diff --git a/doc/myst.yml b/doc/myst.yml
index 8dc714f233..b1dd776b27 100644
--- a/doc/myst.yml
+++ b/doc/myst.yml
@@ -36,6 +36,7 @@ project:
         - "http://api.openai.com"
         - "http://api.openai.com/**"
         - "https://cognitiveservices.azure.com/**"
+        - "https://www.youtube.com/watch?v=jq9DcEL3cHE"
   toc:
     - file: index.md
     - file: getting_started/README.md
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 5fbde450f1..c0d14db08d 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -18,7 +18,7 @@
         "react-error-boundary": "6.1.2"
       },
       "devDependencies": {
-        "@eslint/js": "9.39.1",
+        "@eslint/js": "10.0.1",
         "@playwright/test": "1.60.0",
         "@testing-library/dom": "^10.4.1",
         "@testing-library/jest-dom": "6.9.1",
@@ -31,7 +31,7 @@
         "@typescript-eslint/eslint-plugin": "8.60.0",
         "@typescript-eslint/parser": "8.60.0",
         "@vitejs/plugin-react": "4.7.0",
-        "eslint": "9.39.1",
+        "eslint": "10.4.1",
         "eslint-plugin-react-hooks": "5.2.0",
         "eslint-plugin-react-refresh": "0.5.2",
         "globals": "15.15.0",
@@ -1154,176 +1154,89 @@
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+      "version": "0.23.5",
+      "resolved": "https://registry.npmjs.org/@eslint/config-array/-/config-array-0.23.5.tgz",
+      "integrity": "sha512-Y3kKLvC1dvTOT+oGlqNQ1XLqK6D1HU2YXPc52NmAlJZbMMWDzGYXMiPRJ8TYD39muD/OTjlZmNJ4ib7dvSrMBA==",
       "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
-        "@eslint/object-schema": "^2.1.7",
+        "@eslint/object-schema": "^3.0.5",
         "debug": "^4.3.1",
-        "minimatch": "^3.1.2"
+        "minimatch": "^10.2.4"
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-    },
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-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.13.tgz",
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-      "license": "ISC",
-      "dependencies": {
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+        "node": "^20.19.0 || ^22.13.0 || >=24"
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-      "resolved": "https://registry.npmjs.org/@eslint/config-helpers/-/config-helpers-0.4.2.tgz",
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+      "version": "0.6.0",
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+        "@eslint/core": "^1.2.1"
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+        "node": "^20.19.0 || ^22.13.0 || >=24"
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+        "node": "^20.19.0 || ^22.13.0 || >=24"
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         "url": "https://eslint.org/donate"
+      },
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+      },
+      "peerDependenciesMeta": {
+        "eslint": {
+          "optional": true
+        }
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       "dev": true,
       "license": "Apache-2.0",
       "engines": {
-        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
+        "node": "^20.19.0 || ^22.13.0 || >=24"
       }
     },
     "node_modules/@eslint/plugin-kit": {
-      "version": "0.4.1",
-      "resolved": "https://registry.npmjs.org/@eslint/plugin-kit/-/plugin-kit-0.4.1.tgz",
-      "integrity": "sha512-43/qtrDUokr7LJqoF2c3+RInu/t4zfrpYdoSDfYyhg52rwLV6TnOvdG4fXm7IkSB3wErkcmJS9iEhjVtOSEjjA==",
+      "version": "0.7.2",
+      "resolved": "https://registry.npmjs.org/@eslint/plugin-kit/-/plugin-kit-0.7.2.tgz",
+      "integrity": "sha512-+CNAzxglkrpNf/kKywqQfk74QjtceuOE7Qm+AF8miRvPF/wmmK5+OJOgVh3AVTT3RP2mH3+FOaxlE5v72owk0A==",
       "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
-        "@eslint/core": "^0.17.0",
+        "@eslint/core": "^1.2.1",
         "levn": "^0.4.1"
       },
       "engines": {
-        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
+        "node": "^20.19.0 || ^22.13.0 || >=24"
       }
     },
     "node_modules/@floating-ui/core": {
@@ -4077,6 +3990,13 @@
         "@babel/types": "^7.28.2"
       }
     },
+    "node_modules/@types/esrecurse": {
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/@types/esrecurse/-/esrecurse-4.3.1.tgz",
+      "integrity": "sha512-xJBAbDifo5hpffDBuHl0Y8ywswbiAp/Wi7Y/GtAgSlZyIABppyurxVueOPE8LUQOxdlgi6Zqce7uoEpqNTeiUw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/estree": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.8.tgz",
@@ -4279,7 +4199,7 @@
         "url": "https://opencollective.com/typescript-eslint"
       },
       "peerDependencies": {
-        "@typescript-eslint/parser": "8.60.0",
+        "@typescript-eslint/parser": "^8.60.0",
         "eslint": "^8.57.0 || ^9.0.0 || ^10.0.0",
         "typescript": ">=4.8.4 <6.1.0"
       }
@@ -4518,9 +4438,9 @@
       "license": "BSD-3-Clause"
     },
     "node_modules/acorn": {
-      "version": "8.15.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.15.0.tgz",
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+      "version": "8.16.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.16.0.tgz",
+      "integrity": "sha512-UVJyE9MttOsBQIDKw1skb9nAwQuR5wuGD3+82K6JgJlm/Y+KI92oNsMNGZCYdDsVtRHSak0pcV5Dno5+4jh9sw==",
       "dev": true,
       "license": "MIT",
       "bin": {
@@ -4577,9 +4497,9 @@
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-      "version": "6.14.0",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.14.0.tgz",
-      "integrity": "sha512-IWrosm/yrn43eiKqkfkHis7QioDleaXQHdDVPKg0FSwwd/DuvyX79TZnFOnYpB7dcsFAMmtFztZuXPDvSePkFw==",
+      "version": "6.15.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.15.0.tgz",
+      "integrity": "sha512-fgFx7Hfoq60ytK2c7DhnF8jIvzYgOMxfugjLOSMHjLIPgenqa7S7oaagATUq99mV6IYvN2tRmC0wnTYX6iPbMw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -4656,13 +4576,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/argparse": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
-      "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
-      "dev": true,
-      "license": "Python-2.0"
-    },
     "node_modules/aria-query": {
       "version": "5.3.0",
       "resolved": "https://registry.npmjs.org/aria-query/-/aria-query-5.3.0.tgz",
@@ -5563,33 +5476,30 @@
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-      "version": "9.39.1",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-9.39.1.tgz",
-      "integrity": "sha512-BhHmn2yNOFA9H9JmmIVKJmd288g9hrVRDkdoIgRCRuSySRUHH7r/DI6aAXW9T1WwUuY3DFgrcaqB+deURBLR5g==",
+      "version": "10.4.1",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-10.4.1.tgz",
+      "integrity": "sha512-AyIKhnOBuOAdueD7RB3xB+YeAWScb9jHsJBgH2Hcde8InP5JYhqrRR6iTMHyTEwgENK54Cp44e4v8BwNhsuHuw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.8.0",
-        "@eslint-community/regexpp": "^4.12.1",
-        "@eslint/config-array": "^0.21.1",
-        "@eslint/config-helpers": "^0.4.2",
-        "@eslint/core": "^0.17.0",
-        "@eslint/eslintrc": "^3.3.1",
-        "@eslint/js": "9.39.1",
-        "@eslint/plugin-kit": "^0.4.1",
+        "@eslint-community/regexpp": "^4.12.2",
+        "@eslint/config-array": "^0.23.5",
+        "@eslint/config-helpers": "^0.6.0",
+        "@eslint/core": "^1.2.1",
+        "@eslint/plugin-kit": "^0.7.2",
         "@humanfs/node": "^0.16.6",
         "@humanwhocodes/module-importer": "^1.0.1",
         "@humanwhocodes/retry": "^0.4.2",
         "@types/estree": "^1.0.6",
-        "ajv": "^6.12.4",
-        "chalk": "^4.0.0",
+        "ajv": "^6.14.0",
         "cross-spawn": "^7.0.6",
         "debug": "^4.3.2",
         "escape-string-regexp": "^4.0.0",
-        "eslint-scope": "^8.4.0",
-        "eslint-visitor-keys": "^4.2.1",
-        "espree": "^10.4.0",
-        "esquery": "^1.5.0",
+        "eslint-scope": "^9.1.2",
+        "eslint-visitor-keys": "^5.0.1",
+        "espree": "^11.2.0",
+        "esquery": "^1.7.0",
         "esutils": "^2.0.2",
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@@ -5599,8 +5509,7 @@
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         "json-stable-stringify-without-jsonify": "^1.0.1",
-        "lodash.merge": "^4.6.2",
-        "minimatch": "^3.1.2",
+        "minimatch": "^10.2.4",
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@@ -5608,7 +5517,7 @@
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-        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
+        "node": "^20.19.0 || ^22.13.0 || >=24"
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@@ -5646,17 +5555,19 @@
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+      "version": "9.1.2",
+      "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-9.1.2.tgz",
+      "integrity": "sha512-xS90H51cKw0jltxmvmHy2Iai1LIqrfbw57b79w/J7MfvDfkIkFZ+kj6zC3BjtUwh150HsSSdxXZcsuv72miDFQ==",
       "dev": true,
       "license": "BSD-2-Clause",
       "dependencies": {
+        "@types/esrecurse": "^4.3.1",
+        "@types/estree": "^1.0.8",
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-        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
+        "node": "^20.19.0 || ^22.13.0 || >=24"
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@@ -5675,25 +5586,14 @@
         "url": "https://opencollective.com/eslint"
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-      "version": "4.2.1",
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+      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-5.0.1.tgz",
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       "license": "Apache-2.0",
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-        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
+        "node": "^20.19.0 || ^22.13.0 || >=24"
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         "url": "https://opencollective.com/eslint"
@@ -5709,45 +5609,32 @@
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-    "node_modules/eslint/node_modules/minimatch": {
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-      "license": "ISC",
-      "dependencies": {
-        "brace-expansion": "^1.1.7"
-      },
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-      }
-    },
     "node_modules/espree": {
-      "version": "10.4.0",
-      "resolved": "https://registry.npmjs.org/espree/-/espree-10.4.0.tgz",
-      "integrity": "sha512-j6PAQ2uUr79PZhBjP5C5fhl8e39FmRnOjsD5lGnWrFU8i2G776tBK7+nP8KuQUTTyAZUwfQqXAgrVH5MbH9CYQ==",
+      "version": "11.2.0",
+      "resolved": "https://registry.npmjs.org/espree/-/espree-11.2.0.tgz",
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       "dev": true,
       "license": "BSD-2-Clause",
       "dependencies": {
-        "acorn": "^8.15.0",
+        "acorn": "^8.16.0",
         "acorn-jsx": "^5.3.2",
-        "eslint-visitor-keys": "^4.2.1"
+        "eslint-visitor-keys": "^5.0.1"
       },
       "engines": {
-        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
+        "node": "^20.19.0 || ^22.13.0 || >=24"
       },
       "funding": {
         "url": "https://opencollective.com/eslint"
       }
     },
     "node_modules/espree/node_modules/eslint-visitor-keys": {
-      "version": "4.2.1",
-      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-4.2.1.tgz",
-      "integrity": "sha512-Uhdk5sfqcee/9H/rCOJikYz67o0a2Tw2hGRPOG2Y1R2dg7brRe1uG0yaNQDHu+TO/uQPF/5eCapvYSmHUjt7JQ==",
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-5.0.1.tgz",
+      "integrity": "sha512-tD40eHxA35h0PEIZNeIjkHoDR4YjjJp34biM0mDvplBe//mB+IHCqHDGV7pxF+7MklTvighcCPPZC7ynWyjdTA==",
       "dev": true,
       "license": "Apache-2.0",
       "engines": {
-        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
+        "node": "^20.19.0 || ^22.13.0 || >=24"
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         "url": "https://opencollective.com/eslint"
@@ -5768,9 +5655,9 @@
       }
     },
     "node_modules/esquery": {
-      "version": "1.6.0",
-      "resolved": "https://registry.npmjs.org/esquery/-/esquery-1.6.0.tgz",
-      "integrity": "sha512-ca9pw9fomFcKPvFLXhBKUK90ZvGibiGOvRJNbjljY7s7uq/5YO4BOzcYtJqExdx99rF6aAcnRxHmcUHcz6sQsg==",
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/esquery/-/esquery-1.7.0.tgz",
+      "integrity": "sha512-Ap6G0WQwcU/LHsvLwON1fAQX9Zp0A2Y6Y/cJBl9r/JbW90Zyg4/zbG6zzKa2OTALELarYHmKu0GhpM5EO+7T0g==",
       "dev": true,
       "license": "BSD-3-Clause",
       "dependencies": {
@@ -6368,23 +6255,6 @@
         "node": ">= 4"
       }
     },
-    "node_modules/import-fresh": {
-      "version": "3.3.1",
-      "resolved": "https://registry.npmjs.org/import-fresh/-/import-fresh-3.3.1.tgz",
-      "integrity": "sha512-TR3KfrTZTYLPB6jUjfx6MF9WcWrHL9su5TObK4ZkYgBdWKPOFoSoQIdEuTuR82pmtxH2spWG9h6etwfr1pLBqQ==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "parent-module": "^1.0.0",
-        "resolve-from": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=6"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
     "node_modules/import-local": {
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/import-local/-/import-local-3.2.0.tgz",
@@ -7550,19 +7420,6 @@
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       "license": "MIT"
     },
-    "node_modules/js-yaml": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.1.1.tgz",
-      "integrity": "sha512-qQKT4zQxXl8lLwBtHMWwaTcGfFOZviOJet3Oy/xmGk2gZH677CJM9EvtfdSkgWcATZhj/55JZ0rmy3myCT5lsA==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "argparse": "^2.0.1"
-      },
-      "bin": {
-        "js-yaml": "bin/js-yaml.js"
-      }
-    },
     "node_modules/jsdom": {
       "version": "20.0.3",
       "resolved": "https://registry.npmjs.org/jsdom/-/jsdom-20.0.3.tgz",
@@ -7743,13 +7600,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/lodash.merge": {
-      "version": "4.6.2",
-      "resolved": "https://registry.npmjs.org/lodash.merge/-/lodash.merge-4.6.2.tgz",
-      "integrity": "sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/loose-envify": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.4.0.tgz",
@@ -8081,19 +7931,6 @@
         "node": ">=6"
       }
     },
-    "node_modules/parent-module": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/parent-module/-/parent-module-1.0.1.tgz",
-      "integrity": "sha512-GQ2EWRpQV8/o+Aw8YqtfZZPfNRWZYkbidE9k5rpl/hC3vtHHBfGm2Ifi6qWV+coDGkrUKZAxE3Lot5kcsRlh+g==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "callsites": "^3.0.0"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/parse-json": {
       "version": "5.2.0",
       "resolved": "https://registry.npmjs.org/parse-json/-/parse-json-5.2.0.tgz",
@@ -8581,16 +8418,6 @@
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-    "node_modules/resolve-from": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
-      "integrity": "sha512-pb/MYmXstAkysRFx8piNI1tGFNQIFA3vkE3Gq4EuA1dF6gHp/+vgZqsCGJapvy8N3Q+4o7FwvquPJcnZ7RYy4g==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=4"
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       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/resolve.exports/-/resolve.exports-2.0.3.tgz",
diff --git a/frontend/package.json b/frontend/package.json
index c3eb13a768..de1e88f1c4 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -32,7 +32,7 @@
     "react-error-boundary": "6.1.2"
   },
   "devDependencies": {
-    "@eslint/js": "9.39.1",
+    "@eslint/js": "10.0.1",
     "@playwright/test": "1.60.0",
     "@testing-library/dom": "^10.4.1",
     "@testing-library/jest-dom": "6.9.1",
@@ -45,7 +45,7 @@
     "@typescript-eslint/eslint-plugin": "8.60.0",
     "@typescript-eslint/parser": "8.60.0",
     "@vitejs/plugin-react": "4.7.0",
-    "eslint": "9.39.1",
+    "eslint": "10.4.1",
     "eslint-plugin-react-hooks": "5.2.0",
     "eslint-plugin-react-refresh": "0.5.2",
     "globals": "15.15.0",
diff --git a/frontend/src/utils/messageMapper.ts b/frontend/src/utils/messageMapper.ts
index d4eed5781b..608b24f66d 100644
--- a/frontend/src/utils/messageMapper.ts
+++ b/frontend/src/utils/messageMapper.ts
@@ -243,7 +243,7 @@ export function backendMessagesToFrontend(messages: BackendMessage[]): Message[]
  * Convert a frontend MessageAttachment (with File) to a backend MessagePieceRequest.
  */
 export async function attachmentToMessagePieceRequest(att: MessageAttachment): Promise<MessagePieceRequest> {
-  let base64Value = ''
+  let base64Value: string
   if (att.file) {
     base64Value = await fileToBase64(att.file)
   } else if (att.url.startsWith('data:')) {