fix: return "dispatched" after doctor heal to prevent session race (#1580) (#1610)

After dispatchDoctorHeal fires pi.sendMessage({ triggerTurn: true }),
the function fell through to return "continue". The auto-loop treated
"continue" as "proceed to next unit", called newSession() while the
session manager was still processing the heal turn, and the 30s timeout
killed auto-mode.

Returning "dispatched" causes the auto-loop to break, letting the heal
turn complete and trigger its own handleAgentEnd to resume the loop.

Closes #1580

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/resources/extensions/gsd/auto-post-unit.ts

@@ -194,6 +194,7 @@ export async function postUnitPreVerification(pctx: PostUnitContext, opts?: PreV
             const reportText = formatDoctorReport(report, { scope: doctorScope, includeWarnings: true });
             const structuredIssues = formatDoctorIssuesForPrompt(actionable);
             dispatchDoctorHeal(pi, doctorScope, reportText, structuredIssues);
+            return "dispatched";
           } catch (e) {
             debugLog("postUnit", { phase: "doctor-heal-dispatch", error: String(e) });
           }