chore(web): fix remaining real Codacy findings (2 of 6)

- htmx-config.js: two more unused catch bindings dropped (optional catch
  binding), matching the earlier fix.
- app-early.js: second forEach arrow (the stub updatePluginTabs copy)
  braced so the callback no longer returns tab.remove()'s value.

The other 4 findings ("Non-serializable expression must be wrapped with
$(...)") are deliberately NOT "fixed": that rule belongs to a
browser-automation (WebdriverIO-style) lint context and is misfiring on
ordinary arrow-function constants. Converting them to function
declarations would look compliant but BREAK the code - all four arrows
intentionally capture the enclosing Alpine component's `this` for the
stub-to-full enhancement logic. The right remedy is disabling that
pattern for this repo in Codacy's Code Patterns settings (or dismissing
the four findings), not a code change.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KEZK1P1Q1fu5pcuVrkrCFZ

web_interface/static/v3/js/app-early.js

@@ -322,7 +322,7 @@
                             }
                             
                             // Clear existing plugin tabs (except Plugin Manager)
-                            existingTabs.forEach(tab => tab.remove());
+                            existingTabs.forEach(tab => { tab.remove(); });
                             debugLog('[STUB] updatePluginTabs: Cleared', existingTabs.length, 'existing tabs');
                             
                             // Add tabs for each installed plugin

web_interface/static/v3/js/htmx-config.js

@@ -182,11 +182,11 @@
                                                 (document.head || document.body).appendChild(newScript);
                                             }
                                         }
-                                    } catch (e) {
+                                    } catch {
                                         // Silently ignore script execution errors
                                     }
                                 });
-                            } catch (e) {
+                            } catch {
                                 // Silently ignore errors in script processing
                             }
                         }