refactor(desktop): split kernel_commands/pipeline_commands into modules, add SaaS client libs and gateway modules

Split monolithic kernel_commands.rs (2185 lines) and pipeline_commands.rs (1391 lines)
into focused sub-modules under kernel_commands/ and pipeline_commands/ directories.
Add gateway module (commands, config, io, runtime), health_check, and 15 new
TypeScript client libraries for SaaS relay, auth, admin, telemetry, and kernel
sub-systems (a2a, agent, chat, hands, skills, triggers).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src/lib/memory-extractor.ts

@@ -201,7 +201,8 @@ export class MemoryExtractor {
               conversation_id: conversationId,
             });
             saved++;
-          } catch {
+          } catch (e) {
+            log.debug('Failed to save memory item', { error: e });
             skipped++;
           }
         }
@@ -406,8 +407,8 @@ export class MemoryExtractor {
           importance: Math.max(1, Math.min(10, Number(item.importance))),
           tags: Array.isArray(item.tags) ? item.tags.map(String) : [],
         }));
-    } catch {
-      log.warn('Failed to parse LLM extraction response');
+    } catch (e) {
+      log.warn('Failed to parse LLM extraction response', { error: e });
       return [];
     }
   }