fix(install): keep git bash handoff

DONE.md

@@ -28,6 +28,8 @@
   - `install.sh` now delegates to the Windows installer to avoid mixed-shell prompts.
 - ✅ **Windows installer entrypoint**
   - Added `install-windows.ps1` and made `install.sh` Windows-safe with a clear handoff message.
+- ✅ **Git Bash Windows handoff**
+  - `install.sh` now runs the Windows installer in the same terminal via `winpty` when available.
 
 ## Version 0.1.0-dev25 (2026-01-22) - Settings Preferences Expansion
 

TODO.md

@@ -14,6 +14,8 @@ This file tracks upcoming features, improvements, and known issues.
   - Route Windows to the dedicated installer to avoid mixed-shell prompts.
 - [X] **Windows installer entrypoint**
   - Provide a PowerShell entrypoint and direct Windows users to it from install.sh.
+- [X] **Git Bash handoff**
+  - Keep Windows installs in the same Git Bash terminal using `winpty` when available.
 
 ## Documentation: Fix Structural Errors
 

docs/INSTALL_WINDOWS.md

@@ -28,7 +28,7 @@ If you haven't already, download the project files as a ZIP and extract them to
 
 Once the script finishes, you can run the application by double-clicking `run.bat` in the main project folder.
 
-> **Note:** On Windows, use `setup-windows.bat` or `scripts\install-windows.ps1` instead of `scripts/install.sh` to avoid mixed-shell prompts.
+> **Note:** If you run `scripts/install.sh` from Git Bash, it will stay in the same terminal and hand off to PowerShell automatically.
 
 ---
 

scripts/install.sh

@@ -105,11 +105,17 @@ echo ""
 
 # Windows uses a dedicated installer to avoid Git Bash/PowerShell chaining.
 if [ "$IS_WINDOWS" = true ]; then
-    echo -e "${YELLOW}NOTICE:${NC} Windows detected."
-    echo "Please run one of the dedicated Windows installers instead:"
-    echo "  - $PROJECT_ROOT\\scripts\\setup-windows.bat"
-    echo "  - $PROJECT_ROOT\\scripts\\install-windows.ps1"
-    exit 0
+    if command -v winpty &> /dev/null; then
+        winpty powershell.exe -NoProfile -ExecutionPolicy Bypass -File "$PROJECT_ROOT/scripts/install-deps-windows.ps1"
+        exit $?
+    fi
+    if command -v powershell.exe &> /dev/null; then
+        powershell.exe -NoProfile -ExecutionPolicy Bypass -File "$PROJECT_ROOT/scripts/install-deps-windows.ps1"
+        exit $?
+    fi
+    echo -e "${RED}[ERROR]${NC} powershell.exe not found."
+    echo "Please run: $PROJECT_ROOT\\scripts\\setup-windows.bat"
+    exit 1
 fi
 
 # Step 1: Check if Go is installed