feat: pnpm workspace, deep links, and web repos page (#476)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -190,6 +190,22 @@ jobs:
             /tmp/sprout-relay.log
           if-no-files-found: ignore
 
+  web:
+    name: Web
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - uses: cashapp/activate-hermit@e49f5cb4dd64ff0b0b659d1d8df499595451155a # v1
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+      - name: Web lint and format
+        run: just web-check
+      - name: Web build
+        run: just web-build
+
   mobile:
     name: Mobile
     runs-on: ubuntu-latest