fix: specify exact init/1 argument pattern in runtime specs

Make init/1 specs more specific to match Dialyzer's success typing:
- Changed from generic keyword() to specific pattern
  [{:component_base, Path.t()} | {:render_timeout, timeout()}, ...]
- This matches the actual function head pattern matching

Resolves final Dialyzer "invalid_contract" warnings.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: GSMLG-BOT

lib/phoenix/react_server/runtime/bun.ex

@@ -74,7 +74,7 @@ defmodule Phoenix.ReactServer.Runtime.Bun do
   end
 
   @impl true
-  @spec init(keyword()) ::
+  @spec init([{:component_base, Path.t()} | {:render_timeout, timeout()}, ...]) ::
           {:ok, Phoenix.ReactServer.Runtime.t(), {:continue, :start_port}}
   def init(component_base: component_base, render_timeout: render_timeout) do
     {:ok,

lib/phoenix/react_server/runtime/deno.ex

@@ -93,7 +93,7 @@ defmodule Phoenix.ReactServer.Runtime.Deno do
   end
 
   @impl true
-  @spec init(keyword()) ::
+  @spec init([{:component_base, Path.t()} | {:render_timeout, timeout()}, ...]) ::
           {:ok, Phoenix.ReactServer.Runtime.t(), {:continue, :start_port}}
   def init(component_base: component_base, render_timeout: render_timeout) do
     {:ok,