Advance M8-M11 parity workflows

web/tests/unit/storage-budget.test.mjs

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+import assert from "node:assert/strict";
+import fs from "node:fs";
+import path from "node:path";
+import test from "node:test";
+import ts from "typescript";
+
+const repoRoot = path.resolve(import.meta.dirname, "../../..");
+const sourcePath = path.join(repoRoot, "web/protocol/storage-budget.ts");
+const transpiled = ts.transpileModule(fs.readFileSync(sourcePath, "utf8"), {
+  compilerOptions: { module: ts.ModuleKind.ES2022, target: ts.ScriptTarget.ES2022 },
+  fileName: sourcePath,
+  reportDiagnostics: true,
+});
+assert.deepEqual(transpiled.diagnostics, []);
+const moduleUrl = "data:text/javascript;base64," + Buffer.from(transpiled.outputText).toString("base64");
+const { createStorageBudget, formatStorageBytes } = await import(moduleUrl);
+
+test("M7-11 storage budget reports stable category totals", () => {
+  const budget = createStorageBudget("budget", { projectBytes: 10, snapshotBytes: 20, lodBytes: 30, mediaBytes: 40, vdbBytes: 50 });
+  assert.deepEqual(budget, { schemaVersion: 1, projectId: "budget", projectBytes: 10, snapshotBytes: 20, lodBytes: 30, mediaBytes: 40, vdbBytes: 50, totalBytes: 150 });
+  assert.equal(formatStorageBytes(1024), "1.0 KiB");
+  assert.equal(formatStorageBytes(1024 * 1024), "1.0 MiB");
+});
+
+test("M7-11 storage budget rejects invalid or overflowing categories", () => {
+  assert.throws(() => createStorageBudget("budget", { mediaBytes: -1 }), /STORAGE_BUDGET_INVALID/);
+  assert.throws(() => createStorageBudget("budget", { projectBytes: Number.MAX_SAFE_INTEGER, mediaBytes: Number.MAX_SAFE_INTEGER }), /STORAGE_BUDGET_INVALID/);
+  assert.throws(() => formatStorageBytes(-1), /STORAGE_BUDGET_INVALID/);
+});