fix(security): make allowFrom id-only by default with dangerous name opt-in (#24907)

* fix(channels): default allowFrom to id-only; add dangerous name opt-in

* docs(security): align channel allowFrom docs with id-only default

src/security/audit.test.ts

@@ -1500,6 +1500,43 @@ describe("security audit", () => {
     });
   });
 
+  it("marks Discord name-based allowlists as break-glass when dangerous matching is enabled", async () => {
+    await withChannelSecurityStateDir(async () => {
+      const cfg: OpenClawConfig = {
+        channels: {
+          discord: {
+            enabled: true,
+            token: "t",
+            dangerouslyAllowNameMatching: true,
+            allowFrom: ["Alice#1234"],
+          },
+        },
+      };
+
+      const res = await runSecurityAudit({
+        config: cfg,
+        includeFilesystem: false,
+        includeChannelSecurity: true,
+        plugins: [discordPlugin],
+      });
+
+      const finding = res.findings.find(
+        (entry) => entry.checkId === "channels.discord.allowFrom.name_based_entries",
+      );
+      expect(finding).toBeDefined();
+      expect(finding?.severity).toBe("info");
+      expect(finding?.detail).toContain("out-of-scope");
+      expect(res.findings).toEqual(
+        expect.arrayContaining([
+          expect.objectContaining({
+            checkId: "channels.discord.allowFrom.dangerous_name_matching_enabled",
+            severity: "info",
+          }),
+        ]),
+      );
+    });
+  });
+
   it("does not warn when Discord allowlists use ID-style entries only", async () => {
     await withChannelSecurityStateDir(async () => {
       const cfg: OpenClawConfig = {