feat(http): move Next and Middleware to @webnet/http/router

Both types are only meaningful in a routing context. Moving them to the
./router sub-export keeps them alongside Router and avoids consumers
needing to mix imports from @webnet/http and @webnet/http/router just to
annotate middleware.

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

packages/http/src/index.ts

@@ -7,8 +7,6 @@ export {
   type Handler,
   type JsonBody,
   type ListenOptions,
-  type Middleware,
-  type Next,
   type RawListener,
   type RawTransport,
   type ReadBufferOptions,

packages/http/src/server/index.ts

@@ -6,8 +6,6 @@ export type {
   ServerRequest,
   ServerResponse,
   Context,
-  Next,
-  Middleware,
   Handler,
 } from "./types.js"
 export type {

packages/http/src/server/router.ts

@@ -1,5 +1,6 @@
 import { parse } from "regexparam"
-import type { Context, Handler, Middleware, Next, ServerRequest } from "./types.js"
+import type { Context, Handler, Middleware, ServerRequest } from "./types.js"
+export type { Middleware, Next } from "./types.js"
 
 // Internal type-erased representation stored in layers
 type AnyFn = (ctx: unknown, next: (extra?: unknown) => Promise<void>) => Promise<void>
@@ -52,7 +53,10 @@ export class Router<T extends object = {}, TGlobal extends object = {}> {
     this.#layers = []
   }
 
-  get(path: string, ...middlewaresAndHandler: [...Middleware<T & Match>[], Handler<T & Match>]): this {
+  get(
+    path: string,
+    ...middlewaresAndHandler: [...Middleware<T & Match>[], Handler<T & Match>]
+  ): this {
     this.#method("GET", path, middlewaresAndHandler)
     return this
   }
@@ -63,7 +67,10 @@ export class Router<T extends object = {}, TGlobal extends object = {}> {
     this.#method("POST", path, middlewaresAndHandler)
     return this
   }
-  put(path: string, ...middlewaresAndHandler: [...Middleware<T & Match>[], Handler<T & Match>]): this {
+  put(
+    path: string,
+    ...middlewaresAndHandler: [...Middleware<T & Match>[], Handler<T & Match>]
+  ): this {
     this.#method("PUT", path, middlewaresAndHandler)
     return this
   }
@@ -240,9 +247,7 @@ export class Router<T extends object = {}, TGlobal extends object = {}> {
           const nextFn = chain
           const mw = middleware as unknown as AnyFn
           chain = (c: C): Promise<void> =>
-            mw({ ...c, keys: layerKeys }, (extra?) =>
-              nextFn(extra ? { ...c, ...(extra as C) } : c),
-            )
+            mw({ ...c, keys: layerKeys }, (extra?) => nextFn(extra ? { ...c, ...(extra as C) } : c))
         }
 
         await chain({ ...(baseCtx as unknown as C), route: match.route, keys: match.keys })
@@ -264,9 +269,7 @@ export class Router<T extends object = {}, TGlobal extends object = {}> {
           const nextFn = chain
           const mw = middleware as unknown as AnyFn
           chain = (c: C): Promise<void> =>
-            mw({ ...c, keys: layerKeys }, (extra?) =>
-              nextFn(extra ? { ...c, ...(extra as C) } : c),
-            )
+            mw({ ...c, keys: layerKeys }, (extra?) => nextFn(extra ? { ...c, ...(extra as C) } : c))
         }
 
         await chain(baseCtx as unknown as C)