feat(web): 工作区侧栏 - 账号容量进度与签到加油站

头像上方展示已用/剩余/总容量，积分开启且未领取时固定显示品牌加油站卡片，当天领取后消失。

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/lib/account-storage-usage.ts

@@ -0,0 +1,41 @@
+import { formatBytes } from "@/lib/image-utils";
+import type { AccountFileStorageUsage } from "@/services/api/resources";
+
+export const accountFileStorageUsageQueryKey = ["account-file-storage-usage"] as const;
+
+export type AccountStorageTone = "ok" | "warn" | "critical";
+
+export type AccountStorageMeter = {
+    percent: number;
+    remainingBytes: number;
+    usedLabel: string;
+    totalLabel: string;
+    remainingLabel: string;
+    percentLabel: string;
+    tone: AccountStorageTone;
+    full: boolean;
+};
+
+export function formatStorageBytes(value: number) {
+    return formatBytes(value) || "0 B";
+}
+
+export function accountStorageMeter(usage?: AccountFileStorageUsage | null): AccountStorageMeter {
+    const usedBytes = usage && Number.isFinite(usage.usedBytes) ? Math.max(0, usage.usedBytes) : 0;
+    const totalBytes = usage && Number.isFinite(usage.totalBytes) ? Math.max(0, usage.totalBytes) : 0;
+    const remainingBytes = Math.max(0, totalBytes - usedBytes);
+    const percent = totalBytes > 0 ? Math.min(100, (usedBytes / totalBytes) * 100) : 0;
+    const full = totalBytes > 0 && usedBytes >= totalBytes;
+    const tone: AccountStorageTone = full || percent >= 90 ? "critical" : percent >= 70 ? "warn" : "ok";
+
+    return {
+        percent,
+        remainingBytes,
+        usedLabel: formatStorageBytes(usedBytes),
+        totalLabel: formatStorageBytes(totalBytes),
+        remainingLabel: formatStorageBytes(remainingBytes),
+        percentLabel: usedBytes && percent < 0.1 ? "<0.1%" : `${Math.round(percent * 10) / 10}%`,
+        tone,
+        full,
+    };
+}

web/src/lib/sidebar-checkin.ts

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+export function shouldShowSidebarCheckin(input: {
+    creditsEnabled?: boolean;
+    checkinBonusMicrocredits?: number | null;
+    checkedInToday?: boolean;
+}) {
+    return Boolean(input.creditsEnabled && (input.checkinBonusMicrocredits || 0) > 0 && !input.checkedInToday);
+}
+
+export function sidebarCheckinTitle(brandName: string) {
+    const name = brandName.trim() || "影策";
+    return `${name}加油站`;
+}