Initial commit: epaper-dashboard for 7.3" ACeP 7-Color display

- dashboard.py: plugin-based renderer with 4x4 grid layout
- admin.py: web UI with layout editor + plugin configs
- layout.py: pack algorithm, item placement, grid system
- plugins/: clock, weather, system, spotify, strava, gmail, minimax, hello
- network_watchdog.py: WiFi AP/client mode management
- waveshare_epd_init.py: vendor driver stub

test_sizes_mix.py

@@ -0,0 +1,57 @@
+"""Test alle Widgets in verschiedenen Groessen, um Layout-Probleme zu finden."""
+import sys; sys.path.insert(0, ".")
+from PIL import Image, ImageDraw, ImageFont
+from layout import Item
+from plugins.clock import Widget as ClockW
+from plugins.weather import Widget as WeatherW
+from plugins.system import Widget as SystemW
+from plugins.minimax import Widget as MiniMaxW
+from plugins.hello import Widget as HelloW
+import json
+
+def font(size):
+    return ImageFont.truetype("fnt/Aldrich-Regular.ttc", size)
+fonts = {
+    "16": font(16), "20": font(20), "24": font(24),
+    "28": font(28), "32": font(32), "48": font(48),
+    "60": font(60), "80": font(80),
+    "clock": ImageFont.truetype("fnt/advanced_led_board-7.ttc", 100),
+}
+
+plugins_cfg = json.load(open("config.json")).get("plugin_configs", {})
+
+# Layout test grid: 4x4
+# (0,0)-(3,0): system 4x1 wide
+# (0,1)-(1,1): weather 2x1
+# (2,1)-(3,1): minimax 2x1
+# (0,2)-(1,3): hello 2x2
+# (2,2)-(3,3): mix
+img = Image.new("RGB", (800, 480), (255,255,255))
+draw = ImageDraw.Draw(img)
+
+# system 4x1 (full width strip)
+w = SystemW(plugins_cfg.get("system", {}))
+w.fetch()
+w.render(draw, fonts, 0, 0, 800, 120)
+
+# weather 2x1
+w = WeatherW(plugins_cfg.get("weather", {"location": "52.52,13.41"}))
+w.fetch()
+w.render(draw, fonts, 0, 120, 400, 120)
+
+# minimax 2x1
+w = MiniMaxW(plugins_cfg.get("minimax", {}))
+w.fetch()
+w.render(draw, fonts, 400, 120, 400, 120)
+
+# hello 2x2
+w = HelloW({"text": "Layout Test", "color": "accent"})
+w.render(draw, fonts, 0, 240, 400, 240)
+
+# clock 2x2
+w = ClockW({"show_date": True})
+w.fetch()
+w.render(draw, fonts, 400, 240, 400, 240)
+
+img.save("/tmp/sizes_mix.png")
+print("saved /tmp/sizes_mix.png")