v0.9.0: in-app auto-updater, ship toggle split, stable entity IDs, performance fixes

New features:
- In-app auto-updater with confirmation dialog, manual download fallback,
  restart polling, and protected file safety net
- Ship layers split into 4 independent toggles (Military/Carriers, Cargo/Tankers,
  Civilian, Cruise/Passenger) with per-category counts
- Stable entity IDs using MMSI/callsign instead of volatile array indices
- Dismissible threat alert bubbles (session-scoped, survives data refresh)

Performance:
- GDELT title fetching is now non-blocking (background enrichment)
- Removed duplicate startup fetch jobs
- Docker healthcheck start_period 15s → 90s

Bug fixes:
- Removed fake intelligence assessment generator (OSINT-only policy)
- Fixed carrier tracker GDELT 429/TypeError crash
- Fixed ETag collision (full payload hash)
- Added concurrent /api/refresh guard

Contributors: @imqdcr (ship split + stable IDs), @csysp (dismissible alerts, PR #48)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Former-commit-id: a2c4c67da54345393f70a9b33b52e7e4fd6c049f

frontend/src/utils/aircraftClassification.ts

@@ -0,0 +1,12 @@
+// ICAO type code -> aircraft shape classification
+export const HELI_TYPES = new Set(['R22', 'R44', 'R66', 'B06', 'B05', 'B47G', 'B105', 'B212', 'B222', 'B230', 'B407', 'B412', 'B429', 'B430', 'B505', 'BK17', 'S55', 'S58', 'S61', 'S64', 'S70', 'S76', 'S92', 'A109', 'A119', 'A139', 'A169', 'A189', 'AW09', 'EC20', 'EC25', 'EC30', 'EC35', 'EC45', 'EC55', 'EC75', 'H125', 'H130', 'H135', 'H145', 'H155', 'H160', 'H175', 'H215', 'H225', 'AS32', 'AS35', 'AS50', 'AS55', 'AS65', 'MD52', 'MD60', 'MDHI', 'MD90', 'NOTR', 'HUEY', 'GAMA', 'CABR', 'EXE', 'R300', 'R480', 'LAMA', 'ALLI', 'PUMA', 'NH90', 'CH47', 'UH1', 'UH60', 'AH64', 'MI8', 'MI24', 'MI26', 'MI28', 'KA52', 'K32', 'LYNX', 'WILD', 'MRLX', 'A149', 'A119']);
+export const TURBOPROP_TYPES = new Set(['AT43', 'AT45', 'AT72', 'AT73', 'AT75', 'AT76', 'B190', 'B350', 'BE20', 'BE30', 'BE40', 'BE9L', 'BE99', 'C130', 'C160', 'C208', 'C212', 'C295', 'CN35', 'D228', 'D328', 'DHC2', 'DHC3', 'DHC4', 'DHC5', 'DHC6', 'DHC7', 'DHC8', 'DO28', 'DH8A', 'DH8B', 'DH8C', 'DH8D', 'E110', 'E120', 'F27', 'F406', 'F50', 'G159', 'G73T', 'J328', 'JS31', 'JS32', 'JS41', 'L188', 'MA60', 'M28', 'N262', 'P68', 'P180', 'PA31', 'PA42', 'PC12', 'PC21', 'PC24', 'S2', 'S340', 'SF34', 'SF50', 'SW4', 'TRIS', 'TBM7', 'TBM8', 'TBM9', 'C30J', 'C5M', 'AN12', 'AN24', 'AN26', 'AN30', 'AN32', 'IL18', 'L410', 'Y12', 'BALL', 'AEST', 'AC68', 'AC80', 'AC90', 'AC95', 'AC11', 'C172', 'C182', 'C206', 'C210', 'C310', 'C337', 'C402', 'C414', 'C421', 'C425', 'C441', 'M20P', 'M20T', 'PA28', 'PA32', 'PA34', 'PA44', 'PA46', 'PA60', 'P28A', 'P28B', 'P28R', 'P32R', 'P46T', 'SR20', 'SR22', 'DA40', 'DA42', 'DA62', 'RV10', 'BE33', 'BE35', 'BE36', 'BE55', 'BE58', 'DR40', 'TB20', 'AA5']);
+export const BIZJET_TYPES = new Set(['ASTR', 'C25A', 'C25B', 'C25C', 'C25M', 'C500', 'C501', 'C510', 'C525', 'C526', 'C550', 'C551', 'C560', 'C56X', 'C650', 'C680', 'C700', 'C750', 'CL30', 'CL35', 'CL60', 'CONI', 'CRJX', 'E35L', 'E45X', 'E50P', 'E55P', 'F2TH', 'F900', 'FA10', 'FA20', 'FA50', 'FA7X', 'FA8X', 'G100', 'G150', 'G200', 'G280', 'GA5C', 'GA6C', 'GALX', 'GL5T', 'GL7T', 'GLEX', 'GLF2', 'GLF3', 'GLF4', 'GLF5', 'GLF6', 'H25A', 'H25B', 'H25C', 'HA4T', 'HDJT', 'LJ23', 'LJ24', 'LJ25', 'LJ28', 'LJ31', 'LJ35', 'LJ40', 'LJ45', 'LJ55', 'LJ60', 'LJ70', 'LJ75', 'MU30', 'PC24', 'PRM1', 'SBR1', 'SBR2', 'WW24', 'BE40', 'BLCF']);
+
+export function classifyAircraft(model: string, category?: string): 'heli' | 'turboprop' | 'bizjet' | 'airliner' {
+    const m = (model || '').toUpperCase();
+    if (category === 'heli' || HELI_TYPES.has(m)) return 'heli';
+    if (BIZJET_TYPES.has(m)) return 'bizjet';
+    if (TURBOPROP_TYPES.has(m)) return 'turboprop';
+    return 'airliner';
+}

frontend/src/utils/positioning.ts

@@ -0,0 +1,23 @@
+// --- Smooth position interpolation helpers ---
+// Given heading (degrees) and speed (knots), compute new lat/lng after dt seconds
+export function interpolatePosition(lat: number, lng: number, headingDeg: number, speedKnots: number, dtSeconds: number, maxDist = 0, maxDt = 65): [number, number] {
+    if (!speedKnots || speedKnots <= 0 || dtSeconds <= 0) return [lat, lng];
+    // Cap interpolation time to prevent runaway drift when data is stale
+    const clampedDt = Math.min(dtSeconds, maxDt);
+    // 1 knot = 1 nautical mile/hour = 1852 m/h
+    const speedMps = speedKnots * 0.5144; // meters per second
+    const dist = maxDist > 0 ? Math.min(speedMps * clampedDt, maxDist) : speedMps * clampedDt;
+    const R = 6371000; // Earth radius in meters
+    const headingRad = (headingDeg * Math.PI) / 180;
+    const latRad = (lat * Math.PI) / 180;
+    const lngRad = (lng * Math.PI) / 180;
+    const newLatRad = Math.asin(
+        Math.sin(latRad) * Math.cos(dist / R) +
+        Math.cos(latRad) * Math.sin(dist / R) * Math.cos(headingRad)
+    );
+    const newLngRad = lngRad + Math.atan2(
+        Math.sin(headingRad) * Math.sin(dist / R) * Math.cos(latRad),
+        Math.cos(dist / R) - Math.sin(latRad) * Math.sin(newLatRad)
+    );
+    return [(newLatRad * 180) / Math.PI, (newLngRad * 180) / Math.PI];
+}