Make admin light/dark mode follow real palettes end-to-end.

Light admin derives from the public light theme; dark keeps HK overrides. Remap inputs, cards, muted text, and kill the public wallpaper on admin so fonts and boxes stay readable in both modes.

Co-authored-by: Cursor <[email protected]>

src/lib/theme-contrast.test.ts

@@ -131,6 +131,48 @@ describe("deriveAdminPalette", () => {
 		expect(admin.surface).not.toBe("#00ff00");
 	});
 
+	it("in light mode mirrors readable public surfaces", () => {
+		const admin = deriveAdminPalette(
+			{
+				color_background: "#f8fafc",
+				color_surface: "#ffffff",
+				color_dropdown: "#f1f5f9",
+				color_text: "#0f172a",
+				color_text_muted: "#64748b",
+				color_primary: "#f59e0b",
+				color_navbar: "#ffffff",
+				color_navbar_text: "#1e293b",
+			},
+			{
+				canvas: "#0b0f19",
+				surface: "#151b27",
+				text: "#f8fafc",
+			},
+			"light",
+		);
+		expect(admin.canvas).toBe("#f8fafc");
+		expect(admin.surface).toBe("#ffffff");
+		expect(contrastRatio(admin.text, admin.canvas)).toBeGreaterThanOrEqual(4.5);
+		expect(contrastRatio(admin.sidebarText, admin.sidebar)).toBeGreaterThanOrEqual(
+			4.5,
+		);
+	});
+
+	it("ignores dark admin overrides while in light mode", () => {
+		const admin = deriveAdminPalette(
+			{
+				color_background: "#ffffff",
+				color_surface: "#ffffff",
+				color_text: "#0f172a",
+				color_primary: "#f59e0b",
+			},
+			{ canvas: "#0b0f19", text: "#f8fafc" },
+			"light",
+		);
+		expect(admin.canvas).toBe("#ffffff");
+		expect(admin.text.toLowerCase()).not.toBe("#f8fafc");
+	});
+
 	it("repairs default light text when admin canvas is forced light", () => {
 		const admin = deriveAdminPalette(
 			{ color_primary: "#f59e0b" },