Gemini Wide Canvas Focus

Gemini Wide Canvas (Focus Mode) is a Chrome extension that reduces distractions on Gemini and expands the usable workspace.

### What It Does

- Toggles Focus Mode on/off when the extension icon is clicked.
- Hides top bar, navigation, and side panels in Focus Mode.
- Expands the main content area to full width.
- Detects the largest visible `iframe` and brings it into a full-viewport focus layout.
- Adds a small close button (`Focus kapat (Esc)`) and supports closing with the `Esc` key.
- Persists state with `chrome.storage.sync` and shows `ON` badge text when enabled.
- Keeps focus behavior stable during Gemini SPA transitions by observing DOM updates.

### How It Works (Technical Flow)

1. User clicks the extension action icon.
2. `background.js` toggles `gemini_focus_enabled` in `storage.sync`.
3. `background.js` sends `GEMINI_FOCUS_SET` to the active tab.
4. `content.js` receives the message and enables/disables Focus Mode.
5. `styles.css` applies layout overrides and iframe focus styling.

### Permissions

- `storage`: stores Focus Mode state.
- `host_permissions`: runs only on `https://gemini.google.com/*`.

### Privacy

- No user data collection.
- No data transmission to external servers.
- Only visual/layout adjustments on Gemini pages.