Publish first usable Windows release instructions and validation

README.md

@@ -79,12 +79,15 @@ autoplays when you select a result.
 
 ## Get searchi
 
-**searchi is in active development. Ready-to-install downloads have not been
-published yet.** Windows, macOS and Linux are the intended desktop platforms;
-packaged releases and platform testing are still being completed.
+**The first Windows x64 version is available.**
 
-Check the [releases page](https://tea.karlcom.de/karl/searchi/releases) for
-published downloads, or let your local AI agent handle setup for you.
+- [Download the Windows installer](https://tea.karlcom.de/karl/searchi/releases/download/v0.1.0/searchi_0.1.0_x64-setup.exe) — about 99 MB.
+- [Download the portable ZIP](https://tea.karlcom.de/karl/searchi/releases/download/v0.1.0/searchi-0.1.0-windows-x64.zip) — about 145 MB. Extract the entire folder and open `searchi-desktop.exe`.
+- [Checksums](https://tea.karlcom.de/karl/searchi/releases/download/v0.1.0/SHA256SUMS.txt) · [Release notes](https://tea.karlcom.de/karl/searchi/releases/tag/v0.1.0).
+
+The installer creates a launcher and sets up WebView2 if needed. This initial
+release is unsigned. macOS and Linux packages follow; source build instructions
+are available now. You can also let your local AI agent handle setup.
 
 ### Install with your agent — copy and paste
 
@@ -95,7 +98,8 @@ Install searchi on this computer and get it ready for my first search.
 Official repository: https://tea.karlcom.de/karl/searchi
 
 Detect my operating system and processor architecture. Use a suitable official
-release if one is available, verifying any published checksums. Otherwise,
+release from the README or releases page, including the initial Windows release,
+verifying its published checksums. Otherwise,
 set up the current source version using the repository's installation/build
 instructions. Handle the required tools and dependencies for me; don't just
 give me a list of commands to run. Keep the installation in a dedicated folder
@@ -119,10 +123,10 @@ search followed by a search in my own words.
 ```
 
 Your agent needs internet access and permission to install software locally.
-Since installers aren't published yet, setup currently involves building the
-app and may take a while. The local search model downloads approximately
-**865 MB**. Windows, macOS and Linux release validation is still in progress;
-your agent should report any platform limitation it encounters.
+Windows x64 setup can use the published installer; other platforms currently
+build from source. The local search model downloads approximately **865 MB**
+once, and cached assets are reused. Your agent should report any platform
+limitation it encounters.
 
 Prefer to set it up yourself? See the
 [build and launch instructions](docs/BUILDING.md).