fix(ai,coding-agent): make pi-ai browser-safe and move OAuth runtime exports

- add browser smoke bundling check to root check + pre-commit

- lazy-load Bedrock provider registration to avoid browser graph traversal

- remove top-level OAuth runtime exports from @mariozechner/pi-ai

- add @mariozechner/pi-ai/oauth subpath export and update coding-agent imports

- move proxy dispatcher init to coding-agent CLI (Node-only)

- document Bedrock/OAuth browser limitations

closes #1814

.husky/pre-commit

@@ -11,6 +11,25 @@ if [ $? -ne 0 ]; then
   exit 1
 fi
 
+RUN_BROWSER_SMOKE=0
+for file in $STAGED_FILES; do
+  case "$file" in
+    packages/ai/*|packages/web-ui/*|package.json|package-lock.json)
+      RUN_BROWSER_SMOKE=1
+      break
+      ;;
+  esac
+done
+
+if [ $RUN_BROWSER_SMOKE -eq 1 ]; then
+  echo "Running browser smoke check..."
+  npm run check:browser-smoke
+  if [ $? -ne 0 ]; then
+    echo "❌ Browser smoke check failed."
+    exit 1
+  fi
+fi
+
 # Restage files that were previously staged and may have been modified by formatting
 for file in $STAGED_FILES; do
   if [ -f "$file" ]; then
@@ -18,4 +37,4 @@ for file in $STAGED_FILES; do
   fi
 done
 
-echo "✅ All pre-commit checks passed!"
+echo "✅ All pre-commit checks passed!"