refactor: cut cyclomatic complexity of five hot spots and pin their behavior with tests

Risk labels, menu callback parsing, settings callbacks, table cell width and
markdown link targets now use tables and small helpers (CC <= 10).

tests/menu.test.ts

@@ -2394,3 +2394,45 @@ test("Settings menu marks one-line on/off checkbox controls symmetrically", () =
     ],
   );
 });
+
+test("Menu callback parser maps every status alias and model action, and ignores the rest", () => {
+  for (const action of ["model", "thinking", "queue", "settings"] as const) {
+    for (const prefix of ["menu", "status"]) {
+      assert.deepEqual(parseTelegramMenuCallbackAction(`${prefix}:${action}`), {
+        kind: "status",
+        action,
+      });
+    }
+  }
+  for (const action of [
+    "noop",
+    "scope",
+    "page",
+    "pages",
+    "open",
+    "pick",
+    "pick-selected",
+    "scope-enable",
+    "scope-disable",
+    "scope-toggle",
+  ]) {
+    assert.deepEqual(parseTelegramMenuCallbackAction(`model:${action}:7`), {
+      kind: "model",
+      action,
+      value: "7",
+    });
+  }
+  assert.deepEqual(parseTelegramMenuCallbackAction("thinking:set:"), {
+    kind: "thinking:set",
+    level: "",
+  });
+  assert.deepEqual(parseTelegramMenuCallbackAction("model:unknown:1"), {
+    kind: "ignore",
+  });
+  assert.deepEqual(parseTelegramMenuCallbackAction("menu:other"), {
+    kind: "ignore",
+  });
+  assert.deepEqual(parseTelegramMenuCallbackAction(undefined), {
+    kind: "ignore",
+  });
+});