Add: windows mvp - transparent bugs not fixed

docs/CONFIG_REFERENCE.md

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+# Sprimo Config Reference
+
+File location:
+
+- Windows: `%APPDATA%/sprimo/config.toml`
+- macOS: `~/Library/Application Support/sprimo/config.toml`
+- Linux: `~/.config/sprimo/config.toml`
+
+## Schema
+
+```toml
+[window]
+x = 200.0
+y = 200.0
+monitor_id = ""
+scale = 1.0
+always_on_top = true
+click_through = false
+visible = true
+
+[animation]
+fps = 30
+idle_timeout_ms = 3000
+
+[sprite]
+selected_pack = "default"
+sprite_packs_dir = "sprite-packs"
+
+[api]
+port = 32145
+auth_token = "generated-uuid-token"
+
+[logging]
+level = "info"
+
+[controls]
+hotkey_enabled = true
+recovery_hotkey = "Ctrl+Alt+P"
+```
+
+## Notes
+
+- `auth_token` is generated on first run if config does not exist.
+- `window.x`, `window.y`, `window.scale`, and flag fields are persisted after matching commands.
+- On Windows, `recovery_hotkey` provides click-through recovery even when the window is non-interactive.