fix: resolve in-page channel functions across chained registries

packages/devframe/src/in-page-channel/internal.ts

@@ -174,6 +174,7 @@ const FUNCTION_METHOD_PREFIX = channelMethod('function', '')
  */
 export function createLocalFunctionRegistry(codec: InPageChannelSerialization): {
   register: (definition: InPageFunctionDefinitionAny) => void
+  registerInternal: (method: string, handler: (...args: unknown[]) => unknown) => void
   on: (name: string, listener: (...args: unknown[]) => void) => () => void
   resolve: (name: string) => ((...args: unknown[]) => unknown) | undefined
 } {
@@ -183,6 +184,12 @@ export function createLocalFunctionRegistry(codec: InPageChannelSerialization):
     register(definition) {
       definitions.set(channelMethod(definition.type, definition.name), definition)
     },
+    // The shared-state layer keys its handlers by their own fully-qualified
+    // wire methods (`devframe:in-page:page-state:*`, the panel-state events),
+    // so they register verbatim rather than through `channelMethod`.
+    registerInternal(method, handler) {
+      definitions.set(method, { name: method, handler })
+    },
     on(name, listener) {
       const key = channelMethod('event', name)
       let registered = listeners.get(key)
@@ -200,14 +207,8 @@ export function createLocalFunctionRegistry(codec: InPageChannelSerialization):
     resolve(name) {
       const definition = definitions.get(name)
       const registered = listeners.get(name)
-      if (!definition && !registered?.size) {
-        if (name.startsWith(FUNCTION_METHOD_PREFIX)) {
-          return () => {
-            throw diagnostics.DF0077({ name: name.slice(FUNCTION_METHOD_PREFIX.length) })
-          }
-        }
+      if (!definition && !registered?.size)
         return undefined
-      }
       return async (...rawArgs: unknown[]) => {
         const args = codec.deserialize ? rawArgs.map(codec.deserialize) : rawArgs
         if (definition?.jsonSerializable)
@@ -227,6 +228,31 @@ export function createLocalFunctionRegistry(codec: InPageChannelSerialization):
   }
 }
 
+type LocalHandler = (...args: unknown[]) => unknown
+
+/**
+ * Consult each registry in order and, only once none owns the name, fall back
+ * to the coded "not registered" error for a `function:` call (events stay
+ * silent). The fallback lives here, after every registry, so chaining a
+ * state registry ahead of the user registry never masks a real handler.
+ */
+export function resolveLocalHandler(
+  name: string,
+  registries: ((name: string) => LocalHandler | undefined)[],
+): LocalHandler | undefined {
+  for (const registry of registries) {
+    const handler = registry(name)
+    if (handler)
+      return handler
+  }
+  if (name.startsWith(FUNCTION_METHOD_PREFIX)) {
+    return () => {
+      throw diagnostics.DF0077({ name: name.slice(FUNCTION_METHOD_PREFIX.length) })
+    }
+  }
+  return undefined
+}
+
 type RemoteFunctions = Record<string, (...args: any[]) => any>
 
 export interface AttachChannelPortOptions {

packages/devframe/src/in-page-channel/page-script.ts

@@ -15,6 +15,7 @@ import {
   DEFAULT_CALL_TIMEOUT_MS,
   deserializeResult,
   resolveHeartbeat,
+  resolveLocalHandler,
   serializeArgs,
   warnOnce,
   withCallDeadline,
@@ -106,10 +107,10 @@ export function createPageScriptChannel<P extends InPageChannelProtocol>(
       },
     })
     const stateRegistry = createLocalFunctionRegistry(codec)
-    for (const [name, handler] of Object.entries(internal.internalHandlers))
-      stateRegistry.register({ name, handler })
+    for (const [method, handler] of Object.entries(internal.internalHandlers))
+      stateRegistry.registerInternal(method, handler)
     internal.attached = attachChannelPort(port, {
-      resolveLocal: fnName => stateRegistry.resolve(fnName) ?? registry.resolve(fnName),
+      resolveLocal: fnName => resolveLocalHandler(fnName, [stateRegistry.resolve, registry.resolve]),
       onControl: (kind) => {
         if (kind === 'ping')
           internal.attached.postControl('pong')

packages/devframe/src/in-page-channel/panel.ts

@@ -16,6 +16,7 @@ import {
   deserializeResult,
   InPageChannelError,
   resolveHeartbeat,
+  resolveLocalHandler,
   serializeArgs,
   warnOnce,
   withCallDeadline,
@@ -91,8 +92,8 @@ export function connectPanelChannel<P extends InPageChannelProtocol>(
     call: (method, args) => enqueueCall(method, serializeArgs(codec, args)),
   })
   const stateRegistry = createLocalFunctionRegistry(codec)
-  for (const [name, handler] of Object.entries(stateHost.handlers))
-    stateRegistry.register({ name, handler })
+  for (const [method, handler] of Object.entries(stateHost.handlers))
+    stateRegistry.registerInternal(method, handler)
 
   function sendEventNow(method: string, args: unknown[]): void {
     void attached?.rpc.$callRaw({ method, args, event: true, optional: true }).catch(() => {})
@@ -144,7 +145,7 @@ export function connectPanelChannel<P extends InPageChannelProtocol>(
     // another instance the user pinned to) replaces the previous port.
     attached?.dispose({ bye: true, reason: 'the panel adopted a newer port' })
     attached = attachChannelPort(port, {
-      resolveLocal: fnName => stateRegistry.resolve(fnName) ?? registry.resolve(fnName),
+      resolveLocal: fnName => resolveLocalHandler(fnName, [stateRegistry.resolve, registry.resolve]),
       onControl: (kind) => {
         if (kind === 'ping')
           attached?.postControl('pong')