feat: initial project scaffold — server, client, Android APK

- FastAPI server with audio mixer (Windows + Voicemeeter), media tracking,
  notifications (progress + alerts), telemetry, and system tray .exe build
- Test suite covering notifications, audio mixer, media, telemetry, and API
- E-Ink web client (vanilla JS, DOM API, block meters, swipe gestures)
- Android WebView APK for BOOX Go 7 Color Gen II (Android 13, Kotlin)
- Design decision records in .pi/docs/design/
- PyInstaller build script for server .exe

server/tests/test_media.py

@@ -0,0 +1,51 @@
+"""Tests for the media tracking module."""
+
+from __future__ import annotations
+
+
+from ..media import MediaManager, MediaState
+
+
+class TestMediaState:
+    def test_defaults(self) -> None:
+        state = MediaState()
+        assert state.title == ""
+        assert state.artist == ""
+        assert not state.is_playing
+        assert state.is_stopped
+        assert state.playback_percentage == 0.0
+
+    def test_playing_state(self) -> None:
+        state = MediaState(
+            title="Test Song",
+            artist="Test Artist",
+            is_playing=True,
+            is_paused=False,
+            is_stopped=False,
+            playback_percentage=45.5,
+        )
+        assert state.title == "Test Song"
+        assert state.is_playing
+        assert state.playback_percentage == 45.5
+
+
+class TestMediaManager:
+    def test_init(self) -> None:
+        manager = MediaManager()
+        assert manager._state is not None
+
+    def test_get_state_returns_dict(self) -> None:
+        manager = MediaManager()
+        state = manager.get_state()
+        assert isinstance(state, dict)
+        assert "title" in state
+        assert "artist" in state
+        assert "is_playing" in state
+        assert "playback_percentage" in state
+
+    def test_get_state_empty_when_nothing_playing(self) -> None:
+        manager = MediaManager()
+        state = manager.get_state()
+        assert state["title"] == ""
+        assert not state["is_playing"]
+        assert state["is_stopped"]