feat: add tui recovery state machine

packages/core/src/config.test.ts

@@ -50,6 +50,26 @@ describe("config loader", () => {
     });
 
     expect(config.backends).toContainEqual({ id: "fake", enabled: true });
+    expect(config.SESSION_MAX_HUNG_MS).toBe(20 * 60 * 1000);
+  });
+
+  it("loads configurable session hung timeout", () => {
+    const root = mkdtempSync(join(tmpdir(), "devflow-config-"));
+    const workspace = join(root, "workspace");
+    mkdirSync(workspace);
+
+    const config = loadConfigFromSources({
+      cwd: root,
+      env: {
+        DATABASE_URL: "postgres://devflow:devflow@localhost:5432/devflow",
+        WORKSPACE_ROOT: workspace,
+        LOG_LEVEL: "info",
+        TEMPORAL_ADDRESS: "localhost:7233",
+        SESSION_MAX_HUNG_MS: "2500",
+      },
+    });
+
+    expect(config.SESSION_MAX_HUNG_MS).toBe(2500);
   });
 
   it("resolves backend binaries from PATH during config load", () => {

packages/core/src/config.ts

@@ -22,6 +22,11 @@ const RawConfigSchema = z.object({
   LOG_LEVEL: LogLevel,
   TEMPORAL_ADDRESS: z.string().min(1),
   MAX_CONCURRENT_RUNS: z.coerce.number().int().positive().default(4),
+  SESSION_MAX_HUNG_MS: z.coerce
+    .number()
+    .int()
+    .positive()
+    .default(20 * 60 * 1000),
   backends: z.array(BackendConfig).default([{ id: "fake", enabled: true }]),
 });