refactor(errors): surface 57 deferred catch-and-swallow sites via logger

The earlier sweep cleaned the hot path (worker/runtime/automation/api-
server/ipc core — 59 sites). This pass finishes the deferred long tail:
main/* services, database/* CRUD modules, api-server/* routes, ipc-*
handlers, thread-integration, automation helpers, browser, skills.

Default strategy: catch (error) { logger.warn("[module] context:", ...) }
— preserve current behavior, make the failure visible instead of
silently hidden. Widened 3 logger interface signatures to include warn
where callers only passed info/error previously (thread-helpers,
host-environment-service, ipc-domain-common).

Legitimate boundaries left intact: JSON.parse on untrusted input, DNS
resolver no-records paths, explicit safe* helpers (safeJson, parseJson,
parseTriggerDetail), URL-parse predicates, and `<unserialisable>`
fallbacks inside the prompt-builder summarisers. Each kept catch now
either has a reason in context or is a documented safe* helper.

Tests adjusted only where test-constructed no-op loggers needed a warn
stub (message-dispatch, company-mode-switch, ipc-agent-graph-handlers).

With the earlier pass, AgentCompany no longer has silently-swallowing
catch blocks in main-process or renderer business code.

src/main/task-quality-gates.ts

@@ -5,6 +5,7 @@
  * minimum description quality, acceptance criteria, and capability matching.
  */
 
+import log from "electron-log/main.js";
 import type { DesktopEvent } from "@shared/types";
 import type { AppDatabase } from "@main/database";
 import type { NotificationOptions } from "@main/notification-service";
@@ -279,8 +280,8 @@ export function sweepStaleReviews(
           detail: "Auto-approved by review timeout escalation",
           actor: "system",
         });
-      } catch {
-        // Already decided (race condition with manual approval) -- skip silently (Pitfall 3)
+      } catch (err) {
+        log.warn(`[task-quality-gates] resolveApprovalDecision failed for approval ${pendingApproval.id} (likely already decided):`, err instanceof Error ? err.message : String(err));
       }
     }
 
@@ -288,8 +289,8 @@ export function sweepStaleReviews(
     try {
       deps.db.advanceTaskStatus(task.id, "done", "Auto-advanced: review timeout exceeded 30 minutes.");
       deps.handleTaskStatusChange(task.id, companyId, "in_review", "done");
-    } catch {
-      // Task may have been updated by manual action
+    } catch (err) {
+      log.warn(`[task-quality-gates] advanceTaskStatus failed for task ${task.id}:`, err instanceof Error ? err.message : String(err));
     }
 
     escalatedCount++;