feat: add streamer mode for privacy during streaming

- Add quick toggle button in InputBar for easy access
- Mask API keys in settings when streamer mode active
- Optional path masking to hide usernames in file paths
- Visual LIVE indicator in both InputBar and StatusBar
- Keyboard shortcut Ctrl+Shift+S for quick toggle
- Privacy section in settings for additional options

Closes #35

src/lib/stores/config.ts

@@ -19,6 +19,8 @@ export interface HikariConfig {
   update_checks_enabled: boolean;
   character_panel_width: number | null;
   font_size: number;
+  streamer_mode: boolean;
+  streamer_hide_paths: boolean;
 }
 
 const defaultConfig: HikariConfig = {
@@ -37,6 +39,8 @@ const defaultConfig: HikariConfig = {
   update_checks_enabled: true,
   character_panel_width: null,
   font_size: 14,
+  streamer_mode: false,
+  streamer_hide_paths: false,
 };
 
 function createConfigStore() {
@@ -145,6 +149,12 @@ function createConfigStore() {
       config.subscribe((c) => (currentConfig = c))();
       return currentConfig;
     },
+
+    toggleStreamerMode: async () => {
+      let currentConfig: HikariConfig = defaultConfig;
+      config.subscribe((c) => (currentConfig = c))();
+      await updateConfig({ streamer_mode: !currentConfig.streamer_mode });
+    },
   };
 }
 
@@ -174,3 +184,25 @@ export { MIN_FONT_SIZE, MAX_FONT_SIZE, DEFAULT_FONT_SIZE };
 export const configStore = createConfigStore();
 
 export const isDarkTheme = derived(configStore.config, ($config) => $config.theme === "dark");
+
+export const isStreamerMode = derived(configStore.config, ($config) => $config.streamer_mode);
+export const shouldHidePaths = derived(
+  configStore.config,
+  ($config) => $config.streamer_mode && $config.streamer_hide_paths
+);
+
+/**
+ * Masks file paths in text when streamer mode with hide paths is enabled.
+ * Replaces username portion of paths with asterisks.
+ */
+export function maskPaths(text: string, hidePaths: boolean): string {
+  if (!hidePaths) return text;
+
+  // Match Unix paths like /home/username/... or /Users/username/...
+  // and Windows paths like C:\Users\username\...
+  return text
+    .replace(/\/home\/([^\/\s]+)/g, "/home/****")
+    .replace(/\/Users\/([^\/\s]+)/g, "/Users/****")
+    .replace(/C:\\Users\\([^\\\s]+)/gi, "C:\\Users\\****")
+    .replace(/~\//g, "****/");
+}