Accent tone setting with macOS-style swatches (indigo default)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/shared/types.ts

@@ -41,8 +41,20 @@ export interface ConnectionsFile {
 	connections: SavedConnection[];
 }
 
+export type AccentTone =
+	| "graphite"
+	| "blue"
+	| "indigo"
+	| "purple"
+	| "rose"
+	| "orange"
+	| "green"
+	| "teal";
+
 export interface AppSettings {
 	theme: "system" | "light" | "dark";
+	/** Accent tone for chrome and selection tint; graphite = neutral zinc. */
+	accent: AccentTone;
 	speedUnit: "MBps" | "Mbps";
 	/** Font size of the path bar and file list. */
 	textSize: "compact" | "default" | "large";
@@ -60,6 +72,7 @@ export interface AppSettings {
 
 export const DEFAULT_SETTINGS: AppSettings = {
 	theme: "system",
+	accent: "indigo",
 	speedUnit: "MBps",
 	textSize: "default",
 	transferMode: "single",