refactor(config): unify streaming config across channels

src/commands/doctor-legacy-config.e2e.test.ts

@@ -145,4 +145,81 @@ describe("normalizeLegacyConfigValues", () => {
       "Moved channels.discord.accounts.work.dm.allowFrom → channels.discord.accounts.work.allowFrom.",
     ]);
   });
+
+  it("migrates Discord streaming boolean alias to streaming enum", () => {
+    const res = normalizeLegacyConfigValues({
+      channels: {
+        discord: {
+          streaming: true,
+          accounts: {
+            work: {
+              streaming: false,
+            },
+          },
+        },
+      },
+    });
+
+    expect(res.config.channels?.discord?.streaming).toBe("partial");
+    expect(res.config.channels?.discord?.streamMode).toBeUndefined();
+    expect(res.config.channels?.discord?.accounts?.work?.streaming).toBe("off");
+    expect(res.config.channels?.discord?.accounts?.work?.streamMode).toBeUndefined();
+    expect(res.changes).toEqual([
+      "Normalized channels.discord.streaming boolean → enum (partial).",
+      "Normalized channels.discord.accounts.work.streaming boolean → enum (off).",
+    ]);
+  });
+
+  it("migrates Discord legacy streamMode into streaming enum", () => {
+    const res = normalizeLegacyConfigValues({
+      channels: {
+        discord: {
+          streaming: false,
+          streamMode: "block",
+        },
+      },
+    });
+
+    expect(res.config.channels?.discord?.streaming).toBe("block");
+    expect(res.config.channels?.discord?.streamMode).toBeUndefined();
+    expect(res.changes).toEqual([
+      "Moved channels.discord.streamMode → channels.discord.streaming (block).",
+      "Normalized channels.discord.streaming boolean → enum (block).",
+    ]);
+  });
+
+  it("migrates Telegram streamMode into streaming enum", () => {
+    const res = normalizeLegacyConfigValues({
+      channels: {
+        telegram: {
+          streamMode: "block",
+        },
+      },
+    });
+
+    expect(res.config.channels?.telegram?.streaming).toBe("block");
+    expect(res.config.channels?.telegram?.streamMode).toBeUndefined();
+    expect(res.changes).toEqual([
+      "Moved channels.telegram.streamMode → channels.telegram.streaming (block).",
+    ]);
+  });
+
+  it("migrates Slack legacy streaming keys to unified config", () => {
+    const res = normalizeLegacyConfigValues({
+      channels: {
+        slack: {
+          streaming: false,
+          streamMode: "status_final",
+        },
+      },
+    });
+
+    expect(res.config.channels?.slack?.streaming).toBe("progress");
+    expect(res.config.channels?.slack?.nativeStreaming).toBe(false);
+    expect(res.config.channels?.slack?.streamMode).toBeUndefined();
+    expect(res.changes).toEqual([
+      "Moved channels.slack.streamMode → channels.slack.streaming (progress).",
+      "Moved channels.slack.streaming (boolean) → channels.slack.nativeStreaming (false).",
+    ]);
+  });
 });