feat: add smart flight tracking with AviationStack API + visual progress

- Add 20+ flight fields (terminal, gate, delays, estimated times, etc.)
- Smart polling cron with budget-aware priority queue (100 req/month)
- Tracking phases: FAR_OUT → PRE_DEPARTURE → ACTIVE → LANDED
- Visual FlightProgressBar with animated airplane between airports
- FlightCard with status dots, delay badges, expandable details
- FlightList rewrite: card-based, grouped by status, search/filter
- Dashboard: enriched flight status widget with compact progress bars
- CommandCenter: flight alerts + enriched arrivals with gate/terminal

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

backend/prisma/migrations/20260207182746_add_flight_tracking_fields/migration.sql

@@ -0,0 +1,47 @@
+-- AlterTable
+ALTER TABLE "flights" ADD COLUMN     "aircraftType" TEXT,
+ADD COLUMN     "airlineIata" TEXT,
+ADD COLUMN     "airlineName" TEXT,
+ADD COLUMN     "arrivalBaggage" TEXT,
+ADD COLUMN     "arrivalDelay" INTEGER,
+ADD COLUMN     "arrivalGate" TEXT,
+ADD COLUMN     "arrivalTerminal" TEXT,
+ADD COLUMN     "autoTrackEnabled" BOOLEAN NOT NULL DEFAULT true,
+ADD COLUMN     "departureDelay" INTEGER,
+ADD COLUMN     "departureGate" TEXT,
+ADD COLUMN     "departureTerminal" TEXT,
+ADD COLUMN     "estimatedArrival" TIMESTAMP(3),
+ADD COLUMN     "estimatedDeparture" TIMESTAMP(3),
+ADD COLUMN     "lastApiResponse" JSONB,
+ADD COLUMN     "lastPolledAt" TIMESTAMP(3),
+ADD COLUMN     "liveAltitude" DOUBLE PRECISION,
+ADD COLUMN     "liveDirection" DOUBLE PRECISION,
+ADD COLUMN     "liveIsGround" BOOLEAN,
+ADD COLUMN     "liveLatitude" DOUBLE PRECISION,
+ADD COLUMN     "liveLongitude" DOUBLE PRECISION,
+ADD COLUMN     "liveSpeed" DOUBLE PRECISION,
+ADD COLUMN     "liveUpdatedAt" TIMESTAMP(3),
+ADD COLUMN     "pollCount" INTEGER NOT NULL DEFAULT 0,
+ADD COLUMN     "trackingPhase" TEXT NOT NULL DEFAULT 'FAR_OUT';
+
+-- CreateTable
+CREATE TABLE "flight_api_budget" (
+    "id" TEXT NOT NULL,
+    "monthYear" TEXT NOT NULL,
+    "requestsUsed" INTEGER NOT NULL DEFAULT 0,
+    "requestLimit" INTEGER NOT NULL DEFAULT 100,
+    "lastRequestAt" TIMESTAMP(3),
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "flight_api_budget_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "flight_api_budget_monthYear_key" ON "flight_api_budget"("monthYear");
+
+-- CreateIndex
+CREATE INDEX "flights_trackingPhase_idx" ON "flights"("trackingPhase");
+
+-- CreateIndex
+CREATE INDEX "flights_scheduledDeparture_idx" ON "flights"("scheduledDeparture");