Redesign UI as light-themed week-grid calendar matching Skylight-style device

- Replace scrolling event list + photo background with a Sun–Sat week grid
  plus a "Next Week" preview column; Prev/Next navigation and per-member filter
- Add [Name] event title prefix convention for color-coded family member cards
  (Ludwig/Dad=blue, Michelle/Mom=pink, Jason=green, Daniel=yellow)
- /api/calendar now accepts ?start=YYYY-MM-DD, returns bucketed week payload
  with member/color metadata; fetches 14 days to populate Next Week column
- Drop rotating background photo and dad joke from the display (endpoints kept)
- Update README with new UI overview, prefix convention, and API docs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

config.py

@@ -29,3 +29,14 @@ class Config:
     # Directories
     BACKGROUNDS_DIR = os.path.join('static', 'backgrounds')
     CREDENTIALS_DIR = 'credentials'
+
+    # Family members for event color-coding.
+    # Event titles prefixed with "[Alias]" (e.g. "[Daniel] Football Practice")
+    # are tagged with that member's name/color and the prefix is stripped for display.
+    FAMILY_MEMBERS = [
+        {'key': 'dad', 'name': 'Ludwig', 'aliases': ['ludwig', 'dad'], 'color': '#4A90D9', 'bg': '#DCEAFB'},
+        {'key': 'mom', 'name': 'Michelle', 'aliases': ['michelle', 'mom'], 'color': '#D9669B', 'bg': '#FBDDEB'},
+        {'key': 'jason', 'name': 'Jason', 'aliases': ['jason'], 'color': '#5FA85B', 'bg': '#E1F2DD'},
+        {'key': 'daniel', 'name': 'Daniel', 'aliases': ['daniel'], 'color': '#D9A53B', 'bg': '#FBEFD3'},
+    ]
+    DEFAULT_MEMBER = {'key': 'family', 'name': 'Family', 'color': '#8C8C8C', 'bg': '#E9E9E9'}