feat(core): add Electron runtime, services, and app composition

src/core/utils/coerce.ts

@@ -0,0 +1,31 @@
+export function asFiniteNumber(
+  value: unknown,
+  fallback: number,
+  min?: number,
+  max?: number,
+): number {
+  if (typeof value !== 'number' || !Number.isFinite(value)) return fallback;
+  if (min !== undefined && value < min) return min;
+  if (max !== undefined && value > max) return max;
+  return value;
+}
+
+export function asString(value: unknown, fallback: string): string {
+  if (typeof value !== 'string') return fallback;
+  const trimmed = value.trim();
+  return trimmed.length > 0 ? trimmed : fallback;
+}
+
+export function asBoolean(value: unknown, fallback: boolean): boolean {
+  if (typeof value === 'boolean') return value;
+  if (typeof value === 'string') {
+    const normalized = value.trim().toLowerCase();
+    if (normalized === 'yes' || normalized === 'true' || normalized === '1') {
+      return true;
+    }
+    if (normalized === 'no' || normalized === 'false' || normalized === '0') {
+      return false;
+    }
+  }
+  return fallback;
+}