpenCPN). Leave host blank to disable.
+        </p>
+        <div style="display: flex; gap: 8px;">
+            <div style="flex: 2;">
+                <label style="font-size: 10px; color: var(--text-dim);">Host</label>
+                <input type="text" id="aisUdpHost" placeholder="e.g. 192.168.1.10" style="width: 100%;">
+            </div>
+            <div style="flex: 1;">
+                <label style="font-size: 10px; color: var(--text-dim);">Port</label>
+                <input type="number" id="aisUdpPort" value="10110" min="1" max="65535" style="width: 100%;">
+            </div>
+        </div>
+    </div>
+
     <div class="section">
         <h3>Status</h3>
         <div id="aisStatusDisplay" class="info-text">
@@ -110,11 +127,22 @@
     function startAisTracking() {
         const gain = document.getElementById('aisGainInput').value || '40';
         const device = document.getElementById('deviceSelect')?.value || '0';
+        const udpHost = document.getElementById('aisUdpHost').value.trim();
+        const udpPort = parseInt(document.getElementById('aisUdpPort').value) || 10110;
+
+        const body = {
+            device, gain,
+            bias_t: typeof getBiasTEnabled === 'function' ? getBiasTEnabled() : false,
+        };
+        if (udpHost) {
+            body.udp_host = udpHost;
+            body.udp_port = udpPort;
+        }
 
         fetch('/ais/start', {
             method: 'POST',
             headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({ device, gain, bias_t: typeof getBiasTEnabled === 'function' ? getBiasTEnabled() : false })
+            body: JSON.stringify(body)
         })
         .then(r => r.json())
         .then(data => {

templates/partials/modes/pager.html

@@ -32,7 +32,7 @@
         <h3>Settings</h3>
         <div class="form-group">
             <label for="gain">Gain (dB, 0 = auto)</label>
-            <input type="text" id="gain" value="0" placeholder="0-49 or 0 for auto">
+            <input type="number" id="gain" value="0" min="0" max="50" step="0.5" placeholder="0 = auto">
         </div>
         <div class="form-group">
             <label for="squelch">Squelch Level</label>

templates/partials/modes/radiosonde.html

@@ -278,6 +278,7 @@
 
     // Map management
     let radiosondeMap = null;
+    let radiosondeMapOverlays = null;
     let radiosondeMarkers = new Map();
     let radiosondeTracks = new Map();
     let radiosondeTrackPoints = new Map();
@@ -295,16 +296,23 @@
         }
         const hasLocation = radiosondeStationLocation.lat !== 0 || radiosondeStationLocation.lon !== 0;
 
-        radiosondeMap = L.map('radiosondeMapContainer', {
-            center: hasLocation ? [radiosondeStationLocation.lat, radiosondeStationLocation.lon] : [40, -95],
-            zoom: hasLocation ? 7 : 4,
-            zoomControl: true,
-        });
+        const observerLocation = hasLocation
+            ? { lat: radiosondeStationLocation.lat, lon: radiosondeStationLocation.lon }
+            : { lat: 40, lon: -95 };
 
-        L.tileLayer('https://{s}.basemaps.cartocdn.com/dark_all/{z}/{x}/{y}{r}.png', {
-            attribution: '© OpenStreetMap © CARTO',
+        radiosondeMap = MapUtils.init('radiosondeMapContainer', {
+            center: [observerLocation.lat, observerLocation.lon],
+            zoom: hasLocation ? 7 : 4,
+            minZoom: 2,
             maxZoom: 18,
-        }).addTo(radiosondeMap);
+        });
+        if (radiosondeMap) {
+            window.radiosondeMap = radiosondeMap;
+            radiosondeMapOverlays = MapUtils.addTacticalOverlays(radiosondeMap, {
+                hudPanels: { modeName: 'RADIOSONDE', getContactCount: () => 0 },
+                scaleBar: true,
+            });
+        }
 
         // Add station marker if we have a location
         if (hasLocation) {

templates/partials/modes/sensor.html

@@ -18,7 +18,7 @@
         <h3>Settings</h3>
         <div class="form-group">
             <label for="sensorGain">Gain (dB, 0 = auto)</label>
-            <input type="text" id="sensorGain" value="0" placeholder="0-49 or 0 for auto">
+            <input type="number" id="sensorGain" value="0" min="0" max="50" step="0.5" placeholder="0 = auto">
         </div>
         <div class="form-group">
             <label for="sensorPpm">PPM Correction</label>

templates/partials/modes/tscm.html

@@ -6,14 +6,28 @@
 
                         <div class="form-group">
                             <label>Sweep Type</label>
-                            <select id="tscmSweepType">
+                            <select id="tscmSweepType" onchange="document.getElementById('tscmCustomRangeControls').style.display = this.value === 'custom' ? 'block' : 'none'">
                                 <option value="quick">Quick Scan (2 min)</option>
                                 <option value="standard" selected>Standard (5 min)</option>
                                 <option value="full">Full Sweep (15 min)</option>
                                 <option value="wireless_cameras">Wireless Cameras</option>
                                 <option value="body_worn">Body-Worn Devices</option>
                                 <option value="gps_trackers">GPS Trackers</option>
+                                <option value="custom">Custom Range</option>
                             </select>
+                            <div id="tscmCustomRangeControls" style="display: none; margin-top: 8px;">
+                                <div style="display: flex; gap: 8px;">
+                                    <div style="flex: 1;">
+                                        <label style="font-size: 10px; color: var(--text-dim);">Start (MHz)</label>
+                                        <input type="number" id="tscmCustomStartMhz" value="400" min="1" max="6000" step="1">
+                                    </div>
+                                    <div style="flex: 1;">
+                                        <label style="font-size: 10px; color: var(--text-dim);">End (MHz)</label>
+                                        <input type="number" id="tscmCustomEndMhz" value="500" min="1" max="6000" step="1">
+                                    </div>
+                                </div>
+                                <p class="info-text" style="font-size: 10px; color: var(--text-dim); margin-top: 3px;">Step: 100 kHz. Duration: ~5 min.</p>
+                            </div>
                         </div>
 
                         <div class="form-group">

templates/partials/modes/weather-satellite.html

@@ -92,7 +92,8 @@
         </div>
         <div class="form-group">
             <label>Gain (dB)</label>
-            <input type="number" id="weatherSatGain" value="40" step="0.1" min="0" max="50">
+            <input type="number" id="weatherSatGain" value="30" step="0.1" min="0" max="50">
+            <p class="info-text" style="font-size: 10px; color: var(--text-dim); margin-top: 3px;">Reduce if decoding fails on strong passes (ADC saturation).</p>
         </div>
         <div class="form-group">
             <label style="display: flex; align-items: center; gap: 6px;">

templates/partials/settings-modal.html

@@ -77,6 +77,8 @@
                         <option value="openstreetmap">OpenStreetMap</option>
                         <option value="cartodb_light">CartoDB Positron</option>
                         <option value="esri_world">ESRI World Imagery</option>
+                        <option value="stadia_dark">Stadia Alidade Dark</option>
+                        <option value="tactical">Stadia Tactical (minimal)</option>
                         <option value="custom">Custom URL</option>
                     </select>
                 </div>
@@ -90,6 +92,15 @@
                                onchange="Settings.setCustomTileUrl(this.value)">
                     </div>
                 </div>
+                <div class="settings-row" id="stadiaKeyRow" style="display: none;">
+                    <div class="settings-label" style="width: 100%;">
+                        <span class="settings-label-text">Stadia API Key</span>
+                        <span class="settings-label-desc">Free at <a href="https://client.stadiamaps.com/signup/" target="_blank" style="color: var(--accent-cyan);">stadiamaps.com</a></span>
+                        <input type="text" id="stadiaKeyInput" class="settings-input"
+                               placeholder="your-api-key-here"
+                               onchange="Settings.setStadiaKey(this.value)">
+                    </div>
+                </div>
             </div>
 
             <div class="settings-group">