feat(api-docs): generate response examples from Go structs; fix SS2022 PSK regen (#4996)

Stop hand-writing OpenAPI response examples, which kept drifting from the real payloads (clients/traffic missing fields, inbounds/list exposing userId which is json:"-", the fictional inbound-443 tag instead of the real in-<port>-<transport> form).

tools/openapigen now emits frontend/src/generated/examples.ts: a per-struct example instance built from type defaults, validate oneof/min bounds, and example: struct tags, with nested-ref expansion and a cycle guard. build-openapi.mjs composes the {success,obj} envelope from it for any endpoint annotated with responseSchema (+ responseSchemaArray for lists); the hand-written response is dropped for those. Service DTOs InboundOption/ApiTokenView/ProbeResultUI are added to the walker.

#4996: client password regeneration now produces a valid Shadowsocks 2022 PSK (correct base64 length per cipher) when an SS2022 inbound is attached, in both the single and bulk client forms; backend surfaces ssMethod on /inbounds/options so the UI can pick the right length.

Also: Swagger UI persists the Authorization token across reloads (persistAuthorization).

.github/workflows/ci.yml

@@ -37,6 +37,23 @@ jobs:
           go list ./... | grep -v '/frontend/node_modules/' > /tmp/go-packages.txt
           go test $(cat /tmp/go-packages.txt)
 
+  codegen:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-go@v6
+        with:
+          go-version-file: go.mod
+          cache: true
+      - uses: actions/setup-node@v6
+        with:
+          node-version-file: .nvmrc
+      - name: Regenerate schemas, examples and OpenAPI
+        run: npm run gen
+        working-directory: frontend
+      - name: Fail if generated files are stale (run 'npm run gen' and commit)
+        run: git diff --exit-code -- frontend/src/generated frontend/public/openapi.json
+
   govulncheck:
     runs-on: ubuntu-latest
     steps: