docs: add release notes for v0.2.7

RELEASE_v0.2.7.md

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+## Release v0.2.7 - Windows Support & Localhost Binding
+
+Bug fix release improving Windows compatibility and default network binding.
+
+### Changes
+
+**Windows Support**
+- ✅ Fixed template loading errors on Windows
+- ✅ All file paths now use `filepath.Join` for cross-platform compatibility
+- ✅ Binary now works correctly on Windows without path errors
+
+**Localhost Binding**
+- ✅ Server now binds to `127.0.0.1` by default (instead of `0.0.0.0`)
+- ✅ Browser always opens to `http://127.0.0.1:8080`
+- ✅ Setup mode properly opens browser automatically
+- ✅ More secure default - only accessible from local machine
+
+> **Note:** To bind to all network interfaces (for network access), set `host: "0.0.0.0"` in config.yaml
+
+### Installation
+
+Download the appropriate binary for your platform:
+
+```bash
+# Linux
+wget https://git.mchus.pro/mchus/QuoteForge/releases/download/v0.2.7/qfs-v0.2.7-linux-amd64.tar.gz
+tar -xzf qfs-v0.2.7-linux-amd64.tar.gz
+chmod +x qfs-linux-amd64
+./qfs-linux-amd64
+
+# macOS Intel
+curl -L -O https://git.mchus.pro/mchus/QuoteForge/releases/download/v0.2.7/qfs-v0.2.7-darwin-amd64.tar.gz
+tar -xzf qfs-v0.2.7-darwin-amd64.tar.gz
+chmod +x qfs-darwin-amd64
+./qfs-darwin-amd64
+
+# macOS Apple Silicon
+curl -L -O https://git.mchus.pro/mchus/QuoteForge/releases/download/v0.2.7/qfs-v0.2.7-darwin-arm64.tar.gz
+tar -xzf qfs-v0.2.7-darwin-arm64.tar.gz
+chmod +x qfs-darwin-arm64
+./qfs-darwin-arm64
+
+# Windows
+# Download and extract: https://git.mchus.pro/mchus/QuoteForge/releases/download/v0.2.7/qfs-v0.2.7-windows-amd64.zip
+# Run: qfs-windows-amd64.exe
+```
+
+### Breaking Changes
+None - fully backward compatible with v0.2.6
+
+### Upgrade Notes
+- If you use config.yaml with `host: "0.0.0.0"`, the app will respect that setting
+- Default behavior now binds only to localhost for security
+- Windows users no longer need workarounds for path errors
+
+### Full Changelog
+https://git.mchus.pro/mchus/QuoteForge/compare/v0.2.6...v0.2.7