Implement phase 1

src/lib/core/image.ts

@@ -0,0 +1,30 @@
+import {fetchAuthenticated, getAuthMode, getServerBase} from '$lib/core/auth';
+
+function isAbsoluteUrl(value: string): boolean {
+    return /^https?:\/\//.test(value);
+}
+
+export function resolveImageUrl(path: string | null | undefined): string | undefined {
+    if (!path) return undefined;
+    if (isAbsoluteUrl(path)) return path;
+
+    const normalizedBase = getServerBase().replace(/\/$/, '');
+    const normalizedPath = path.startsWith('/') ? path : `/${path}`;
+    return `${normalizedBase}${normalizedPath}`;
+}
+
+export async function loadImageObjectUrl(path: string, signal?: AbortSignal): Promise<string> {
+    const resolved = resolveImageUrl(path);
+    if (!resolved) throw new Error('Image URL is missing');
+
+    if (getAuthMode() === 'NONE') {
+        return resolved;
+    }
+
+    const response = await fetchAuthenticated(resolved, {}, signal);
+    if (!response.ok) {
+        throw new Error(`Failed to load image: ${response.status}`);
+    }
+
+    return URL.createObjectURL(await response.blob());
+}