perf(devframe): dedupe immer between the node and browser builds

node/storage.ts and node/rpc-shared-state.ts reach
devframe/utils/shared-state through the same tsconfig path alias the
browser build's own utils/shared-state entry uses - two independent
rolldown graphs, so each was inlining its own copy of immer
(dist/storage-*.mjs and dist/shared-state-*.mjs, ~38 KB and ~33 KB).

Add devframe/utils/shared-state to the node build's deps.neverBundle
so it's externalized instead of resolved through the tsconfig path
alias; the emitted import resolves at runtime to the already-built
dist/utils/shared-state.mjs chunk via Node's package self-reference
(the client build runs first in the same tsdown invocation, so the
chunk exists on disk by the time the node build needs it). Verified
end-to-end: built dist/node/index.mjs's createStorage() round-trips
through the self-referencing import correctly, and immer's bytes now
appear in exactly one dist chunk.

Author: antfubot

packages/devframe/tsdown.config.ts

@@ -54,6 +54,20 @@ const deps = {
   ],
 }
 
+// The node build reaches `devframe/utils/shared-state` (`node/storage.ts`,
+// `node/rpc-shared-state.ts`) through the same `devframe/utils/shared-state`
+// tsconfig path alias the browser build's own `utils/shared-state` entry
+// uses — two independent rolldown graphs, so left alone each would inline
+// its own copy of `immer`. Externalizing the specifier here (node build
+// only) keeps the tsconfig-paths resolver from ever inlining that source;
+// the emitted `import 'devframe/utils/shared-state'` instead resolves at
+// runtime to the already-built `dist/utils/shared-state.mjs` chunk via
+// Node's package self-reference, so immer's bytes exist exactly once.
+const nodeDeps = {
+  ...deps,
+  neverBundle: [...deps.neverBundle, 'devframe/utils/shared-state'],
+}
+
 // Shared by the runtime client build and the combined dts build below.
 const clientEntries = {
   'client/index': 'src/client/index.ts',
@@ -154,7 +168,7 @@ export default defineConfig([
     clean: false,
     platform: 'node',
     tsconfig,
-    deps,
+    deps: nodeDeps,
     dts: false,
     entry: serverEntries,
   },