Initial commit: EventTracker desktop app + Android companion

Desktop: GTK3 + matplotlib app tracking arbitrary events (button ->
timestamp -> CSV), with per-event stats, trend charts, settings
(rename/add events, relocate data file), and a reset-with-backup flow.
Portable desktop launcher via a .desktop.in template + install script,
no machine-specific paths baked in.

Android: minimal Kivy v1 companion reading/writing the same CSV format,
plus buildozer build tooling isolated in a venv and a local p4a recipe
override for kivy (see CLAUDE.md for why).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

install-launcher.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+# Generates event-tracker.desktop for wherever this repo is actually
+# cloned (event-tracker.desktop.in is a template, not a working launcher
+# — it has no machine-specific path baked in) and installs it. Re-run
+# any time after moving the clone; safe to re-run otherwise.
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+DEST="$HOME/.local/share/applications/event-tracker.desktop"
+
+mkdir -p "$(dirname "$DEST")"
+sed \
+    -e "s#__EXEC_PATH__#$SCRIPT_DIR/event_tracker.py#" \
+    -e "s#__ICON_PATH__#$SCRIPT_DIR/event-tracker.png#" \
+    "$SCRIPT_DIR/event-tracker.desktop.in" > "$DEST"
+chmod +x "$SCRIPT_DIR/event_tracker.py" "$DEST"
+update-desktop-database "$HOME/.local/share/applications" 2>/dev/null || true
+
+echo "Installed launcher: $DEST"