fix(gpx): replace regex parsing with fast-xml-parser and import tracks alongside waypoints

GPX files containing both <wpt> and <trk> elements would only import
waypoints, silently discarding track geometry. The fallback chain only
parsed <trkpt> when no waypoints were found.

Replaced all regex-based XML parsing helpers with fast-xml-parser for
correctness (namespaces, CDATA, attribute ordering). Tracks are now
always parsed independently of waypoints, with each <trk> element
becoming its own place with route geometry. Fixes #427.

server/package-lock.json

@@ -16,6 +16,7 @@
         "cors": "^2.8.5",
         "dotenv": "^16.4.1",
         "express": "^4.18.3",
+        "fast-xml-parser": "^5.5.10",
         "helmet": "^8.1.0",
         "jsonwebtoken": "^9.0.2",
         "multer": "^2.1.1",
@@ -3251,6 +3252,41 @@
       ],
       "license": "BSD-3-Clause"
     },
+    "node_modules/fast-xml-builder": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/fast-xml-builder/-/fast-xml-builder-1.1.4.tgz",
+      "integrity": "sha512-f2jhpN4Eccy0/Uz9csxh3Nu6q4ErKxf0XIsasomfOihuSUa3/xw6w8dnOtCDgEItQFJG8KyXPzQXzcODDrrbOg==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "path-expression-matcher": "^1.1.3"
+      }
+    },
+    "node_modules/fast-xml-parser": {
+      "version": "5.5.10",
+      "resolved": "https://registry.npmjs.org/fast-xml-parser/-/fast-xml-parser-5.5.10.tgz",
+      "integrity": "sha512-go2J2xODMc32hT+4Xr/bBGXMaIoiCwrwp2mMtAvKyvEFW6S/v5Gn2pBmE4nvbwNjGhpcAiOwEv7R6/GZ6XRa9w==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "fast-xml-builder": "^1.1.4",
+        "path-expression-matcher": "^1.2.1",
+        "strnum": "^2.2.2"
+      },
+      "bin": {
+        "fxparser": "src/cli/cli.js"
+      }
+    },
     "node_modules/file-uri-to-path": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz",
@@ -4585,6 +4621,21 @@
         "node": ">=8"
       }
     },
+    "node_modules/path-expression-matcher": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/path-expression-matcher/-/path-expression-matcher-1.2.1.tgz",
+      "integrity": "sha512-d7gQQmLvAKXKXE2GeP9apIGbMYKz88zWdsn/BN2HRWVQsDFdUY36WSLTY0Jvd4HWi7Fb30gQ62oAOzdgJA6fZw==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/path-key": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
@@ -5437,6 +5488,18 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/strnum": {
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/strnum/-/strnum-2.2.2.tgz",
+      "integrity": "sha512-DnR90I+jtXNSTXWdwrEy9FakW7UX+qUZg28gj5fk2vxxl7uS/3bpI4fjFYVmdK9etptYBPNkpahuQnEwhwECqA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT"
+    },
     "node_modules/superagent": {
       "version": "10.3.0",
       "resolved": "https://registry.npmjs.org/superagent/-/superagent-10.3.0.tgz",