diff --git a/src/lib/stores/settings.svelte.ts b/src/lib/stores/settings.svelte.ts
index 99399d5..7358782 100644
--- a/src/lib/stores/settings.svelte.ts
+++ b/src/lib/stores/settings.svelte.ts
@@ -52,7 +52,7 @@ export type LanguageCode =
 	| 'id' // Indonesian
 	| 'tr'; // Turkish
 
-export const SUPPORTED_LANGUAGES: { code: LanguageCode; name: string; nativeName: string }[] = [
+const SUPPORTED_LANGUAGES: { code: LanguageCode; name: string; nativeName: string }[] = [
 	{ code: 'cs', name: 'Czech', nativeName: 'Čeština' },
 	{ code: 'da', name: 'Danish', nativeName: 'Dansk' },
 	{ code: 'nl', name: 'Dutch', nativeName: 'Nederlands' },
@@ -81,9 +81,9 @@ export const SUPPORTED_LANGUAGES: { code: LanguageCode; name: string; nativeName
 	{ code: 'zh-TW', name: 'Chinese (Traditional)', nativeName: '繁體中文' },
 ];
 
-export const SUPPORTED_LANGUAGE_CODES: readonly LanguageCode[] = SUPPORTED_LANGUAGES.map((entry) => entry.code);
+const SUPPORTED_LANGUAGE_CODES: readonly LanguageCode[] = SUPPORTED_LANGUAGES.map((entry) => entry.code);
 
-export function isSupportedLanguage(value: unknown): value is LanguageCode {
+function isSupportedLanguage(value: unknown): value is LanguageCode {
 	return typeof value === 'string' && (SUPPORTED_LANGUAGE_CODES as readonly string[]).includes(value);
 }
 
@@ -305,7 +305,7 @@ export function writeStoredSetting(key: string, value: string | null): boolean {
 }
 
 /** Applies everything currently in localStorage onto `target`. */
-export function loadPersistedSettings<T>(target: T, entries: readonly PersistedSetting<T>[]): void {
+function loadPersistedSettings<T>(target: T, entries: readonly PersistedSetting<T>[]): void {
 	if (typeof localStorage === 'undefined') return;
 	for (const entry of entries) {
 		entry.load(target, localStorage.getItem(entry.key));
@@ -326,7 +326,7 @@ export function loadPersistedSettings<T>(target: T, entries: readonly PersistedS
  * *other* same-origin document, so each window folds its siblings' changes into
  * its own state instead of drifting until the next restart.
  */
-export function installPersistedSettings<T>(target: T, entries: readonly PersistedSetting<T>[]): void {
+function installPersistedSettings<T>(target: T, entries: readonly PersistedSetting<T>[]): void {
 	for (const entry of entries) {
 		$effect(() => {
 			writeStoredSetting(entry.key, entry.read(target));
diff --git a/src/lib/stores/update.svelte.ts b/src/lib/stores/update.svelte.ts
index d281ce1..d211939 100644
--- a/src/lib/stores/update.svelte.ts
+++ b/src/lib/stores/update.svelte.ts
@@ -2,7 +2,7 @@ import { check, type Update } from '@tauri-apps/plugin-updater';
 import { relaunch } from '@tauri-apps/plugin-process';
 import { getVersion } from '@tauri-apps/api/app';
 
-export type UpdatePhase =
+type UpdatePhase =
 	| 'idle'
 	| 'checking'
 	| 'up-to-date'
@@ -10,7 +10,7 @@ export type UpdatePhase =
 	| 'downloading'
 	| 'error';
 
-export type ErrorSource = 'check' | 'download' | 'install';
+type ErrorSource = 'check' | 'download' | 'install';
 
 // Match only messages that genuinely indicate the updater plugin lacks an
 // endpoint / pubkey configuration. We deliberately do NOT match the bare
diff --git a/src/lib/utils/editorToolbar.ts b/src/lib/utils/editorToolbar.ts
index 2415d0e..69c57ae 100644
--- a/src/lib/utils/editorToolbar.ts
+++ b/src/lib/utils/editorToolbar.ts
@@ -1,4 +1,4 @@
-export type EditorToolbarGroup = 'inline' | 'block' | 'list' | 'insert';
+type EditorToolbarGroup = 'inline' | 'block' | 'list' | 'insert';
 
 export type EditorToolbarTool = {
 	id: string;
@@ -13,7 +13,7 @@ export type EditorToolbarMove = {
 	toIndex: number;
 };
 
-export const EDITOR_TOOLBAR_TOOLS: EditorToolbarTool[] = [
+const EDITOR_TOOLBAR_TOOLS: EditorToolbarTool[] = [
 	{ id: 'fmt-bold', label: 'B', name: 'Bold', shortcut: (modifier) => `${modifier}+B`, group: 'inline' },
 	{ id: 'fmt-italic', label: 'I', name: 'Italic', shortcut: (modifier) => `${modifier}+I`, group: 'inline' },
 	{ id: 'fmt-underline', label: 'U', name: 'Underline', shortcut: (modifier) => `${modifier}+U`, group: 'inline' },
diff --git a/src/lib/utils/exportFonts.ts b/src/lib/utils/exportFonts.ts
index 804fb64..5299bb4 100644
--- a/src/lib/utils/exportFonts.ts
+++ b/src/lib/utils/exportFonts.ts
@@ -53,7 +53,7 @@ function selectorClasses(selector: string): string[] {
 		.filter((name) => name !== 'katex');
 }
 
-export interface KatexFamilyRule {
+interface KatexFamilyRule {
 	/** Class tokens that must all be present for the rule to apply. */
 	classes: string[];
 	families: string[];
@@ -64,7 +64,7 @@ export interface KatexFamilyRule {
  * family, read out of the stylesheet rather than hard-coded, so a KaTeX upgrade
  * that renames a class or adds a family is picked up without edits here.
  */
-export function parseKatexFamilyRules(css: string): KatexFamilyRule[] {
+function parseKatexFamilyRules(css: string): KatexFamilyRule[] {
 	const rules: KatexFamilyRule[] = [];
 	for (const match of css.matchAll(/([^{}]+)\{([^{}]*)\}/g)) {
 		const selector = match[1].trim();
@@ -81,7 +81,7 @@ export function parseKatexFamilyRules(css: string): KatexFamilyRule[] {
 }
 
 /** Every class token used anywhere under `root`, including `root` itself. */
-export function collectClassNames(root: Element): Set<string> {
+function collectClassNames(root: Element): Set<string> {
 	const names = new Set<string>();
 	// Walked rather than selected: `querySelectorAll('*')` is the one call that
 	// would tie this to a full selector engine, and the walk is no slower.
@@ -221,7 +221,7 @@ export function katexFontUrlsToEmbed(css: string, usedFamilies: Set<string>): st
 }
 
 /** `btoa` in chunks: a 30 KB font blows the argument limit of `apply`. */
-export function bytesToBase64(bytes: Uint8Array): string {
+function bytesToBase64(bytes: Uint8Array): string {
 	let binary = '';
 	const chunk = 0x8000;
 	for (let index = 0; index < bytes.length; index += chunk) {
diff --git a/src/lib/utils/frontMatter.ts b/src/lib/utils/frontMatter.ts
index 3f256d0..4eff8b1 100644
--- a/src/lib/utils/frontMatter.ts
+++ b/src/lib/utils/frontMatter.ts
@@ -1,6 +1,6 @@
 import { parseDocument } from 'yaml';
 
-export type FrontMatterValueKind = 'string' | 'number' | 'boolean' | 'list' | 'object' | 'null';
+type FrontMatterValueKind = 'string' | 'number' | 'boolean' | 'list' | 'object' | 'null';
 
 export type FrontMatterField = {
 	key: string;
@@ -198,7 +198,7 @@ export function updateFrontMatterField(content: string, key: string, value: unkn
 	return `---${parsed.lineEnding}${serialized}${parsed.lineEnding}---${parsed.lineEnding}${parsed.lineEnding}${parsed.body}`;
 }
 
-export function parseFrontMatterTagInput(value: string): string[] {
+function parseFrontMatterTagInput(value: string): string[] {
 	return value
 		.split(',')
 		.map((item) => item.trim())
diff --git a/src/lib/utils/markdownLinks.ts b/src/lib/utils/markdownLinks.ts
index 53772a3..11a3129 100644
--- a/src/lib/utils/markdownLinks.ts
+++ b/src/lib/utils/markdownLinks.ts
@@ -15,7 +15,7 @@ export function hasMarkdownLinkExtension(path: string): boolean {
 	return /\.(md|markdown|mdown|mkd|txt)$/i.test(path);
 }
 
-export function isAbsoluteMarkdownPath(path: string): boolean {
+function isAbsoluteMarkdownPath(path: string): boolean {
 	return path.startsWith('/') || path.startsWith('\\') || /^[a-z]:/i.test(path);
 }
 
diff --git a/src/lib/utils/mermaidPrint.ts b/src/lib/utils/mermaidPrint.ts
index 7087948..2f7ca8c 100644
--- a/src/lib/utils/mermaidPrint.ts
+++ b/src/lib/utils/mermaidPrint.ts
@@ -22,7 +22,7 @@ const SOURCE_ATTR = 'data-mermaid-source';
 
 export const MERMAID_PRINT_THEME = 'neutral';
 
-export interface MermaidRenderer {
+interface MermaidRenderer {
 	initialize(config: { startOnLoad: boolean; theme: string }): void;
 	render(id: string, source: string): Promise<{ svg: string }>;
 }
diff --git a/src/lib/utils/openExportedFile.ts b/src/lib/utils/openExportedFile.ts
index 1799ee3..c494bdd 100644
--- a/src/lib/utils/openExportedFile.ts
+++ b/src/lib/utils/openExportedFile.ts
@@ -1,7 +1,7 @@
 export type ExportedFileFormat = 'HTML' | 'PDF';
 export type OpenExportedFileResult = 'opened' | 'declined' | 'failed';
 
-export type OpenExportedFileLabels = {
+type OpenExportedFileLabels = {
 	title?: string;
 	message?: string;
 };
diff --git a/src/lib/utils/pasteContext.ts b/src/lib/utils/pasteContext.ts
index ae491fb..aa67de0 100644
--- a/src/lib/utils/pasteContext.ts
+++ b/src/lib/utils/pasteContext.ts
@@ -26,7 +26,7 @@ export const MARKDOWN_LANGUAGE_ID = 'markdown';
  * A plain letter is used on purpose: it carries no markdown meaning, so it
  * cannot open or close a construct that would change the caret's own token.
  */
-export const PASTE_PROBE_CHARACTER = 'x';
+const PASTE_PROBE_CHARACTER = 'x';
 
 export type PasteContextToken = {
 	readonly offset: number;
@@ -34,7 +34,7 @@ export type PasteContextToken = {
 	readonly language: string;
 };
 
-export type PasteContextTokenizer = (text: string) => readonly (readonly PasteContextToken[])[];
+type PasteContextTokenizer = (text: string) => readonly (readonly PasteContextToken[])[];
 
 /**
  * Token types Monaco's markdown grammar emits for code. The `.md` suffix is
@@ -79,7 +79,7 @@ export function findTokenAtOffset(
 	return found;
 }
 
-export function isCodeAtOffset(tokens: readonly PasteContextToken[], offset: number): boolean {
+function isCodeAtOffset(tokens: readonly PasteContextToken[], offset: number): boolean {
 	const token = findTokenAtOffset(tokens, offset);
 	return token ? isCodeToken(token) : false;
 }
diff --git a/src/lib/utils/tabFileActions.ts b/src/lib/utils/tabFileActions.ts
index d0e070e..b6e7eea 100644
--- a/src/lib/utils/tabFileActions.ts
+++ b/src/lib/utils/tabFileActions.ts
@@ -1,6 +1,6 @@
 import { isHomePath } from './homeTab.js';
 
-export type TabFileActionId = 'copy-path' | 'open-location';
+type TabFileActionId = 'copy-path' | 'open-location';
 
 export type TabFileAction = {
 	id: TabFileActionId;
diff --git a/src/lib/utils/titlebarToolbar.ts b/src/lib/utils/titlebarToolbar.ts
index 3c60d5f..14e7a41 100644
--- a/src/lib/utils/titlebarToolbar.ts
+++ b/src/lib/utils/titlebarToolbar.ts
@@ -20,7 +20,7 @@ export type ConfiguredTitlebarToolbarIds = {
 	menuIds: string[];
 };
 
-export const TITLEBAR_TOOLBAR_ACTIONS: TitlebarToolbarAction[] = [
+const TITLEBAR_TOOLBAR_ACTIONS: TitlebarToolbarAction[] = [
 	{ id: 'back', labelKey: 'menu.back', fallbackName: 'Back', sample: '<', defaultPlacement: 'bar' },
 	{ id: 'forward', labelKey: 'menu.forward', fallbackName: 'Forward', sample: '>', defaultPlacement: 'bar' },
 	{ id: 'reload', labelKey: 'tooltip.reloadFromDisk', fallbackName: 'Reload from Disk', sample: 'R', defaultPlacement: 'bar' },