feat(ui): shareholder-grade redesign + live "Your Club" account panel

- New theme.rs design system: palette, embedded fonts, egui Visuals/Style,
  card()/status_pill() helpers.
- Branded hero header (OF monogram), left nav rail, card-based dashboard,
  console-style Logs, themed Config tab, window/taskbar icon.
- New account_monitor.rs: background AccountMonitor (mirrors HealthMonitor,
  5s non-blocking poll) driving a live "Your Club" dashboard card (club
  name/abbr, manager, COINS hero number, level + XP bar, unopened packs,
  funds) with loading/offline/error states.
- account_sync.rs/app.rs/config.rs/main.rs wired to the monitor + theme.
  All existing launch/health/preflight/service/config logic preserved.

src/main.rs

@@ -1,4 +1,5 @@
 mod account_sync;
+mod account_monitor;
 mod app;
 mod arm;
 mod config;
@@ -10,13 +11,16 @@ mod logs;
 mod netcheck;
 mod preflight;
 mod setup;
+mod theme;
 
 fn main() -> eframe::Result<()> {
     let options = eframe::NativeOptions {
         viewport: egui::ViewportBuilder::default()
             .with_title("OpenFUT Launcher")
-            .with_inner_size([780.0, 560.0])
-            .with_min_inner_size([600.0, 400.0]),
+            .with_app_id("openfut-launcher")
+            .with_icon(app_icon())
+            .with_inner_size([1040.0, 720.0])
+            .with_min_inner_size([880.0, 600.0]),
         ..Default::default()
     };
 
@@ -26,3 +30,88 @@ fn main() -> eframe::Result<()> {
         Box::new(|cc| Ok(Box::new(app::LauncherApp::new(cc)))),
     )
 }
+
+/// The application / taskbar icon: the same "OF" monogram the header wordmark
+/// shows, drawn white on the signature accent tile. Generated in code (no PNG
+/// dependency) at 4x supersampling and box-downsampled to a crisp 64x64 RGBA —
+/// scales cleanly to the 32x32 the WM typically renders. Colours come from the
+/// theme palette so the icon never drifts from the in-app brand.
+fn app_icon() -> egui::IconData {
+    const SIZE: usize = 64; // output edge
+    const SS: usize = 4; // supersampling factor
+
+    let accent = theme::ACCENT;
+    let fg = theme::ON_ACCENT;
+
+    // Rounded-square background: point inside the [0,SIZE]² square with corners
+    // rounded to `round_r` (transparent outside, so the icon reads as a tile).
+    let round_r = 13.0_f32;
+    let inside_bg = |x: f32, y: f32| -> bool {
+        let s = SIZE as f32;
+        let cx = x.clamp(round_r, s - round_r);
+        let cy = y.clamp(round_r, s - round_r);
+        let (dx, dy) = (x - cx, y - cy);
+        dx * dx + dy * dy <= round_r * round_r
+    };
+
+    // "O" — an elliptical ring on the left.
+    let inside_o = |x: f32, y: f32| -> bool {
+        let (cx, cy) = (21.0_f32, 32.0_f32);
+        let (dx, dy) = (x - cx, y - cy);
+        let outer = (dx / 9.0).powi(2) + (dy / 14.0).powi(2) <= 1.0;
+        let inner = (dx / 4.8).powi(2) + (dy / 9.5).powi(2) < 1.0;
+        outer && !inner
+    };
+
+    // "F" — a stem plus a top and middle bar on the right.
+    let inside_f = |x: f32, y: f32| -> bool {
+        let stem = (34.0..=39.0).contains(&x) && (18.0..=46.0).contains(&y);
+        let top = (34.0..=52.0).contains(&x) && (18.0..=23.0).contains(&y);
+        let mid = (34.0..=48.0).contains(&x) && (29.5..=34.0).contains(&y);
+        stem || top || mid
+    };
+
+    // Premultiplied-alpha accumulation per output pixel so antialiased edges
+    // (both the rounded tile and the letters) never fringe dark.
+    let mut rgba = vec![0u8; SIZE * SIZE * 4];
+    for oy in 0..SIZE {
+        for ox in 0..SIZE {
+            let (mut ar, mut ag, mut ab, mut aa) = (0.0_f32, 0.0_f32, 0.0_f32, 0.0_f32);
+            for sy in 0..SS {
+                for sx in 0..SS {
+                    let x = ox as f32 + (sx as f32 + 0.5) / SS as f32;
+                    let y = oy as f32 + (sy as f32 + 0.5) / SS as f32;
+                    let (r, g, b, a) = if inside_o(x, y) || inside_f(x, y) {
+                        (fg.r(), fg.g(), fg.b(), 255u16)
+                    } else if inside_bg(x, y) {
+                        (accent.r(), accent.g(), accent.b(), 255u16)
+                    } else {
+                        (0, 0, 0, 0)
+                    };
+                    let af = a as f32 / 255.0;
+                    ar += r as f32 * af;
+                    ag += g as f32 * af;
+                    ab += b as f32 * af;
+                    aa += af;
+                }
+            }
+            let samples = (SS * SS) as f32;
+            let idx = (oy * SIZE + ox) * 4;
+            let (r, g, b) = if aa > 0.0 {
+                (ar / aa, ag / aa, ab / aa)
+            } else {
+                (0.0, 0.0, 0.0)
+            };
+            rgba[idx] = r.round() as u8;
+            rgba[idx + 1] = g.round() as u8;
+            rgba[idx + 2] = b.round() as u8;
+            rgba[idx + 3] = (aa / samples * 255.0).round() as u8;
+        }
+    }
+
+    egui::IconData {
+        rgba,
+        width: SIZE as u32,
+        height: SIZE as u32,
+    }
+}