Complete visual overhaul: warm light theme, stadium hero, inline pill nav

Inspired by vtv/Dribbble streaming concept. Every dark surface replaced
with warm off-white (#F5F3F0) and white cards with soft shadows.

Design System: Warm off-white background, white card fills, subtle drop
shadows, dark text hierarchy, warm orange accent (#F27326) replacing
blue as primary interactive color. Added onDark color variants for hero
overlays. Shadow system with card/lifted states.

Navigation: Replaced TabView with inline CategoryPillBar — horizontal
orange pills (Today | Intel | Highlights | Multi-View | Settings).
Single scrolling view, no system chrome. Multi-View as icon button
with stream count badge. Settings as gear icon.

Stadium Hero: Full-bleed stadium photos from MLB CDN
(mlbstatic.com/v1/venue/{id}/spots/1200) as featured game background.
Left gradient overlay for text readability. Live games show score +
inning + DiamondView count/outs. Scheduled games show probable pitchers
with headshots + records. Final games show final score. Warm orange
"Watch Now" CTA pill. Added venue ID mapping for all 30 stadiums to
TeamAssets.

Game Cards: White cards with team color top bar, horizontal team rows,
dark text, soft shadows. Record + streak on every card.

Intel Tab: All dark panels replaced with white cards + shadows.
Replaced dark gradient screen background with flat warm off-white.
58 hardcoded .white.opacity() values replaced with DS.Colors tokens.

Feed Tab: Already used DS.Colors — inherits light theme automatically.

Focus: tvOS focus style uses warm orange border highlight + lifted
shadow instead of white glow on dark.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mlbTVOS/Models/TeamAssets.swift

@@ -59,4 +59,21 @@ enum TeamAssets {
     static func logoURL(forId id: Int) -> URL {
         URL(string: "https://midfield.mlbstatic.com/v1/team/\(id)/spots/72")!
     }
+
+    // Venue IDs for stadium hero photos
+    static let venueIds: [String: Int] = [
+        "ARI": 15, "AZ": 15, "ATL": 4705, "BAL": 2, "BOS": 3,
+        "CHC": 17, "CWS": 4, "CIN": 2602, "CLE": 5, "COL": 19,
+        "DET": 2394, "HOU": 2392, "KC": 7, "LAA": 1,
+        "LAD": 22, "MIA": 4169, "MIL": 32, "MIN": 3312,
+        "NYM": 3289, "NYY": 3313, "OAK": 10, "ATH": 10,
+        "PHI": 2681, "PIT": 31, "SD": 2680, "SF": 2395,
+        "SEA": 680, "STL": 2889, "TB": 12, "TEX": 5325,
+        "TOR": 14, "WSH": 3309,
+    ]
+
+    static func stadiumURL(for code: String) -> URL? {
+        guard let id = venueIds[code.uppercased()] else { return nil }
+        return URL(string: "https://midfield.mlbstatic.com/v1/venue/\(id)/spots/1200")
+    }
 }