Initial commit: Outlook Web Inbox Count extension v1.4

Chrome/Firefox extension that displays the total inbox item count next
to the Inbox label in Outlook Web. Includes build+publish automation
via the Chrome Web Store API (see PUBLISHING.md).

CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+This is a browser extension (v1.1) that enhances Outlook Web by displaying the total number of items next to the Inbox label. The extension uses a content script to monitor DOM changes and extract inbox count information from the page title.
+
+### Version History
+- **v1.1**: Fixed browser hanging issues with throttling, improved MutationObserver, enhanced DOM selectors, reduced polling frequency
+- **v1.0**: Initial release
+
+## Architecture
+
+- **manifest.json**: Chrome extension manifest (v3) defining permissions, content scripts, and metadata
+- **content.js**: Main content script that runs on Outlook Web pages, implementing:
+  - DOM element detection for inbox labels
+  - Item count extraction from page titles using regex
+  - Dynamic count display with styling
+  - MutationObserver for real-time DOM change monitoring
+  - Periodic refresh mechanism (every 5 seconds after initial 10-second startup)
+
+## Development Workflow
+
+### Testing the Extension
+1. Load as unpacked extension in Chrome/Edge developer mode
+2. Navigate to https://outlook.office.com or https://outlook.office365.com
+3. Check browser console for debug logs starting with "Outlook Inbox Count Extension"
+
+### Packaging
+The .zip file contains the packaged extension ready for distribution.
+
+## Key Implementation Details
+
+- **Performance optimizations (v1.1)**: Throttling mechanism prevents excessive function calls, selective MutationObserver reduces CPU usage
+- **Enhanced DOM detection**: Multiple fallback selectors and regex patterns for different Outlook Web versions
+- **CSS selectors**: Primary `div[title^="Inbox -"][data-folder-name="inbox"]` with fallbacks for `button` elements and various title formats
+- **Count extraction**: Multiple regex patterns including `/Inbox - (\d+) items/`, `/Inbox \((\d+)\)/`, `/(\d+) items/`
+- **Duplicate prevention**: Uses `.added-count` class marking to avoid multiple count displays
+- **Dynamic content handling**: Optimized interval polling (10s) and intelligent mutation observation
+- **Graceful fallback**: Displays "(-)" when count unavailable