Build new shell layout with left sidebar (el-3po)

frontend/src/theme.ts

@@ -1,43 +1,7 @@
-import { createTheme, type PaletteMode } from "@mui/material/styles";
-
-export function getAppTheme(mode: PaletteMode) {
-	const isDark = mode === "dark";
-	return createTheme({
-		palette: {
-			mode,
-			primary: { main: "#4f8cff" },
-			background: {
-				default: isDark ? "#0f172a" : "#f4f6fb",
-				paper: isDark ? "#111827" : "#ffffff",
-			},
-		},
-		shape: { borderRadius: 12 },
-		typography: {
-			fontFamily:
-				'Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif',
-			h5: { fontWeight: 700 },
-		},
-		components: {
-			MuiAppBar: {
-				styleOverrides: {
-					root: {
-						backdropFilter: "blur(8px)",
-						backgroundImage: "none",
-					},
-				},
-			},
-			MuiCard: {
-				styleOverrides: {
-					root: {
-						borderColor: isDark
-							? "rgba(148,163,184,0.25)"
-							: "rgba(15,23,42,0.08)",
-						boxShadow: isDark
-							? "0 2px 12px rgba(2,6,23,0.35)"
-							: "0 2px 8px rgba(15,23,42,0.04)",
-					},
-				},
-			},
-		},
-	});
+export function getAppTheme(mode: "light" | "dark") {
+	void mode;
+	// Theme is now handled by Tailwind CSS + CSS variables in index.css
+	// This function is kept as a no-op shim for backward compatibility
+	// during the MUI → Tailwind migration.
+	return {} as unknown;
 }