chore: upgrade ui and docs frontend dependencies to latest

ui: Vite 8, vue-tsc 3, TypeScript 6, @vitejs/plugin-vue 6, vis-network 10,
vis-data 8, FontAwesome 7, @types/node 25. docs: Vite 8, plugin-vue 6.
Both migrated to Tailwind CSS v4.

- Tailwind v3 -> v4: @import "tailwindcss" with @theme/@config, switch to
  @tailwindcss/postcss, drop autoprefixer (bundled via Lightning CSS).
- docs: move theme into @theme, delete tailwind.config.js, remove stale
  pnpm-lock.yaml (npm/package-lock.json is authoritative).
- ui: TypeScript 6 removes deprecated tsconfig baseUrl; no code changes
  needed for vis-network 10 / FontAwesome 7.
- Bump CI Node 20 -> 22 (Vite 8 requires Node ^20.19 || >=22.12).

0 npm audit vulnerabilities; ui type-check and both production builds pass.

ui/package.json

@@ -10,19 +10,19 @@
     "type-check": "vue-tsc --noEmit"
   },
   "dependencies": {
-    "vis-data": "^7.1.9",
-    "vis-network": "^9.1.9",
-    "vue": "^3.5.13"
+    "vis-data": "^8.0.4",
+    "vis-network": "^10.1.0",
+    "vue": "^3.5.34"
   },
   "devDependencies": {
-    "@fortawesome/fontawesome-free": "^6.7.2",
-    "@types/node": "^22.10.2",
-    "@vitejs/plugin-vue": "^5.2.1",
-    "autoprefixer": "^10.4.20",
-    "postcss": "^8.4.49",
-    "tailwindcss": "^3.4.17",
-    "typescript": "~5.7.2",
-    "vite": "^6.0.5",
-    "vue-tsc": "^2.2.0"
+    "@fortawesome/fontawesome-free": "^7.2.0",
+    "@tailwindcss/postcss": "^4.3.0",
+    "@types/node": "^25.9.1",
+    "@vitejs/plugin-vue": "^6.0.7",
+    "postcss": "^8.5.15",
+    "tailwindcss": "^4.3.0",
+    "typescript": "~6.0.3",
+    "vite": "^8.0.14",
+    "vue-tsc": "^3.3.1"
   }
 }

ui/postcss.config.js

@@ -1,6 +1,5 @@
 export default {
   plugins: {
-    tailwindcss: {},
-    autoprefixer: {},
+    '@tailwindcss/postcss': {},
   },
 }

ui/src/assets/main.css

@@ -1,6 +1,5 @@
-@tailwind base;
-@tailwind components;
-@tailwind utilities;
+@import "tailwindcss";
+@config "../../tailwind.config.js";
 
 @layer components {
   /* Glass morphism effect */

ui/tsconfig.json

@@ -16,9 +16,8 @@
     "noUnusedParameters": true,
     "noFallthroughCasesInSwitch": true,
     "noUncheckedSideEffectImports": true,
-    "baseUrl": ".",
     "paths": {
-      "@/*": ["src/*"]
+      "@/*": ["./src/*"]
     }
   },
   "include": ["src/**/*.ts", "src/**/*.tsx", "src/**/*.vue"]

ui/tsconfig.tsbuildinfo

@@ -1 +1 @@
-{"root":["./src/main.ts","./src/vite-env.d.ts","./src/components/index.ts","./src/composables/index.ts","./src/composables/usegraphmetrics.ts","./src/composables/usehealth.ts","./src/composables/usesse.ts","./src/composables/usestats.ts","./src/composables/usetimeline.ts","./src/composables/usetypes.ts","./src/composables/useupdate.ts","./src/types/api.ts","./src/types/index.ts","./src/types/observation.ts","./src/types/prompt.ts","./src/types/relation.ts","./src/types/summary.ts","./src/utils/api.ts","./src/utils/formatters.ts","./src/app.vue","./src/components/badge.vue","./src/components/card.vue","./src/components/filtertabs.vue","./src/components/header.vue","./src/components/iconbox.vue","./src/components/observationcard.vue","./src/components/projectfilter.vue","./src/components/promptcard.vue","./src/components/relationgraph.vue","./src/components/scorebreakdown.vue","./src/components/searchanalytics.vue","./src/components/sidebar.vue","./src/components/statscards.vue","./src/components/summarycard.vue","./src/components/systemhealthdetails.vue","./src/components/timeline.vue","./src/components/topobservations.vue"],"version":"5.7.3"}
+{"root":["./src/main.ts","./src/vite-env.d.ts","./src/components/index.ts","./src/composables/index.ts","./src/composables/usegraphmetrics.ts","./src/composables/usehealth.ts","./src/composables/usesse.ts","./src/composables/usestats.ts","./src/composables/usetimeline.ts","./src/composables/usetypes.ts","./src/composables/useupdate.ts","./src/types/api.ts","./src/types/index.ts","./src/types/observation.ts","./src/types/prompt.ts","./src/types/relation.ts","./src/types/summary.ts","./src/utils/api.ts","./src/utils/formatters.ts","./src/app.vue","./src/components/badge.vue","./src/components/card.vue","./src/components/filtertabs.vue","./src/components/header.vue","./src/components/iconbox.vue","./src/components/observationcard.vue","./src/components/projectfilter.vue","./src/components/promptcard.vue","./src/components/relationgraph.vue","./src/components/scorebreakdown.vue","./src/components/searchanalytics.vue","./src/components/sidebar.vue","./src/components/statscards.vue","./src/components/summarycard.vue","./src/components/systemhealthdetails.vue","./src/components/timeline.vue","./src/components/topobservations.vue"],"version":"6.0.3"}