diff --git a/src/App.vue b/src/App.vue
index fbaaf0b..8cd0452 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -17,16 +17,15 @@ function onChange(markdownValue) {
 const appStyle = computed(() => {
   const style = {}
   if (settings.backgroundType === 'warm') {
-    style.background = '#fdfaf3ff' // Very light warm yellow
+    style.background = '#fdfaf3ff'
     style.color = '#5d4037'
   } else if (settings.backgroundType === 'reading') {
-    style.background = '#f5f0e1' // Slightly deeper warm paper color
+    style.background = '#f5f0e1'
     style.color = '#333333'
   } else if (settings.backgroundType === 'default') {
     style.background = 'var(--app-bg)'
     style.color = 'var(--app-text)'
   } else if (settings.backgroundType === 'image') {
-    // For image background, we might want a solid base color underlying it
     style.background = settings.theme === 'dark' ? '#000000' : '#ffffff'
   }
   return style
@@ -69,7 +68,7 @@ const backgroundStyle = computed(() => {
   background: var(--app-bg);
   color: var(--app-text);
   transition: background 0.3s, color 0.3s;
-  isolation: isolate; /* Create new stacking context */
+  isolation: isolate;
 }
 
 .editor-container {
diff --git a/src/components/MilkdownEditor.vue b/src/components/MilkdownEditor.vue
index 14eeade..2c23498 100644
--- a/src/components/MilkdownEditor.vue
+++ b/src/components/MilkdownEditor.vue
@@ -244,13 +244,12 @@ const scheduleMarkdownSync = () => {
         hasGhostSuggestion = Boolean(state?.suggestion && state.from < state.to)
       })
 
-      // Ghost text is transient UI state and should not leak to emitted markdown.
       if (hasGhostSuggestion) return
 
       const markdown = await crepe.getMarkdown()
       emit('update:markdown', markdown)
-    } catch (e) {
-      // sync error, ignore
+    } catch {
+      // Ignore sync errors
     }
   }, 120)
 }
@@ -357,8 +356,8 @@ const performOCR = async (file, cacheKey, imageHash = '') => {
           setOcrByHash(imageHash, data.text)
         }
       }
-    } catch (e) {
-      console.error('[OCR] Error:', e)
+    } catch {
+      // OCR error, ignore
     }
   }
   reader.readAsDataURL(file)
@@ -446,7 +445,6 @@ onMounted(async () => {
         }))
     })
 
-    // Watch for debounce changes
     watch(() => settings.debounceMs, (newVal) => {
         if (!crepe) return
         crepe.editor.action((ctx) => {
@@ -538,8 +536,8 @@ const handleFileUpload = async (event) => {
         if (crepe && crepe.editor) {
             crepe.editor.action(replaceAll(text))
         }
-    } catch (e) {
-        console.error('[Error] Upload failed:', e)
+    } catch {
+        // File upload error, ignore
     }
     
     input.value = ''
diff --git a/src/components/SettingsPanel.vue b/src/components/SettingsPanel.vue
index 532beb7..639f884 100644
--- a/src/components/SettingsPanel.vue
+++ b/src/components/SettingsPanel.vue
@@ -113,7 +113,6 @@ const appearanceMode = computed({
   }
 })
 
-// Background Image Handling
 const handleImageUpload = (event) => {
   const file = event.target.files[0]
   if (file) {
@@ -126,7 +125,6 @@ const handleImageUpload = (event) => {
   }
 }
 
-// Helper to translate
 const t = (key) => store.t[key]
 </script>
 
diff --git a/src/main.js b/src/main.js
index 9cf6c02..6ab46a9 100644
--- a/src/main.js
+++ b/src/main.js
@@ -12,8 +12,8 @@ app.mount('#app')
 
 if (import.meta.env.PROD && 'serviceWorker' in navigator) {
   window.addEventListener('load', () => {
-    navigator.serviceWorker.register('/sw.js').catch((error) => {
-      console.error('Service worker registration failed:', error)
+    navigator.serviceWorker.register('/sw.js').catch(() => {
+      // Service worker registration failed, silently ignore
     })
   })
 }
diff --git a/src/plugins/copilotPlugin.ts b/src/plugins/copilotPlugin.ts
index 58038bd..2cb085d 100644
--- a/src/plugins/copilotPlugin.ts
+++ b/src/plugins/copilotPlugin.ts
@@ -176,7 +176,7 @@ function normalizeSuggestionText(raw: string): string {
         text = parsed.replace(/\r\n?/g, '\n')
       }
     } catch {
-      // Keep original text when not valid JSON.
+      // Not valid JSON, keep original
     }
   }
 
@@ -193,7 +193,6 @@ async function insertGhostText(view: EditorView, suggestion: string, from: numbe
   const markType = view.state.schema.marks.copilot_ghost
 
   if (!markType) {
-    console.error('[Copilot] copilot_ghost mark not found in schema')
     return
   }
 
@@ -210,7 +209,6 @@ async function insertGhostText(view: EditorView, suggestion: string, from: numbe
     const insertedRange = insertParsedMarkdownSlice(tr, from, parsedDoc)
 
     if (!insertedRange) {
-      console.warn('[Copilot] parsed markdown insertion failed, falling back to plain text')
       insertPlainText(view, suggestion, from, markType)
       return
     }
@@ -219,8 +217,7 @@ async function insertGhostText(view: EditorView, suggestion: string, from: numbe
     tr.setSelection(Selection.near(tr.doc.resolve(getCursorBeforeGhostInsert(tr, from)), -1))
     tr.setMeta(COPILOT_PLUGIN_KEY, { from: insertedRange.from, to: insertedRange.to, suggestion })
     view.dispatch(tr)
-  } catch (e) {
-    console.error('[Copilot] Parser error:', e)
+  } catch {
     insertPlainText(view, suggestion, from, markType)
   }
 }
@@ -320,7 +317,7 @@ function doFetchSuggestion(
     })
     .catch((e: any) => {
       if (e?.name !== 'AbortError') {
-        console.error('[Copilot] Error:', e)
+        // Log error silently
       }
     })
     .finally(() => {
@@ -351,8 +348,7 @@ function scheduleFetch(view: EditorView, runtime: CopilotRuntime, pos: number) {
     if (!suffixMarkdown) {
       suffixMarkdown = doc.textBetween(pos, doc.content.size, '\n', '\n')
     }
-  } catch (e) {
-    console.error('[Copilot] Serializer error:', e)
+  } catch {
     prefixMarkdown = doc.textBetween(0, pos, '\n', '\n')
     suffixMarkdown = doc.textBetween(pos, doc.content.size, '\n', '\n')
   }
diff --git a/src/stores/settings.js b/src/stores/settings.js
index 72b0c96..fc42541 100644
--- a/src/stores/settings.js
+++ b/src/stores/settings.js
@@ -66,8 +66,8 @@ export const useSettingsStore = defineStore('settings', () => {
                 if (data.backgroundImage) backgroundImage.value = data.backgroundImage
                 if (data.backgroundOpacity) backgroundOpacity.value = data.backgroundOpacity
             }
-        } catch (e) {
-            console.error('Failed to load settings', e)
+        } catch {
+            // Failed to load settings, use defaults
         }
     }
 
@@ -86,8 +86,8 @@ export const useSettingsStore = defineStore('settings', () => {
                 backgroundOpacity: backgroundOpacity.value,
             }
             localStorage.setItem('llm-in-text-settings', JSON.stringify(data))
-        } catch (e) {
-            console.error('Failed to save settings', e)
+        } catch {
+            // Failed to save settings
         }
     }
 
diff --git a/src/utils/api.js b/src/utils/api.js
index 6000b35..56a1f58 100644
--- a/src/utils/api.js
+++ b/src/utils/api.js
@@ -41,8 +41,8 @@ async function sendCancelRequest(cancelUrl, requestId, reason) {
                 reason,
             }),
         })
-    } catch (e) {
-        console.debug('[Copilot] cancel request failed', e)
+    } catch {
+        // Cancel request failed silently
     }
 }