Extract inline CSS/JS, add EJS templates with shared layout

- Extract CSS into public/css/{shared,players,courses}.css
- Extract JS into public/js/{chart,tooltips,progress,players,courses}.js
- Consolidate 5 duplicated tooltip blocks into setupTooltip() helper
- Add EJS view engine with layout partial and nav partial
- Convert HTML pages to EJS templates (index.ejs, courses.ejs)
- Add /courses route with redirect from /courses.html
- Remove old monolithic HTML files (1478 + 612 lines)

package-lock.json

@@ -8,6 +8,7 @@
       "name": "pdga-ratings",
       "version": "1.0.0",
       "dependencies": {
+        "ejs": "^4.0.1",
         "express": "^4.18.2",
         "fs": "^0.0.1-security",
         "puppeteer": "^21.0.0",
@@ -261,13 +262,18 @@
         "node": ">=4"
       }
     },
+    "node_modules/async": {
+      "version": "3.2.6",
+      "resolved": "https://registry.npmjs.org/async/-/async-3.2.6.tgz",
+      "integrity": "sha512-htCUDlxyyCLMgaM3xXg0C0LW2xqfuQ6p05pCEIsXuyQ+a1koYKTuBMzRNwmybfLgvJDMd0r1LTn4+E0Ti6C2AA==",
+      "license": "MIT"
+    },
     "node_modules/b4a": {
       "version": "1.6.7",
       "license": "Apache-2.0"
     },
     "node_modules/balanced-match": {
       "version": "1.0.2",
-      "devOptional": true,
       "license": "MIT"
     },
     "node_modules/bare-events": {
@@ -745,6 +751,21 @@
       "version": "1.1.1",
       "license": "MIT"
     },
+    "node_modules/ejs": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-4.0.1.tgz",
+      "integrity": "sha512-krvQtxc0btwSm/nvnt1UpnaFDFVJpJ0fdckmALpCgShsr/iGYHTnJiUliZTgmzq/UxTX33TtOQVKaNigMQp/6Q==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jake": "^10.9.1"
+      },
+      "bin": {
+        "ejs": "bin/cli.js"
+      },
+      "engines": {
+        "node": ">=0.12.18"
+      }
+    },
     "node_modules/emoji-regex": {
       "version": "8.0.0",
       "license": "MIT"
@@ -1000,6 +1021,36 @@
       "integrity": "sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw==",
       "license": "MIT"
     },
+    "node_modules/filelist": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/filelist/-/filelist-1.0.4.tgz",
+      "integrity": "sha512-w1cEuf3S+DrLCQL7ET6kz+gmlJdbq9J7yXCSjK/OZCPA+qEN1WyF4ZAf0YYJa4/shHJra2t/d/r8SV4Ji+x+8Q==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "minimatch": "^5.0.1"
+      }
+    },
+    "node_modules/filelist/node_modules/brace-expansion": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.2.tgz",
+      "integrity": "sha512-Jt0vHyM+jmUBqojB7E1NIYadt0vI0Qxjxd2TErW94wDz+E2LAm5vKMXXwg6ZZBTHPuUlDgQHKXvjGBdfcF1ZDQ==",
+      "license": "MIT",
+      "dependencies": {
+        "balanced-match": "^1.0.0"
+      }
+    },
+    "node_modules/filelist/node_modules/minimatch": {
+      "version": "5.1.6",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-5.1.6.tgz",
+      "integrity": "sha512-lKwV/1brpG6mBUFHtb7NUmtABCb2WZZmm2wNiOA5hAb8VdCS4B3dtMWyvcoViccwAW/COERjXLt0zP1zXUN26g==",
+      "license": "ISC",
+      "dependencies": {
+        "brace-expansion": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/fill-range": {
       "version": "7.1.1",
       "dev": true,
@@ -1549,6 +1600,23 @@
       "license": "ISC",
       "optional": true
     },
+    "node_modules/jake": {
+      "version": "10.9.4",
+      "resolved": "https://registry.npmjs.org/jake/-/jake-10.9.4.tgz",
+      "integrity": "sha512-wpHYzhxiVQL+IV05BLE2Xn34zW1S223hvjtqk0+gsPrwd/8JNLXJgZZM/iPFsYc1xyphF+6M6EvdE5E9MBGkDA==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "async": "^3.2.6",
+        "filelist": "^1.0.4",
+        "picocolors": "^1.1.1"
+      },
+      "bin": {
+        "jake": "bin/cli.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/js-tokens": {
       "version": "4.0.0",
       "license": "MIT"