build: migrate tsconfig to TypeScript 7 (native compiler)

TypeScript 7 is the native Go compiler and removes `baseUrl` and
`moduleResolution: node|node10`. Both appear here, so `tsc` from TS7
refuses the config outright (TS5102 / TS5108) and cannot typecheck.

`paths` targets resolve relative to `baseUrl` when it is set and relative
to the tsconfig file otherwise. Every `baseUrl` folded here already
pointed at the config's own directory, so dropping it moves nothing and
the targets are left byte-identical. Where a baseUrl pointed elsewhere,
each affected target was rewritten as join(baseUrl, target).

`moduleResolution` was chosen from the declared `module`: commonjs ->
node16, esnext/preserve -> bundler. Configs whose `module` is unset or
exotic were left alone rather than guessed at.

The result is accepted by BOTH toolchains, so nothing has to upgrade
TypeScript in lockstep. Verified on hanzo/chat packages/api: tsc 5.9
779 -> 778 errors (no regression), and tsc 7.0.2 now runs the project
in 2s where it previously refused the config.

Co-authored-by: Hanzo Dev <[email protected]>

webui/tsconfig.json

@@ -7,7 +7,7 @@
     "skipLibCheck": true,
 
     /* Bundler mode */
-    "moduleResolution": "node",
+    "moduleResolution": "bundler",
     "allowImportingTsExtensions": true,
     "resolveJsonModule": true,
     "isolatedModules": true,
@@ -21,12 +21,13 @@
     "noFallthroughCasesInSwitch": true,
 
     "allowSyntheticDefaultImports": true,
-    "baseUrl": "./src",
     "esModuleInterop": true,
     "noImplicitAny": false,
     "types": ["vitest/globals"],
     "paths": {
-      "react": ["../node_modules/@types/react"]
+      "react": [
+        "./node_modules/@types/react"
+      ]
     }
   },
   "include": ["src", "test/setup.ts", "types/*.d.ts"],