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/llm-service.ts

@@ -488,7 +488,9 @@ class SaasLLMAdapter implements LLMServiceAdapter {
         result.tokensUsed.output,
         { latencyMs, success: true, connectionMode: 'saas' },
       );
-    } catch { /* non-blocking */ }
+    } catch (e) {
+      log.debug('Failed to record LLM telemetry', { error: e });
+    }
 
     return result;
   }
@@ -500,7 +502,8 @@ class SaasLLMAdapter implements LLMServiceAdapter {
       const mode = localStorage.getItem('zclaw-connection-mode');
       const saasUrl = localStorage.getItem('zclaw-saas-url');
       return mode === 'saas' && !!saasUrl;
-    } catch {
+    } catch (e) {
+      log.debug('Failed to check SaaS adapter availability', { error: e });
       return false;
     }
   }
@@ -556,8 +559,8 @@ export function loadConfig(): LLMConfig {
     if (saved) {
       return JSON.parse(saved);
     }
-  } catch {
-    // Ignore parse errors
+  } catch (e) {
+    log.debug('Failed to parse LLM config', { error: e });
   }
 
   // Default to gateway (ZCLAW passthrough) for L4 self-evolution
@@ -661,7 +664,8 @@ function loadPromptCache(): Record<string, CachedPrompt> {
   try {
     const raw = localStorage.getItem(PROMPT_CACHE_KEY);
     return raw ? JSON.parse(raw) : {};
-  } catch {
+  } catch (e) {
+    log.debug('Failed to parse prompt cache', { error: e });
     return {};
   }
 }
@@ -827,8 +831,8 @@ function trackLLMCall(
         connectionMode: adapter.getProvider() === 'saas' ? 'saas' : 'tauri',
       },
     );
-  } catch {
-    // telemetry-collector may not be available (e.g., SSR)
+  } catch (e) {
+    log.debug('Telemetry recording failed (SSR or unavailable)', { error: e });
   }
 }