Add FE test framework

4 files changed, 627 insertions, 3 deletions

diff --git a/.gitignore b/.gitignore
index 11b7d6f..7a5c67e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@
 /pilcrow.db.backup
 /pilcrow.db.pre-commit
 /vite.config.js.*.mjs
+/coverage
diff --git a/package-lock.json b/package-lock.json
index 01b0cce..ebc307d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -20,6 +20,7 @@
 				"@sveltejs/vite-plugin-svelte": "^4.0.0",
 				"@tailwindcss/forms": "^0.5.9",
 				"@types/eslint": "^9.6.1",
+				"@vitest/coverage-v8": "^2.1.4",
 				"autoprefixer": "^10.4.20",
 				"eslint": "^9.14.0",
 				"eslint-config-prettier": "^9.1.0",
@@ -30,7 +31,8 @@
 				"prettier-plugin-svelte": "^3.2.7",
 				"svelte": "^5.1.9",
 				"tailwindcss": "^3.4.14",
-				"vite": "^5.4.10"
+				"vite": "^5.4.10",
+				"vitest": "^2.1.4"
 			},
 			"engines": {
 				"node": ">=22.0.0 <23.0.0",
@@ -64,6 +66,63 @@
 				"node": ">=6.0.0"
 			}
 		},
+		"node_modules/@babel/helper-string-parser": {
+			"version": "7.25.9",
+			"resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.25.9.tgz",
+			"integrity": "sha512-4A/SCr/2KLd5jrtOMFzaKjVtAei3+2r/NChoBNoZ3EyP/+GlhoaEGoWOZUmFmoITP7zOJyHIMm+DYRd8o3PvHA==",
+			"dev": true,
+			"license": "MIT",
+			"engines": {
+				"node": ">=6.9.0"
+			}
+		},
+		"node_modules/@babel/helper-validator-identifier": {
+			"version": "7.25.9",
+			"resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.25.9.tgz",
+			"integrity": "sha512-Ed61U6XJc3CVRfkERJWDz4dJwKe7iLmmJsbOGu9wSloNSFttHV0I8g6UAgb7qnK5ly5bGLPd4oXZlxCdANBOWQ==",
+			"dev": true,
+			"license": "MIT",
+			"engines": {
+				"node": ">=6.9.0"
+			}
+		},
+		"node_modules/@babel/parser": {
+			"version": "7.26.2",
+			"resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.26.2.tgz",
+			"integrity": "sha512-DWMCZH9WA4Maitz2q21SRKHo9QXZxkDsbNZoVD62gusNtNBBqDg9i7uOhASfTfIGNzW+O+r7+jAlM8dwphcJKQ==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@babel/types": "^7.26.0"
+			},
+			"bin": {
+				"parser": "bin/babel-parser.js"
+			},
+			"engines": {
+				"node": ">=6.0.0"
+			}
+		},
+		"node_modules/@babel/types": {
+			"version": "7.26.0",
+			"resolved": "https://registry.npmjs.org/@babel/types/-/types-7.26.0.tgz",
+			"integrity": "sha512-Z/yiTPj+lDVnF7lWeKCIJzaIkI0vYO87dMpZ4bg4TDrFe4XXLFWL1TbXU27gBP3QccxV9mZICCrnjnYlJjXHOA==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@babel/helper-string-parser": "^7.25.9",
+				"@babel/helper-validator-identifier": "^7.25.9"
+			},
+			"engines": {
+				"node": ">=6.9.0"
+			}
+		},
+		"node_modules/@bcoe/v8-coverage": {
+			"version": "0.2.3",
+			"resolved": "https://registry.npmjs.org/@bcoe/v8-coverage/-/v8-coverage-0.2.3.tgz",
+			"integrity": "sha512-0hYQ8SB4Db5zvZB4axdMHGwEaQjkZzFjQiN9LVYvIFB2nSUHW9tYpxWriPrWDASIxiaXax83REcLxuSdnGPZtw==",
+			"dev": true,
+			"license": "MIT"
+		},
 		"node_modules/@esbuild/darwin-arm64": {
 			"version": "0.21.5",
 			"resolved": "https://registry.npmjs.org/@esbuild/darwin-arm64/-/darwin-arm64-0.21.5.tgz",
@@ -333,6 +392,16 @@
 				"node": ">=12"
 			}
 		},
+		"node_modules/@istanbuljs/schema": {
+			"version": "0.1.3",
+			"resolved": "https://registry.npmjs.org/@istanbuljs/schema/-/schema-0.1.3.tgz",
+			"integrity": "sha512-ZXRY4jNvVgSVQ8DL3LTcakaAtXwTVUxE81hslsyD2AtoXW/wVob10HkOJ1X/pAlcI7D+2YoZKg5do8G/w6RYgA==",
+			"dev": true,
+			"license": "MIT",
+			"engines": {
+				"node": ">=8"
+			}
+		},
 		"node_modules/@jridgewell/gen-mapping": {
 			"version": "0.3.5",
 			"resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.5.tgz",
@@ -663,6 +732,152 @@
 			"dev": true,
 			"license": "MIT"
 		},
+		"node_modules/@vitest/coverage-v8": {
+			"version": "2.1.4",
+			"resolved": "https://registry.npmjs.org/@vitest/coverage-v8/-/coverage-v8-2.1.4.tgz",
+			"integrity": "sha512-FPKQuJfR6VTfcNMcGpqInmtJuVXFSCd9HQltYncfR01AzXhLucMEtQ5SinPdZxsT5x/5BK7I5qFJ5/ApGCmyTQ==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@ampproject/remapping": "^2.3.0",
+				"@bcoe/v8-coverage": "^0.2.3",
+				"debug": "^4.3.7",
+				"istanbul-lib-coverage": "^3.2.2",
+				"istanbul-lib-report": "^3.0.1",
+				"istanbul-lib-source-maps": "^5.0.6",
+				"istanbul-reports": "^3.1.7",
+				"magic-string": "^0.30.12",
+				"magicast": "^0.3.5",
+				"std-env": "^3.7.0",
+				"test-exclude": "^7.0.1",
+				"tinyrainbow": "^1.2.0"
+			},
+			"funding": {
+				"url": "https://opencollective.com/vitest"
+			},
+			"peerDependencies": {
+				"@vitest/browser": "2.1.4",
+				"vitest": "2.1.4"
+			},
+			"peerDependenciesMeta": {
+				"@vitest/browser": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@vitest/expect": {
+			"version": "2.1.4",
+			"resolved": "https://registry.npmjs.org/@vitest/expect/-/expect-2.1.4.tgz",
+			"integrity": "sha512-DOETT0Oh1avie/D/o2sgMHGrzYUFFo3zqESB2Hn70z6QB1HrS2IQ9z5DfyTqU8sg4Bpu13zZe9V4+UTNQlUeQA==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@vitest/spy": "2.1.4",
+				"@vitest/utils": "2.1.4",
+				"chai": "^5.1.2",
+				"tinyrainbow": "^1.2.0"
+			},
+			"funding": {
+				"url": "https://opencollective.com/vitest"
+			}
+		},
+		"node_modules/@vitest/mocker": {
+			"version": "2.1.4",
+			"resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-2.1.4.tgz",
+			"integrity": "sha512-Ky/O1Lc0QBbutJdW0rqLeFNbuLEyS+mIPiNdlVlp2/yhJ0SbyYqObS5IHdhferJud8MbbwMnexg4jordE5cCoQ==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@vitest/spy": "2.1.4",
+				"estree-walker": "^3.0.3",
+				"magic-string": "^0.30.12"
+			},
+			"funding": {
+				"url": "https://opencollective.com/vitest"
+			},
+			"peerDependencies": {
+				"msw": "^2.4.9",
+				"vite": "^5.0.0"
+			},
+			"peerDependenciesMeta": {
+				"msw": {
+					"optional": true
+				},
+				"vite": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@vitest/pretty-format": {
+			"version": "2.1.4",
+			"resolved": "https://registry.npmjs.org/@vitest/pretty-format/-/pretty-format-2.1.4.tgz",
+			"integrity": "sha512-L95zIAkEuTDbUX1IsjRl+vyBSLh3PwLLgKpghl37aCK9Jvw0iP+wKwIFhfjdUtA2myLgjrG6VU6JCFLv8q/3Ww==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"tinyrainbow": "^1.2.0"
+			},
+			"funding": {
+				"url": "https://opencollective.com/vitest"
+			}
+		},
+		"node_modules/@vitest/runner": {
+			"version": "2.1.4",
+			"resolved": "https://registry.npmjs.org/@vitest/runner/-/runner-2.1.4.tgz",
+			"integrity": "sha512-sKRautINI9XICAMl2bjxQM8VfCMTB0EbsBc/EDFA57V6UQevEKY/TOPOF5nzcvCALltiLfXWbq4MaAwWx/YxIA==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@vitest/utils": "2.1.4",
+				"pathe": "^1.1.2"
+			},
+			"funding": {
+				"url": "https://opencollective.com/vitest"
+			}
+		},
+		"node_modules/@vitest/snapshot": {
+			"version": "2.1.4",
+			"resolved": "https://registry.npmjs.org/@vitest/snapshot/-/snapshot-2.1.4.tgz",
+			"integrity": "sha512-3Kab14fn/5QZRog5BPj6Rs8dc4B+mim27XaKWFWHWA87R56AKjHTGcBFKpvZKDzC4u5Wd0w/qKsUIio3KzWW4Q==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@vitest/pretty-format": "2.1.4",
+				"magic-string": "^0.30.12",
+				"pathe": "^1.1.2"
+			},
+			"funding": {
+				"url": "https://opencollective.com/vitest"
+			}
+		},
+		"node_modules/@vitest/spy": {
+			"version": "2.1.4",
+			"resolved": "https://registry.npmjs.org/@vitest/spy/-/spy-2.1.4.tgz",
+			"integrity": "sha512-4JOxa+UAizJgpZfaCPKK2smq9d8mmjZVPMt2kOsg/R8QkoRzydHH1qHxIYNvr1zlEaFj4SXiaaJWxq/LPLKaLg==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"tinyspy": "^3.0.2"
+			},
+			"funding": {
+				"url": "https://opencollective.com/vitest"
+			}
+		},
+		"node_modules/@vitest/utils": {
+			"version": "2.1.4",
+			"resolved": "https://registry.npmjs.org/@vitest/utils/-/utils-2.1.4.tgz",
+			"integrity": "sha512-MXDnZn0Awl2S86PSNIim5PWXgIAx8CIkzu35mBdSApUip6RFOGXBCf3YFyeEu8n1IHk4bWD46DeYFu9mQlFIRg==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@vitest/pretty-format": "2.1.4",
+				"loupe": "^3.1.2",
+				"tinyrainbow": "^1.2.0"
+			},
+			"funding": {
+				"url": "https://opencollective.com/vitest"
+			}
+		},
 		"node_modules/acorn": {
 			"version": "8.14.0",
 			"resolved": "https://registry.npmjs.org/acorn/-/acorn-8.14.0.tgz",
@@ -787,6 +1002,16 @@
 				"node": ">= 0.4"
 			}
 		},
+		"node_modules/assertion-error": {
+			"version": "2.0.1",
+			"resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-2.0.1.tgz",
+			"integrity": "sha512-Izi8RQcffqCeNVgFigKli1ssklIbpHnCYc6AknXGYoB6grJqyeby7jv12JUQgmTAnIDnbck1uxksT4dzN3PWBA==",
+			"dev": true,
+			"license": "MIT",
+			"engines": {
+				"node": ">=12"
+			}
+		},
 		"node_modules/asynckit": {
 			"version": "0.4.0",
 			"resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
@@ -929,6 +1154,16 @@
 				"node": "^6 || ^7 || ^8 || ^9 || ^10 || ^11 || ^12 || >=13.7"
 			}
 		},
+		"node_modules/cac": {
+			"version": "6.7.14",
+			"resolved": "https://registry.npmjs.org/cac/-/cac-6.7.14.tgz",
+			"integrity": "sha512-b6Ilus+c3RrdDk+JhLKUAQfzzgLEPy6wcXqS7f/xe1EETvsDP6GORG7SFuOs6cID5YkqchW/LXZbX5bc8j7ZcQ==",
+			"dev": true,
+			"license": "MIT",
+			"engines": {
+				"node": ">=8"
+			}
+		},
 		"node_modules/callsites": {
 			"version": "3.1.0",
 			"resolved": "https://registry.npmjs.org/callsites/-/callsites-3.1.0.tgz",
@@ -970,6 +1205,23 @@
 			],
 			"license": "CC-BY-4.0"
 		},
+		"node_modules/chai": {
+			"version": "5.1.2",
+			"resolved": "https://registry.npmjs.org/chai/-/chai-5.1.2.tgz",
+			"integrity": "sha512-aGtmf24DW6MLHHG5gCx4zaI3uBq3KRtxeVs0DjFH6Z0rDNbsvTxFASFvdj79pxjxZ8/5u3PIiN3IwEIQkiiuPw==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"assertion-error": "^2.0.1",
+				"check-error": "^2.1.1",
+				"deep-eql": "^5.0.1",
+				"loupe": "^3.1.0",
+				"pathval": "^2.0.0"
+			},
+			"engines": {
+				"node": ">=12"
+			}
+		},
 		"node_modules/chalk": {
 			"version": "4.1.2",
 			"resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
@@ -987,6 +1239,16 @@
 				"url": "https://github.com/chalk/chalk?sponsor=1"
 			}
 		},
+		"node_modules/check-error": {
+			"version": "2.1.1",
+			"resolved": "https://registry.npmjs.org/check-error/-/check-error-2.1.1.tgz",
+			"integrity": "sha512-OAlb+T7V4Op9OwdkjmguYRqncdlx5JiofwOAUkmTF+jNdHwzTaTs4sRAGpzLF3oOz5xAyDGrPgeIDFQmDOTiJw==",
+			"dev": true,
+			"license": "MIT",
+			"engines": {
+				"node": ">= 16"
+			}
+		},
 		"node_modules/chokidar": {
 			"version": "3.6.0",
 			"resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.6.0.tgz",
@@ -1130,6 +1392,16 @@
 				}
 			}
 		},
+		"node_modules/deep-eql": {
+			"version": "5.0.2",
+			"resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-5.0.2.tgz",
+			"integrity": "sha512-h5k/5U50IJJFpzfL6nO9jaaumfjO/f2NjK/oYB2Djzm4p9L+3T9qWpZqZ2hAbLPuuYq9wrU08WQyBTL5GbPk5Q==",
+			"dev": true,
+			"license": "MIT",
+			"engines": {
+				"node": ">=6"
+			}
+		},
 		"node_modules/deep-is": {
 			"version": "0.1.4",
 			"resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.4.tgz",
@@ -1493,6 +1765,16 @@
 				"node": ">=4.0"
 			}
 		},
+		"node_modules/estree-walker": {
+			"version": "3.0.3",
+			"resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-3.0.3.tgz",
+			"integrity": "sha512-7RUKfXgSMMkzt6ZuXmqapOurLGPPfgj6l9uRZ7lRGolvk0y2yocc35LdcxKC5PQZdn2DMqioAQ2NoWcrTKmm6g==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@types/estree": "^1.0.0"
+			}
+		},
 		"node_modules/esutils": {
 			"version": "2.0.3",
 			"resolved": "https://registry.npmjs.org/esutils/-/esutils-2.0.3.tgz",
@@ -1503,6 +1785,16 @@
 				"node": ">=0.10.0"
 			}
 		},
+		"node_modules/expect-type": {
+			"version": "1.1.0",
+			"resolved": "https://registry.npmjs.org/expect-type/-/expect-type-1.1.0.tgz",
+			"integrity": "sha512-bFi65yM+xZgk+u/KRIpekdSYkTB5W1pEf0Lt8Q8Msh7b+eQ7LXVtIB1Bkm4fvclDEL1b2CZkMhv2mOeF8tMdkA==",
+			"dev": true,
+			"license": "Apache-2.0",
+			"engines": {
+				"node": ">=12.0.0"
+			}
+		},
 		"node_modules/fast-deep-equal": {
 			"version": "3.1.3",
 			"resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
@@ -1828,6 +2120,13 @@
 				"node": ">= 0.4"
 			}
 		},
+		"node_modules/html-escaper": {
+			"version": "2.0.2",
+			"resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-2.0.2.tgz",
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+			"dev": true,
+			"license": "MIT"
+		},
 		"node_modules/ignore": {
 			"version": "5.3.2",
 			"resolved": "https://registry.npmjs.org/ignore/-/ignore-5.3.2.tgz",
@@ -1965,6 +2264,60 @@
 			"dev": true,
 			"license": "ISC"
 		},
+		"node_modules/istanbul-lib-coverage": {
+			"version": "3.2.2",
+			"resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-3.2.2.tgz",
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+			"dev": true,
+			"license": "BSD-3-Clause",
+			"engines": {
+				"node": ">=8"
+			}
+		},
+		"node_modules/istanbul-lib-report": {
+			"version": "3.0.1",
+			"resolved": "https://registry.npmjs.org/istanbul-lib-report/-/istanbul-lib-report-3.0.1.tgz",
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+			"dev": true,
+			"license": "BSD-3-Clause",
+			"dependencies": {
+				"istanbul-lib-coverage": "^3.0.0",
+				"make-dir": "^4.0.0",
+				"supports-color": "^7.1.0"
+			},
+			"engines": {
+				"node": ">=10"
+			}
+		},
+		"node_modules/istanbul-lib-source-maps": {
+			"version": "5.0.6",
+			"resolved": "https://registry.npmjs.org/istanbul-lib-source-maps/-/istanbul-lib-source-maps-5.0.6.tgz",
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+			"dev": true,
+			"license": "BSD-3-Clause",
+			"dependencies": {
+				"@jridgewell/trace-mapping": "^0.3.23",
+				"debug": "^4.1.1",
+				"istanbul-lib-coverage": "^3.0.0"
+			},
+			"engines": {
+				"node": ">=10"
+			}
+		},
+		"node_modules/istanbul-reports": {
+			"version": "3.1.7",
+			"resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.1.7.tgz",
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+			"dev": true,
+			"license": "BSD-3-Clause",
+			"dependencies": {
+				"html-escaper": "^2.0.0",
+				"istanbul-lib-report": "^3.0.0"
+			},
+			"engines": {
+				"node": ">=8"
+			}
+		},
 		"node_modules/jackspeak": {
 			"version": "3.4.3",
 			"resolved": "https://registry.npmjs.org/jackspeak/-/jackspeak-3.4.3.tgz",
@@ -2113,6 +2466,13 @@
 			"dev": true,
 			"license": "MIT"
 		},
+		"node_modules/loupe": {
+			"version": "3.1.2",
+			"resolved": "https://registry.npmjs.org/loupe/-/loupe-3.1.2.tgz",
+			"integrity": "sha512-23I4pFZHmAemUnz8WZXbYRSKYj801VDaNv9ETuMh7IrMc7VuVVSo+Z9iLE3ni30+U48iDWfi30d3twAXBYmnCg==",
+			"dev": true,
+			"license": "MIT"
+		},
 		"node_modules/lru-cache": {
 			"version": "10.4.3",
 			"resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-10.4.3.tgz",
@@ -2130,6 +2490,34 @@
 				"@jridgewell/sourcemap-codec": "^1.5.0"
 			}
 		},
+		"node_modules/magicast": {
+			"version": "0.3.5",
+			"resolved": "https://registry.npmjs.org/magicast/-/magicast-0.3.5.tgz",
+			"integrity": "sha512-L0WhttDl+2BOsybvEOLK7fW3UA0OQ0IQ2d6Zl2x/a6vVRs3bAY0ECOSHHeL5jD+SbOpOCUEi0y1DgHEn9Qn1AQ==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@babel/parser": "^7.25.4",
+				"@babel/types": "^7.25.4",
+				"source-map-js": "^1.2.0"
+			}
+		},
+		"node_modules/make-dir": {
+			"version": "4.0.0",
+			"resolved": "https://registry.npmjs.org/make-dir/-/make-dir-4.0.0.tgz",
+			"integrity": "sha512-hXdUTZYIVOt1Ex//jAQi+wTZZpUpwBj/0QsOzqegb3rGMMeJiSEu5xLHnYfBrRV4RH2+OCSOO95Is/7x1WJ4bw==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"semver": "^7.5.3"
+			},
+			"engines": {
+				"node": ">=10"
+			},
+			"funding": {
+				"url": "https://github.com/sponsors/sindresorhus"
+			}
+		},
 		"node_modules/marked": {
 			"version": "14.1.3",
 			"resolved": "https://registry.npmjs.org/marked/-/marked-14.1.3.tgz",
@@ -2446,6 +2834,23 @@
 				"url": "https://github.com/sponsors/isaacs"
 			}
 		},
+		"node_modules/pathe": {
+			"version": "1.1.2",
+			"resolved": "https://registry.npmjs.org/pathe/-/pathe-1.1.2.tgz",
+			"integrity": "sha512-whLdWMYL2TwI08hn8/ZqAbrVemu0LNaNNJZX73O6qaIdCTfXutsLhMkjdENX0qhsQ9uIimo4/aQOmXkoon2nDQ==",
+			"dev": true,
+			"license": "MIT"
+		},
+		"node_modules/pathval": {
+			"version": "2.0.0",
+			"resolved": "https://registry.npmjs.org/pathval/-/pathval-2.0.0.tgz",
+			"integrity": "sha512-vE7JKRyES09KiunauX7nd2Q9/L7lhok4smP9RZTDeD4MVs72Dp2qNFVz39Nz5a0FVEW0BJR6C0DYrq6unoziZA==",
+			"dev": true,
+			"license": "MIT",
+			"engines": {
+				"node": ">= 14.16"
+			}
+		},
 		"node_modules/picocolors": {
 			"version": "1.1.1",
 			"resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
@@ -2926,6 +3331,13 @@
 				"node": ">=8"
 			}
 		},
+		"node_modules/siginfo": {
+			"version": "2.0.0",
+			"resolved": "https://registry.npmjs.org/siginfo/-/siginfo-2.0.0.tgz",
+			"integrity": "sha512-ybx0WO1/8bSBLEWXZvEd7gMW3Sn3JFlW3TvX1nREbDLRNQNaeNN8WK0meBwPdAaOI7TtRRRJn/Es1zhrrCHu7g==",
+			"dev": true,
+			"license": "ISC"
+		},
 		"node_modules/signal-exit": {
 			"version": "4.1.0",
 			"resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-4.1.0.tgz",
@@ -2964,6 +3376,20 @@
 				"node": ">=0.10.0"
 			}
 		},
+		"node_modules/stackback": {
+			"version": "0.0.2",
+			"resolved": "https://registry.npmjs.org/stackback/-/stackback-0.0.2.tgz",
+			"integrity": "sha512-1XMJE5fQo1jGH6Y/7ebnwPOBEkIEnT4QF32d5R1+VXdXveM0IBMJt8zfaxX1P3QhVwrYe+576+jkANtSS2mBbw==",
+			"dev": true,
+			"license": "MIT"
+		},
+		"node_modules/std-env": {
+			"version": "3.8.0",
+			"resolved": "https://registry.npmjs.org/std-env/-/std-env-3.8.0.tgz",
+			"integrity": "sha512-Bc3YwwCB+OzldMxOXJIIvC6cPRWr/LxOp48CdQTOkPyk/t4JWWJbrilwBd7RJzKV8QW7tJkcgAmeuLLJugl5/w==",
+			"dev": true,
+			"license": "MIT"
+		},
 		"node_modules/string-width": {
 			"version": "5.1.2",
 			"resolved": "https://registry.npmjs.org/string-width/-/string-width-5.1.2.tgz",
@@ -3331,6 +3757,47 @@
 				"node": ">= 14"
 			}
 		},
+		"node_modules/test-exclude": {
+			"version": "7.0.1",
+			"resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-7.0.1.tgz",
+			"integrity": "sha512-pFYqmTw68LXVjeWJMST4+borgQP2AyMNbg1BpZh9LbyhUeNkeaPF9gzfPGUAnSMV3qPYdWUwDIjjCLiSDOl7vg==",
+			"dev": true,
+			"license": "ISC",
+			"dependencies": {
+				"@istanbuljs/schema": "^0.1.2",
+				"glob": "^10.4.1",
+				"minimatch": "^9.0.4"
+			},
+			"engines": {
+				"node": ">=18"
+			}
+		},
+		"node_modules/test-exclude/node_modules/brace-expansion": {
+			"version": "2.0.1",
+			"resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
+			"integrity": "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"balanced-match": "^1.0.0"
+			}
+		},
+		"node_modules/test-exclude/node_modules/minimatch": {
+			"version": "9.0.5",
+			"resolved": "https://registry.npmjs.org/minimatch/-/minimatch-9.0.5.tgz",
+			"integrity": "sha512-G6T0ZX48xgozx7587koeX9Ys2NYy6Gmv//P89sEte9V9whIapMNF4idKxnW2QtCcLiTWlb/wfCabAtAFWhhBow==",
+			"dev": true,
+			"license": "ISC",
+			"dependencies": {
+				"brace-expansion": "^2.0.1"
+			},
+			"engines": {
+				"node": ">=16 || 14 >=14.17"
+			},
+			"funding": {
+				"url": "https://github.com/sponsors/isaacs"
+			}
+		},
 		"node_modules/text-table": {
 			"version": "0.2.0",
 			"resolved": "https://registry.npmjs.org/text-table/-/text-table-0.2.0.tgz",
@@ -3372,6 +3839,50 @@
 				"globrex": "^0.1.2"
 			}
 		},
+		"node_modules/tinybench": {
+			"version": "2.9.0",
+			"resolved": "https://registry.npmjs.org/tinybench/-/tinybench-2.9.0.tgz",
+			"integrity": "sha512-0+DUvqWMValLmha6lr4kD8iAMK1HzV0/aKnCtWb9v9641TnP/MFb7Pc2bxoxQjTXAErryXVgUOfv2YqNllqGeg==",
+			"dev": true,
+			"license": "MIT"
+		},
+		"node_modules/tinyexec": {
+			"version": "0.3.1",
+			"resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-0.3.1.tgz",
+			"integrity": "sha512-WiCJLEECkO18gwqIp6+hJg0//p23HXp4S+gGtAKu3mI2F2/sXC4FvHvXvB0zJVVaTPhx1/tOwdbRsa1sOBIKqQ==",
+			"dev": true,
+			"license": "MIT"
+		},
+		"node_modules/tinypool": {
+			"version": "1.0.1",
+			"resolved": "https://registry.npmjs.org/tinypool/-/tinypool-1.0.1.tgz",
+			"integrity": "sha512-URZYihUbRPcGv95En+sz6MfghfIc2OJ1sv/RmhWZLouPY0/8Vo80viwPvg3dlaS9fuq7fQMEfgRRK7BBZThBEA==",
+			"dev": true,
+			"license": "MIT",
+			"engines": {
+				"node": "^18.0.0 || >=20.0.0"
+			}
+		},
+		"node_modules/tinyrainbow": {
+			"version": "1.2.0",
+			"resolved": "https://registry.npmjs.org/tinyrainbow/-/tinyrainbow-1.2.0.tgz",
+			"integrity": "sha512-weEDEq7Z5eTHPDh4xjX789+fHfF+P8boiFB+0vbWzpbnbsEr/GRaohi/uMKxg8RZMXnl1ItAi/IUHWMsjDV7kQ==",
+			"dev": true,
+			"license": "MIT",
+			"engines": {
+				"node": ">=14.0.0"
+			}
+		},
+		"node_modules/tinyspy": {
+			"version": "3.0.2",
+			"resolved": "https://registry.npmjs.org/tinyspy/-/tinyspy-3.0.2.tgz",
+			"integrity": "sha512-n1cw8k1k0x4pgA2+9XrOkFydTerNcJ1zWCO5Nn9scWHTD+5tp8dghT2x1uduQePZTZgd3Tupf+x9BxJjeJi77Q==",
+			"dev": true,
+			"license": "MIT",
+			"engines": {
+				"node": ">=14.0.0"
+			}
+		},
 		"node_modules/to-regex-range": {
 			"version": "5.0.1",
 			"resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
@@ -3523,6 +4034,28 @@
 				}
 			}
 		},
+		"node_modules/vite-node": {
+			"version": "2.1.4",
+			"resolved": "https://registry.npmjs.org/vite-node/-/vite-node-2.1.4.tgz",
+			"integrity": "sha512-kqa9v+oi4HwkG6g8ufRnb5AeplcRw8jUF6/7/Qz1qRQOXHImG8YnLbB+LLszENwFnoBl9xIf9nVdCFzNd7GQEg==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"cac": "^6.7.14",
+				"debug": "^4.3.7",
+				"pathe": "^1.1.2",
+				"vite": "^5.0.0"
+			},
+			"bin": {
+				"vite-node": "vite-node.mjs"
+			},
+			"engines": {
+				"node": "^18.0.0 || >=20.0.0"
+			},
+			"funding": {
+				"url": "https://opencollective.com/vitest"
+			}
+		},
 		"node_modules/vitefu": {
 			"version": "1.0.3",
 			"resolved": "https://registry.npmjs.org/vitefu/-/vitefu-1.0.3.tgz",
@@ -3542,6 +4075,72 @@
 				}
 			}
 		},
+		"node_modules/vitest": {
+			"version": "2.1.4",
+			"resolved": "https://registry.npmjs.org/vitest/-/vitest-2.1.4.tgz",
+			"integrity": "sha512-eDjxbVAJw1UJJCHr5xr/xM86Zx+YxIEXGAR+bmnEID7z9qWfoxpHw0zdobz+TQAFOLT+nEXz3+gx6nUJ7RgmlQ==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@vitest/expect": "2.1.4",
+				"@vitest/mocker": "2.1.4",
+				"@vitest/pretty-format": "^2.1.4",
+				"@vitest/runner": "2.1.4",
+				"@vitest/snapshot": "2.1.4",
+				"@vitest/spy": "2.1.4",
+				"@vitest/utils": "2.1.4",
+				"chai": "^5.1.2",
+				"debug": "^4.3.7",
+				"expect-type": "^1.1.0",
+				"magic-string": "^0.30.12",
+				"pathe": "^1.1.2",
+				"std-env": "^3.7.0",
+				"tinybench": "^2.9.0",
+				"tinyexec": "^0.3.1",
+				"tinypool": "^1.0.1",
+				"tinyrainbow": "^1.2.0",
+				"vite": "^5.0.0",
+				"vite-node": "2.1.4",
+				"why-is-node-running": "^2.3.0"
+			},
+			"bin": {
+				"vitest": "vitest.mjs"
+			},
+			"engines": {
+				"node": "^18.0.0 || >=20.0.0"
+			},
+			"funding": {
+				"url": "https://opencollective.com/vitest"
+			},
+			"peerDependencies": {
+				"@edge-runtime/vm": "*",
+				"@types/node": "^18.0.0 || >=20.0.0",
+				"@vitest/browser": "2.1.4",
+				"@vitest/ui": "2.1.4",
+				"happy-dom": "*",
+				"jsdom": "*"
+			},
+			"peerDependenciesMeta": {
+				"@edge-runtime/vm": {
+					"optional": true
+				},
+				"@types/node": {
+					"optional": true
+				},
+				"@vitest/browser": {
+					"optional": true
+				},
+				"@vitest/ui": {
+					"optional": true
+				},
+				"happy-dom": {
+					"optional": true
+				},
+				"jsdom": {
+					"optional": true
+				}
+			}
+		},
 		"node_modules/which": {
 			"version": "2.0.2",
 			"resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -3558,6 +4157,23 @@
 				"node": ">= 8"
 			}
 		},
+		"node_modules/why-is-node-running": {
+			"version": "2.3.0",
+			"resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+			"integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"siginfo": "^2.0.0",
+				"stackback": "0.0.2"
+			},
+			"bin": {
+				"why-is-node-running": "cli.js"
+			},
+			"engines": {
+				"node": ">=8"
+			}
+		},
 		"node_modules/word-wrap": {
 			"version": "1.2.5",
 			"resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
diff --git a/package.json b/package.json
index c51974c..7e36802 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,9 @@
 		"build": "vite build",
 		"preview": "vite preview",
 		"lint": "prettier --check ui && eslint ui",
-		"format": "prettier --write ui"
+		"format": "prettier --write ui",
+		"test": "vitest",
+		"coverage": "vitest run --coverage"
 	},
 	"devDependencies": {
 		"@skeletonlabs/skeleton": "^2.10.3",
@@ -21,6 +23,7 @@
 		"@sveltejs/vite-plugin-svelte": "^4.0.0",
 		"@tailwindcss/forms": "^0.5.9",
 		"@types/eslint": "^9.6.1",
+		"@vitest/coverage-v8": "^2.1.4",
 		"autoprefixer": "^10.4.20",
 		"eslint": "^9.14.0",
 		"eslint-config-prettier": "^9.1.0",
@@ -31,7 +34,8 @@
 		"prettier-plugin-svelte": "^3.2.7",
 		"svelte": "^5.1.9",
 		"tailwindcss": "^3.4.14",
-		"vite": "^5.4.10"
+		"vite": "^5.4.10",
+		"vitest": "^2.1.4"
 	},
 	"type": "module",
 	"dependencies": {
diff --git a/vite.config.js b/vite.config.js
index 863d652..61ba597 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -3,6 +3,9 @@ import { defineConfig } from 'vite';
 
 export default defineConfig({
   plugins: [sveltekit()],
+  // Tell Vitest to use the `browser` entry points in `package.json` files,
+  // even though it's running in Node
+	resolve: process.env.VITEST ? { conditions: ['browser'] } : undefined,
   server: {
     fs: {
       allow: [