Fix dev compose: npm install on container startup

The ./server bind mount overwrites /app/server including node_modules
installed during the Docker build. Running npm install on startup
ensures deps are present after the volume mount.

Also reverts the node_modules named-volume workaround in favor of
this cleaner approach (requires node installed locally for non-Docker dev).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/settings.local.json

@@ -18,7 +18,13 @@
       "Bash(docker --version)",
       "Bash(docker compose:*)",
       "Bash(docker build:*)",
-      "Bash(docker run:*)"
+      "Bash(docker run:*)",
+      "Bash(export PATH=\"/home/christian/.nvm/versions/node/v24.14.0/bin:$PATH\")",
+      "Bash(npm install:*)",
+      "Bash(npm run:*)",
+      "Bash(/home/christian/.nvm/versions/node/v24.14.0/bin/npm run:*)",
+      "Bash(PATH=\"/home/christian/.nvm/versions/node/v24.14.0/bin:$PATH\" npm run build 2>&1)",
+      "Bash(PATH=\"/home/christian/.nvm/versions/node/v24.14.0/bin:$PATH\" npx vite build 2>&1)"
     ]
   }
 }