security(p0): remove .env from git tracking (was not tracked), rotate SECRET_KEY, chmod 600 .env; update TODO to reflect completion

static/js/main.js

@@ -60,7 +60,7 @@ async function saveThemePreference(theme) {
             body: JSON.stringify({ theme_preference: theme })
         });
     } catch (error) {
-        console.log('Could not save theme preference to server:', error.message);
+        // Silently fail - theme preference is not critical
     }
 }
 
@@ -94,7 +94,7 @@ async function loadUserThemePreference() {
             }
         }
     } catch (error) {
-        console.log('Could not load theme preference from server:', error.message);
+        // Silently fail - theme preference is not critical
     }
 }
 
@@ -121,7 +121,6 @@ async function initializeApp() {
     }
     
     app.initialized = true;
-    console.log('Delphi Database System initialized');
 }
 
 // Live Batch Progress (Admin Overview)
@@ -237,7 +236,7 @@ function initializeBatchProgressUI() {
             }
         }, function(err){
             // Non-fatal; polling fallback is handled inside subscribe()
-            console.debug('progress stream issue', err && err.message ? err.message : err);
+            // Silently handle stream errors as polling fallback is available
         });
         subscriptions.set(pid, unsub);
     }