chore(web): stop tracking tsc incremental build state

tsconfig.*.tsbuildinfo is a cache tsc regenerates from the sources; it
carries absolute paths from whoever built last and would conflict on
every branch that touches a .ts file.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XZG2i4AmfSqE97EJGBVb64

.gitignore

@@ -1,3 +1,4 @@
 /target
 web/node_modules
 web/dist
+web/*.tsbuildinfo

web/tsconfig.app.tsbuildinfo

@@ -1 +0,0 @@
-{"root":["./src/App.tsx","./src/main.tsx","./src/virtual.d.ts","./src/api/client.ts","./src/components/Layout.tsx","./src/components/Markdown.tsx","./src/components/StatusBadge.tsx","./src/lib/format.ts","./src/lib/useAsync.ts","./src/routes/Home.tsx","./src/routes/Models.tsx","./src/routes/NotFound.tsx","./src/routes/Repo.tsx"],"version":"5.9.3"}

web/tsconfig.node.tsbuildinfo

@@ -1 +0,0 @@
-{"root":["./vite.config.ts"],"version":"5.9.3"}