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/security-utils.ts

@@ -12,6 +12,10 @@
  * - Content Security Policy helpers
  */
 
+import { createLogger } from './logger';
+
+const logger = createLogger('SecurityUtils');
+
 // ============================================================================
 // HTML Sanitization
 // ============================================================================
@@ -232,7 +236,8 @@ export function validateUrl(
     }
 
     return parsed.toString();
-  } catch {
+  } catch (e) {
+    logger.debug('URL validation failed', { error: e });
     return null;
   }
 }
@@ -341,7 +346,8 @@ export function validatePath(
           return null;
         }
         normalized = resolved;
-      } catch {
+      } catch (e) {
+        logger.debug('Path resolution failed', { error: e });
         return null;
       }
     }
@@ -553,7 +559,8 @@ export function sanitizeJson<T = unknown>(json: string): T | null {
     }
 
     return parsed as T;
-  } catch {
+  } catch (e) {
+    logger.debug('JSON sanitize parse failed', { error: e });
     return null;
   }
 }