feat: add inline icons for edit

src/frontmatter/validateFrontmatter.test.ts

@@ -0,0 +1,96 @@
+import { describe, expect, it } from "vitest";
+import { MAX_TASK_TITLE_LENGTH } from "@/model/taskFile";
+import { validateFrontmatter } from "./validateFrontmatter";
+
+const valid = `---
+id: "550e8400-e29b-41d4-a716-446655440000"
+title: Fix login
+status: todo
+priority: high
+tags: [bug]
+assignee: ""
+created: 2026-07-12T10:00:00.000Z
+updated: 2026-07-12T10:00:00.000Z
+---
+
+Body
+`;
+
+describe("validateFrontmatter", () => {
+	it("accepts a valid task file", () => {
+		expect(validateFrontmatter(valid)).toEqual([]);
+	});
+
+	it("errors when frontmatter is missing", () => {
+		const issues = validateFrontmatter("no frontmatter\n");
+		expect(issues).toHaveLength(1);
+		expect(issues[0].severity).toBe("error");
+		expect(issues[0].message).toMatch(/frontmatter/i);
+	});
+
+	it("errors when frontmatter is unclosed", () => {
+		const issues = validateFrontmatter("---\ntitle: x\n");
+		expect(issues.some((i) => /not closed/i.test(i.message))).toBe(true);
+	});
+
+	it("errors on invalid status", () => {
+		const content = valid.replace("status: todo", "status: nope");
+		const issues = validateFrontmatter(content);
+		const statusIssue = issues.find((i) => i.field === "status");
+		expect(statusIssue).toBeDefined();
+		expect(statusIssue!.severity).toBe("error");
+		expect(statusIssue!.range.startLine).toBeGreaterThan(0);
+	});
+
+	it("errors on invalid priority", () => {
+		const content = valid.replace("priority: high", "priority: urgent");
+		const issues = validateFrontmatter(content);
+		expect(issues.some((i) => i.field === "priority")).toBe(true);
+	});
+
+	it("errors when id is missing", () => {
+		const content = valid.replace(
+			'id: "550e8400-e29b-41d4-a716-446655440000"\n',
+			"",
+		);
+		const issues = validateFrontmatter(content);
+		expect(
+			issues.some((i) => i.field === "id" && /missing/i.test(i.message)),
+		).toBe(true);
+	});
+
+	it("errors when title exceeds max length", () => {
+		const long = "x".repeat(MAX_TASK_TITLE_LENGTH + 1);
+		const content = valid.replace("title: Fix login", `title: ${long}`);
+		const issues = validateFrontmatter(content);
+		const titleIssue = issues.find((i) => i.field === "title");
+		expect(titleIssue).toBeDefined();
+		expect(titleIssue!.message).toMatch(String(MAX_TASK_TITLE_LENGTH));
+	});
+
+	it("errors when tags is not an array", () => {
+		const content = valid.replace("tags: [bug]", "tags: bug");
+		const issues = validateFrontmatter(content);
+		expect(issues.some((i) => i.field === "tags")).toBe(true);
+	});
+
+	it("warns on unknown fields", () => {
+		const content = valid.replace(
+			"updated: 2026-07-12T10:00:00.000Z",
+			"updated: 2026-07-12T10:00:00.000Z\nfoo: bar",
+		);
+		const issues = validateFrontmatter(content);
+		const unknown = issues.find((i) => i.field === "foo");
+		expect(unknown).toBeDefined();
+		expect(unknown!.severity).toBe("warning");
+	});
+
+	it("errors on broken YAML", () => {
+		const content = `---
+title: [unterminated
+---
+`;
+		const issues = validateFrontmatter(content);
+		expect(issues.some((i) => /yaml/i.test(i.message))).toBe(true);
+	});
+});