[mod] client/simple: client plugins (#5406)

* [mod] client/simple: client plugins

Defines a new interface for client side *"plugins"* that coexist with server
side plugin system. Each plugin (e.g., `InfiniteScroll`) extends the base
`ts Plugin`. Client side plugins are independent and lazy‑loaded via `router.ts`
when their `load()` conditions are met. On each navigation request, all
applicable plugins are instanced.

Since these are client side plugins, we can only invoke them once DOM is fully
loaded. E.g. `Calculator` will not render a new `answer` block until fully
loaded and executed.

For some plugins, we might want to handle its availability in `settings.yml`
and toggle in UI, like we do for server side plugins. In that case, we extend
`py Plugin` instancing only the information and then checking client side if
[`settings.plugins`](https://github.com/inetol/searxng/blob/1ad832b1dc33f3f388da361ff2459b05dc86a164/client/simple/src/js/toolkit.ts#L134)
array has the plugin id.

* [mod] client/simple: rebuild static

1 files changed, 151 insertions, 22 deletions

diff --git a/client/simple/package-lock.json b/client/simple/package-lock.json
index e19ebfbb4..b35f4dd43 100644
--- a/client/simple/package-lock.json
+++ b/client/simple/package-lock.json
@@ -22,6 +22,7 @@
         "edge.js": "~6.3.0",
         "less": "~4.4.2",
         "lightningcss": "~1.30.2",
+        "mathjs": "~15.0.0",
         "sharp": "~0.34.5",
         "sort-package-json": "~3.5.0",
         "stylelint": "~16.26.0",
@@ -58,6 +59,16 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@babel/runtime": {
+      "version": "7.28.4",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.28.4.tgz",
+      "integrity": "sha512-Q/N6JNWvIvPnLDvjlE1OUBLPQHH6l3CltCEsHIujp45zQUSSh8K+gHnaEX45yAT1nyngnINhvWtzN+Nb9D8RAQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
     "node_modules/@biomejs/biome": {
       "version": "2.3.8",
       "resolved": "https://registry.npmjs.org/@biomejs/biome/-/biome-2.3.8.tgz",
@@ -269,6 +280,26 @@
         "@csstools/css-tokenizer": "^3.0.4"
       }
     },
+    "node_modules/@csstools/css-syntax-patches-for-csstree": {
+      "version": "1.0.20",
+      "resolved": "https://registry.npmjs.org/@csstools/css-syntax-patches-for-csstree/-/css-syntax-patches-for-csstree-1.0.20.tgz",
+      "integrity": "sha512-8BHsjXfSciZxjmHQOuVdW2b8WLUPts9a+mfL13/PzEviufUEW2xnvQuOlKs9dRBHgRqJ53SF/DUoK9+MZk72oQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT-0",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@csstools/css-tokenizer": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/@csstools/css-tokenizer/-/css-tokenizer-3.0.4.tgz",
@@ -1567,9 +1598,9 @@
       "license": "MIT"
     },
     "node_modules/baseline-browser-mapping": {
-      "version": "2.8.30",
-      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.8.30.tgz",
-      "integrity": "sha512-aTUKW4ptQhS64+v2d6IkPzymEzzhw+G0bA1g3uBRV3+ntkH+svttKseW5IOR4Ed6NUVKqnY7qT3dKvzQ7io4AA==",
+      "version": "2.8.32",
+      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.8.32.tgz",
+      "integrity": "sha512-OPz5aBThlyLFgxyhdwf/s2+8ab3OvT7AdTNvKHBwpXomIYeXqpUUuT8LrdtxZSsWJ4R4CU1un4XGh5Ez3nlTpw==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
@@ -1685,9 +1716,9 @@
       }
     },
     "node_modules/caniuse-lite": {
-      "version": "1.0.30001756",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001756.tgz",
-      "integrity": "sha512-4HnCNKbMLkLdhJz3TToeVWHSnfJvPaq6vu/eRP0Ahub/07n484XHhBF5AJoSGHdVrS8tKFauUQz8Bp9P7LVx7A==",
+      "version": "1.0.30001757",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001757.tgz",
+      "integrity": "sha512-r0nnL/I28Zi/yjk1el6ilj27tKcdjLsNqAOZr0yVjWPrSQyHgKI2INaEWw21bAQSv2LXRt1XuCS/GomNpWOxsQ==",
       "dev": true,
       "funding": [
         {
@@ -1762,6 +1793,20 @@
         "node": ">=16"
       }
     },
+    "node_modules/complex.js": {
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/complex.js/-/complex.js-2.4.3.tgz",
+      "integrity": "sha512-UrQVSUur14tNX6tiP4y8T4w4FeJAX3bi2cIv0pu/DTLFNxoq7z2Yh83Vfzztj6Px3X/lubqQ9IrPp7Bpn6p4MQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "*"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/rawify"
+      }
+    },
     "node_modules/copy-anything": {
       "version": "2.0.6",
       "resolved": "https://registry.npmjs.org/copy-anything/-/copy-anything-2.0.6.tgz",
@@ -1923,6 +1968,13 @@
         }
       }
     },
+    "node_modules/decimal.js": {
+      "version": "10.6.0",
+      "resolved": "https://registry.npmjs.org/decimal.js/-/decimal.js-10.6.0.tgz",
+      "integrity": "sha512-YpgQiITW3JXGntzdUmyUR1V812Hn8T1YVXhCu+wO3OpS4eU9l4YdD3qjyiKdV6mvV29zapkMeD390UVEf2lkUg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/detect-indent": {
       "version": "7.0.2",
       "resolved": "https://registry.npmjs.org/detect-indent/-/detect-indent-7.0.2.tgz",
@@ -2102,9 +2154,9 @@
       }
     },
     "node_modules/electron-to-chromium": {
-      "version": "1.5.259",
-      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.259.tgz",
-      "integrity": "sha512-I+oLXgpEJzD6Cwuwt1gYjxsDmu/S/Kd41mmLA3O+/uH2pFRO/DvOjUyGozL8j3KeLV6WyZ7ssPwELMsXCcsJAQ==",
+      "version": "1.5.262",
+      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.262.tgz",
+      "integrity": "sha512-NlAsMteRHek05jRUxUR0a5jpjYq9ykk6+kO0yRaMi5moe7u0fVIOeQ3Y30A8dIiWFBNUoQGi1ljb1i5VtS9WQQ==",
       "dev": true,
       "license": "ISC"
     },
@@ -2185,6 +2237,13 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/escape-latex": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/escape-latex/-/escape-latex-1.2.0.tgz",
+      "integrity": "sha512-nV5aVWW1K0wEiUIEdZ4erkGGH8mDxGyxSeqPzRNtWP7ataw+/olFObw7hujFWlVjNsaDFw5VZ5NzVSIqRgfTiw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/fast-deep-equal": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
@@ -2305,6 +2364,20 @@
         "node": ">=8"
       }
     },
+    "node_modules/fraction.js": {
+      "version": "5.3.4",
+      "resolved": "https://registry.npmjs.org/fraction.js/-/fraction.js-5.3.4.tgz",
+      "integrity": "sha512-1X1NTtiJphryn/uLQz3whtY6jK3fTqoE3ohKs0tT+Ujr1W59oopxmoEh7Lu5p6vBaPbgoM0bzveAW4Qi5RyWDQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "*"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/rawify"
+      }
+    },
     "node_modules/fs-readdir-recursive": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/fs-readdir-recursive/-/fs-readdir-recursive-1.1.0.tgz",
@@ -2454,9 +2527,9 @@
       }
     },
     "node_modules/hashery": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/hashery/-/hashery-1.2.0.tgz",
-      "integrity": "sha512-43XJKpwle72Ik5Zpam7MuzRWyNdwwdf6XHlh8wCj2PggvWf+v/Dm5B0dxGZOmddidgeO6Ofu9As/o231Ti/9PA==",
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/hashery/-/hashery-1.3.0.tgz",
+      "integrity": "sha512-fWltioiy5zsSAs9ouEnvhsVJeAXRybGCNNv0lvzpzNOSDbULXRy7ivFWwCCv4I5Am6kSo75hmbsCduOoc2/K4w==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -2674,6 +2747,13 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/javascript-natural-sort": {
+      "version": "0.7.1",
+      "resolved": "https://registry.npmjs.org/javascript-natural-sort/-/javascript-natural-sort-0.7.1.tgz",
+      "integrity": "sha512-nO6jcEfZWQXDhOiBtG2KvKyEptz7RVbpGP4vTD2hLBdmNQSsCiicO2Ioinv6UI4y9ukqnBpy+XZ9H6uLNgJTlw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/js-stringify": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/js-stringify/-/js-stringify-1.0.2.tgz",
@@ -3067,6 +3147,30 @@
         "node": ">=6"
       }
     },
+    "node_modules/mathjs": {
+      "version": "15.0.0",
+      "resolved": "https://registry.npmjs.org/mathjs/-/mathjs-15.0.0.tgz",
+      "integrity": "sha512-eXXXRKEl/htny5T/Ce/hbmqa8WZi2RmaCEHBOVtTeYcYyyGvz1UYSdK2ypydDepFF6F7ue0OygXRRIx8lLq/uw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@babel/runtime": "^7.26.10",
+        "complex.js": "^2.2.5",
+        "decimal.js": "^10.4.3",
+        "escape-latex": "^1.2.0",
+        "fraction.js": "^5.2.1",
+        "javascript-natural-sort": "^0.7.1",
+        "seedrandom": "^3.0.5",
+        "tiny-emitter": "^2.1.0",
+        "typed-function": "^4.2.1"
+      },
+      "bin": {
+        "mathjs": "bin/cli.js"
+      },
+      "engines": {
+        "node": ">= 18"
+      }
+    },
     "node_modules/mathml-tag-names": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/mathml-tag-names/-/mathml-tag-names-2.1.3.tgz",
@@ -3428,9 +3532,9 @@
       }
     },
     "node_modules/postcss-selector-parser": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/postcss-selector-parser/-/postcss-selector-parser-7.1.0.tgz",
-      "integrity": "sha512-8sLjZwK0R+JlxlYcTuVnyT2v+htpdrjDOKuMcOVdYjt52Lh8hWRYpxBPoKx/Zg+bcjc3wx6fmQevMmUztS/ccA==",
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/postcss-selector-parser/-/postcss-selector-parser-7.1.1.tgz",
+      "integrity": "sha512-orRsuYpJVw8LdAwqqLykBj9ecS5/cRHlI5+nvTo8LcCKmzDmqVORXtOIYEEQuL9D4BxtA1lm5isAqzQZCoQ6Eg==",
       "dev": true,
       "license": "MIT",
       "peer": true,
@@ -3450,9 +3554,9 @@
       "license": "MIT"
     },
     "node_modules/prettier": {
-      "version": "3.6.2",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.6.2.tgz",
-      "integrity": "sha512-I7AIg5boAr5R0FFtJ6rCfD+LFsWHp81dolrFD8S79U9tb8Az2nGrJncnMSnys+bpQJfRUzqs9hnA81OAA3hCuQ==",
+      "version": "3.7.2",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.7.2.tgz",
+      "integrity": "sha512-n3HV2J6QhItCXndGa3oMWvWFAgN1ibnS7R9mt6iokScBOC0Ul9/iZORmU2IWUMcyAQaMPjTlY3uT34TqocUxMA==",
       "dev": true,
       "license": "MIT",
       "peer": true,
@@ -3704,6 +3808,13 @@
       ],
       "license": "BSD-3-Clause"
     },
+    "node_modules/seedrandom": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/seedrandom/-/seedrandom-3.0.5.tgz",
+      "integrity": "sha512-8OwmbklUNzwezjGInmZ+2clQmExQPvomqjL7LFqOYqtmuxRgQYqOD3mHaU+MvZn5FLUeVxVfQjwLZW/n/JFuqg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/semver": {
       "version": "5.7.2",
       "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.2.tgz",
@@ -3932,9 +4043,9 @@
       }
     },
     "node_modules/stylelint": {
-      "version": "16.26.0",
-      "resolved": "https://registry.npmjs.org/stylelint/-/stylelint-16.26.0.tgz",
-      "integrity": "sha512-Y/3AVBefrkqqapVYH3LBF5TSDZ1kw+0XpdKN2KchfuhMK6lQ85S4XOG4lIZLcrcS4PWBmvcY6eS2kCQFz0jukQ==",
+      "version": "16.26.1",
+      "resolved": "https://registry.npmjs.org/stylelint/-/stylelint-16.26.1.tgz",
+      "integrity": "sha512-v20V59/crfc8sVTAtge0mdafI3AdnzQ2KsWe6v523L4OA1bJO02S7MO2oyXDCS6iWb9ckIPnqAFVItqSBQr7jw==",
       "dev": true,
       "funding": [
         {
@@ -3950,6 +4061,7 @@
       "peer": true,
       "dependencies": {
         "@csstools/css-parser-algorithms": "^3.0.5",
+        "@csstools/css-syntax-patches-for-csstree": "^1.0.19",
         "@csstools/css-tokenizer": "^3.0.4",
         "@csstools/media-query-list-parser": "^4.0.3",
         "@csstools/selector-specificity": "^5.0.0",
@@ -3962,7 +4074,7 @@
         "debug": "^4.4.3",
         "fast-glob": "^3.3.3",
         "fastest-levenshtein": "^1.0.16",
-        "file-entry-cache": "^11.1.0",
+        "file-entry-cache": "^11.1.1",
         "global-modules": "^2.0.0",
         "globby": "^11.1.0",
         "globjoin": "^0.1.4",
@@ -4192,6 +4304,13 @@
         "node": ">=10.0.0"
       }
     },
+    "node_modules/tiny-emitter": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/tiny-emitter/-/tiny-emitter-2.1.0.tgz",
+      "integrity": "sha512-NB6Dk1A9xgQPMoGqC5CVXn123gWyte215ONT5Pp5a0yt4nlEoO1ZWeCwpncaekPHXO60i47ihFnZPiRPjRMq4Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/tinyglobby": {
       "version": "0.2.15",
       "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.15.tgz",
@@ -4268,6 +4387,16 @@
       "dev": true,
       "license": "0BSD"
     },
+    "node_modules/typed-function": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmjs.org/typed-function/-/typed-function-4.2.2.tgz",
+      "integrity": "sha512-VwaXim9Gp1bngi/q3do8hgttYn2uC3MoT/gfuMWylnj1IeZBUAyPddHZlo1K05BDoj8DYPpMdiHqH1dDYdJf2A==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">= 18"
+      }
+    },
     "node_modules/typescript": {
       "version": "5.9.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",