fix(cli): reject negative and fractional count/pagination flags in Danish portal CLIs (#191)

Bare z.coerce.number() accepted negative and fractional values for count/pagination flags, and slice(0, limit) with a negative limit silently dropped trailing results instead of erroring. Tightens the schemas to .int().min(1) across all four Danish portal CLIs (including jobnet occupations --per-page) with network-free validation tests.

By @ayobamiseun.

.agents/skills/jobdanmark-search/cli/tests/cli-flag-validation.test.ts

@@ -0,0 +1,60 @@
+import { describe, expect, test } from "bun:test";
+import { runCLI } from "./helpers";
+
+// All cases fail schema validation (or the required-flag guard) before any
+// network request, so the suite is network-free. Regression context: a bare
+// z.coerce.number() accepted --limit=-1, and slice(0, -1) then silently
+// dropped the last result instead of erroring.
+
+function expectValidationError(result: { exitCode: number; stdout: string; stderr: string }, option: string) {
+  expect(result.exitCode).toBe(1);
+  expect(result.stdout).toBe("");
+  const error = JSON.parse(result.stderr);
+  expect(error.ok).toBe(false);
+  expect(error.error.kind).toBe("validation");
+  expect(error.error.option).toBe(option);
+}
+
+describe("Jobdanmark CLI flag validation", () => {
+  test("search --limit=-1 is rejected instead of silently dropping the last result", async () => {
+    const result = await runCLI(["search", "--limit=-1"]);
+    expectValidationError(result, "limit");
+    expect(JSON.parse(result.stderr).error.message).toContain("greater than or equal to 1");
+  });
+
+  test("search --page=0 is rejected on the 1-indexed portal", async () => {
+    const result = await runCLI(["search", "--page=0"]);
+    expectValidationError(result, "page");
+  });
+
+  test("search --limit=1.5 is rejected as non-integer", async () => {
+    const result = await runCLI(["search", "--limit=1.5"]);
+    expectValidationError(result, "limit");
+    expect(JSON.parse(result.stderr).error.message).toContain("Expected integer");
+  });
+
+  test("categories --limit=-1 is rejected", async () => {
+    const result = await runCLI(["categories", "--limit=-1"]);
+    expectValidationError(result, "limit");
+  });
+
+  test("locations --limit=-1 is rejected", async () => {
+    const result = await runCLI(["locations", "--query", "test", "--limit=-1"]);
+    expectValidationError(result, "limit");
+  });
+
+  test("autocomplete --limit=-1 is rejected", async () => {
+    const result = await runCLI(["autocomplete", "--query", "test", "--limit=-1"]);
+    expectValidationError(result, "limit");
+  });
+
+  test("valid numeric flags pass schema validation (proven offline via the required-flag guard)", async () => {
+    const result = await runCLI(["autocomplete", "--limit=3"]);
+
+    expect(result.exitCode).toBe(1);
+    expect(JSON.parse(result.stderr)).toEqual({
+      error: "--query is required",
+      code: "MISSING_REQUIRED",
+    });
+  });
+});