fix: separate Biome format and lint checks to enable auto-format

Biome's 'check' command runs both formatting and linting, causing
overlapping failures that prevented auto-format from triggering.
Split into separate commands and removed web-lint check since Biome
linting crashes on Svelte 5 syntax. Renamed check steps for clarity.

.github/workflows/ci.yml

@@ -62,10 +62,6 @@ jobs:
             bun run format:check || echo "::warning::Frontend formatting issues found (not failing on push)"
           fi
 
-      - name: Lint
-        working-directory: web
-        run: bun run lint
-
       - name: Type check
         working-directory: web
         run: bun run typecheck