Add pagination/search/sort to the admin tables that can grow large

Uses simple-datatables (vanilla JS, no jQuery needed) on the Users,
Sessions, Email Log, and Feedback tables, since those grow with real
usage. Left Games (small, admin-curated) and Hints (row order is
meaningful - "checked in order" - a sortable column would mislead)
untouched.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

package-lock.json

@@ -11,7 +11,8 @@
       "dependencies": {
         "@popperjs/core": "^2.11.8",
         "bootstrap": "^5.3.8",
-        "bootstrap-icons": "^1.13.1"
+        "bootstrap-icons": "^1.13.1",
+        "simple-datatables": "^10.3.0"
       },
       "devDependencies": {
         "@babel/core": "^7.25.0",
@@ -4013,6 +4014,12 @@
       "dev": true,
       "license": "CC0-1.0"
     },
+    "node_modules/dayjs": {
+      "version": "1.11.23",
+      "resolved": "https://registry.npmjs.org/dayjs/-/dayjs-1.11.23.tgz",
+      "integrity": "sha512-QDTCU0M0MxR3hQfnlDJfwekQiaanm1ubOD231u73WBckQ/fsamwRLiE2GBz6D3a/xF1NgfiDLJjXBa1hYOYTtQ==",
+      "license": "MIT"
+    },
     "node_modules/debug": {
       "version": "4.4.3",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.3.tgz",
@@ -4112,6 +4119,12 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/diff-dom": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/diff-dom/-/diff-dom-5.2.1.tgz",
+      "integrity": "sha512-G6WquwIa/XOxiYDYRMxfJj+c+a6LXMv7zgXoAQ3eRjTYkc8Lc4Aq97krTu/B15r243FR7dyeSxDenzKtO6sbfA==",
+      "license": "LGPL-3.0"
+    },
     "node_modules/dns-packet": {
       "version": "5.6.1",
       "resolved": "https://registry.npmjs.org/dns-packet/-/dns-packet-5.6.1.tgz",
@@ -7706,6 +7719,16 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/simple-datatables": {
+      "version": "10.3.0",
+      "resolved": "https://registry.npmjs.org/simple-datatables/-/simple-datatables-10.3.0.tgz",
+      "integrity": "sha512-/9XcZ/AzZWYNMTTwUcUqsNhZXD1KIHg4tWCUhRx5qPDOnRVG2gNdRDR1euNTCbQxfAypu78ucgWc/BOMFfuxAQ==",
+      "license": "LGPL-3.0",
+      "dependencies": {
+        "dayjs": "^1.11.21",
+        "diff-dom": "5.2.1"
+      }
+    },
     "node_modules/sockjs": {
       "version": "0.3.24",
       "resolved": "https://registry.npmjs.org/sockjs/-/sockjs-0.3.24.tgz",