diff --git a/PERFORMANCE_AUDIT.md b/PERFORMANCE_AUDIT.md
index f8114fd..539eeab 100644
--- a/PERFORMANCE_AUDIT.md
+++ b/PERFORMANCE_AUDIT.md
@@ -57,7 +57,7 @@ This critical area for a background desktop app is fully resolved.
 **Status: 🟢 Excellent**
 
 **Linting:**
-* `npm run lint` yields 0 errors and only 13 minimal warnings (`no-empty`, `no-console`, and some remaining `any` types that are safe or intentional). The majority of the codebase is now strongly typed.
+* `npm run lint` yields 0 errors and only 8 minimal warnings (`no-empty`, `no-console`, and some remaining `any` types that are safe or intentional). The majority of the codebase is now strongly typed.
 
 **Electron-Builder:**
 * `asar` packaging is efficiently enabled.
diff --git a/README.md b/README.md
index aa452f6..c050159 100644
--- a/README.md
+++ b/README.md
@@ -98,6 +98,15 @@ PaperCache brings AI right into your note — no subscription, no middleman. You
 
 ---
 
+## Support
+
+If you find PaperCache useful, consider buying me a coffee to support its ongoing development!
+
+[![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/thevariable)
+
+---
+
 ## License
 
 MIT License.
+
diff --git a/src/Settings.test.tsx b/src/Settings.test.tsx
index 8d85536..ba72ca1 100644
--- a/src/Settings.test.tsx
+++ b/src/Settings.test.tsx
@@ -30,7 +30,9 @@ describe('Settings Component', () => {
   })
 
   it('loads API key status from IPC', async () => {
-    ;(window.electronAPI.getApiKeyStatus as any).mockResolvedValue(true)
+    ;(
+      window.electronAPI.getApiKeyStatus as unknown as { mockResolvedValue: (v: boolean) => void }
+    ).mockResolvedValue(true)
     await act(async () => {
       render(<Settings />)
     })
diff --git a/src/components/Editor.tsx b/src/components/Editor.tsx
index 1f34657..506cc9c 100644
--- a/src/components/Editor.tsx
+++ b/src/components/Editor.tsx
@@ -3,7 +3,7 @@ import CodeMirror from '@uiw/react-codemirror'
 import { ViewUpdate } from '@codemirror/view'
 import { useAppStore } from '../store/useAppStore'
 import { useSettingsStore } from '../store/useSettingsStore'
-import { MathEvaluator } from '../lib/editor/MathEvaluator'
+
 import { useEditorExtensions } from '../lib/editor/extensions'
 
 import { type TransactionSpec } from '@codemirror/state'
@@ -54,14 +54,17 @@ export const Editor = forwardRef<EditorRef>((_props, ref) => {
 
       if (viewUpdate?.transactions?.some((tr) => tr.docChanged)) {
         if (editorRef.current?.view) {
-          MathEvaluator.triggerMathEvaluation(editorRef.current.view)
+          const view = editorRef.current.view
+          import('../lib/editor/MathEvaluator').then((m) => {
+            m.MathEvaluator.triggerMathEvaluation(view)
+          })
         }
       }
     },
     [currentNoteIndex, setNotes]
   )
 
-  const extensions = useEditorExtensions(handleEditorChange)
+  const extensions = useEditorExtensions()
 
   useEffect(() => {
     const handleWindowFocus = () => {
diff --git a/src/components/NoteTitleBar.tsx b/src/components/NoteTitleBar.tsx
index 92bb0d5..d4c58f5 100644
--- a/src/components/NoteTitleBar.tsx
+++ b/src/components/NoteTitleBar.tsx
@@ -35,6 +35,7 @@ export function NoteTitleBar() {
           prev.map((n) => (n.id === activeNote.id ? { ...n, content: newContent } : n))
         )
       } catch (e) {
+        // eslint-disable-next-line no-console
         console.error('Failed to save note', e)
       }
     } else {
@@ -50,6 +51,7 @@ export function NoteTitleBar() {
           setNotes((prev) => prev.map((n) => (n.id === activeNote.id ? { ...n, id: newId } : n)))
         }
       } catch (e) {
+        // eslint-disable-next-line no-console
         console.error('Failed to rename note', e)
       }
     }
diff --git a/src/hooks/useReminders.test.ts b/src/hooks/useReminders.test.ts
index 8f2bfc5..08717f5 100644
--- a/src/hooks/useReminders.test.ts
+++ b/src/hooks/useReminders.test.ts
@@ -19,7 +19,7 @@ describe('useReminders', () => {
       window.electronAPI = {
         onPowerSuspend: vi.fn().mockReturnValue(vi.fn()),
         onPowerResume: vi.fn().mockReturnValue(vi.fn()),
-      } as Partial<Window['electronAPI']> as any
+      } as unknown as Window['electronAPI']
     }
 
     // Clear localStorage
diff --git a/src/hooks/useReminders.ts b/src/hooks/useReminders.ts
index 3b95fe1..c9ff1d1 100644
--- a/src/hooks/useReminders.ts
+++ b/src/hooks/useReminders.ts
@@ -37,6 +37,7 @@ function handleDueReminders(notes: Note[]) {
   for (const r of allReminders) {
     if (now >= r.dueAt.getTime()) {
       if (!notified.has(r.key)) {
+        // eslint-disable-next-line no-console
         console.log('Triggering OS notification for:', r.label)
         new Notification('PaperCache Reminder', {
           body: r.label,
diff --git a/src/lib/editor/extensions.ts b/src/lib/editor/extensions.ts
index b173e5b..e1493cb 100644
--- a/src/lib/editor/extensions.ts
+++ b/src/lib/editor/extensions.ts
@@ -30,7 +30,7 @@ const handleDeleteNote = () => {
   return true
 }
 
-export function useEditorExtensions(handleEditorChange: (val: string) => void) {
+export function useEditorExtensions() {
   const { apiBaseUrl, apiModel, aiSystemPrompt } = useAIStore()
 
   return useMemo(
@@ -236,6 +236,6 @@ export function useEditorExtensions(handleEditorChange: (val: string) => void) {
         },
       }),
     ],
-    [apiBaseUrl, apiModel, aiSystemPrompt, handleEditorChange]
+    [apiBaseUrl, apiModel, aiSystemPrompt]
   )
 }
diff --git a/src/utils.ts b/src/utils.ts
index 5758e31..057646d 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -3,7 +3,9 @@ export const getFolderColor = (str: string): string => {
   let colors: Record<string, string> = {}
   try {
     colors = JSON.parse(localStorage.getItem('papercache-folder-colors') || '{}')
-  } catch {}
+  } catch {
+    /* ignore */
+  }
 
   if (colors[str]) return colors[str]