updated upgrade doc

On branch main
 Your branch is up to date with 'origin/main'.

 Changes to be committed:
	new file:   ZaneyOS-Upgrade.md

ZaneyOS-Upgrade.md

@@ -0,0 +1,123 @@
+# 🚀 ZaneyOS Upgrade Procedure
+
+## v2.3 to v2.4
+
+> ℹ️ **Note:**
+>
+> - This guide applies only to upgrading ZaneyOS from v2.3 to v2.4.
+> - Do **NOT** use the `fu` or `fr` aliases for this upgrade.
+> - Do **NOT** use the `zcli` utility for this upgrade.
+
+---
+
+### 1. 📝 Prepare for Upgrade
+
+1.  **Ensure your current ZaneyOS is up-to-date:**
+    -   Navigate to your ZaneyOS directory:
+        ```bash
+        cd ~/zaneyos
+        ```
+    -   If you have any uncommitted changes, commit and push them.
+    -   Fetch the latest changes:
+        ```bash
+        git stash && git fetch && git pull
+        ```
+    -   Verify that your current host and GPU in `flake.nix` match your system.
+        -   You can edit `flake.nix` manually.
+        -   Depending on your current build, you might be able to run `zcli update-host`.
+    -   If there are any changes, perform a rebuild and reboot:
+        -   Use `fr` or `zcli rebuild`.
+
+2.  **Backup your current ZaneyOS directory:**
+    ```bash
+    mv ~/zaneyos ~/zaneyos-backup
+    ```
+
+3.  **Clone the v2.4 branch:**
+    ```bash
+    git clone https://gitlab.com/zaney/zaneyos.git -b Stable-2.4 --depth=1
+    cd ~/zaneyos
+    ```
+
+---
+
+### 2. 🔄 Converting v2.3 Hosts to v2.4
+
+ZaneyOS v2.4 introduces new features in the host configuration, giving you more control. This requires a manual update to your host files.
+
+-   **New options in `hosts/hostname/variables.nix`:**
+
+    ```nix
+    # Set Display Manager: `tui` for Text, `sddm` for graphical GUI
+    # SDDM background is set with stylixImage
+    displayManager = "sddm";
+
+    # Enable/disable bundled applications
+    tmuxEnable = false;
+    alacrittyEnable = false;
+    weztermEnable = false;
+    ghosttyEnable = false;
+    vscodeEnable = false;
+    helixEnable = false;
+    ```
+
+-   **Migration Steps:**
+
+    1.  **Copy the `default` host template** to a new directory named after your host:
+        ```bash
+        # Replace YOURHOSTNAME with your actual hostname
+        cp -r ~/zaneyos/hosts/default ~/zaneyos/hosts/YOURHOSTNAME
+        ```
+        *Example:* If your hostname is `nixos`:
+        ```bash
+        cp -r ~/zaneyos/hosts/default ~/zaneyos/hosts/nixos
+        ```
+
+    2.  **Copy the hardware configuration** from your backup:
+        ```bash
+        # Replace nixos with your hostname if different
+        cp ~/zaneyos-backup/hosts/nixos/hardware.nix ~/zaneyos/hosts/nixos/hardware.nix
+        ```
+
+    3.  > ❗ **IMPORTANT:** In the `zaneyos` directory, stage your changes:
+        >
+        > ```bash
+        > git add .
+        > ```
+
+    4.  **Manually edit your new host files** (`~/zaneyos/hosts/YOURHOSTNAME`) to include any personal customizations (e.g., monitor settings, extra packages).
+        > ⚠️ **Warning:** Do **NOT** copy/restore your old host files directly! You must integrate your changes into the new v2.4 file structure.
+
+---
+
+### 3. ✅ Test the Configuration
+
+1.  **Verify `flake.nix`:** Ensure your hostname and GPU type are set correctly.
+    -   If you are unsure, run: `zcli update-host`
+
+2.  **Run a configuration check** from the `zaneyos` directory:
+    ```bash
+    nix flake check
+    ```
+    -   If there are no errors, you can proceed to the final step.
+
+---
+
+### 4. ⬆️ Running the Upgrade
+
+> ⚠️ **CRITICAL WARNING:**
+>
+> - Do **NOT** use `fr`, `fu`, or `zcli` for this final upgrade step.
+> - Doing so will cause Hyprland to crash when the display manager (greetd or SDDM) restarts during the switch.
+
+1.  **Execute the rebuild command** from the `zaneyos` directory:
+    ```bash
+    # Replace PROFILE with your GPU (e.g., amd, intel, nvidia, vm)
+    sudo nixos-rebuild boot --flake .#PROFILE
+    ```
+
+2.  **Reboot your system** once the update is complete.
+
+---
+
+### 🎉 Enjoy! Welcome to ZaneyOS v2.4!