docs: add comprehensive installation guide for fresh machine setup

Add detailed step-by-step installation guide covering:
- Prerequisites installation (Node.js, Git, Python, code editor)
- Repository cloning from GitHub
- Project setup and dependency installation
- Environment configuration with Gemini API key
- Building for development and production
- Running the application (4 different modes)
- Installation verification steps
- Troubleshooting common issues (8 scenarios)
- Quick reference command cheat sheet

Update existing documentation to reference new guide:
- dev.md: Add prominent note for new developers
- README.md: Add "For Developers" section with guide links
- docs/manual.html: Add styled developer section with links

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: KevenWMarkham

README.md

@@ -38,6 +38,8 @@
 
 ### Installation
 
+#### For End Users
+
 #### Windows
 
 1. Download `Transcript Parser-Setup-1.0.0.exe` from the releases
@@ -49,6 +51,13 @@
 - Download `Transcript Parser-Portable-1.0.0.exe`
 - Run directly without installation (no admin rights required)
 
+#### For Developers
+
+If you want to build the application from source:
+
+1. See [Installation Guide](docs/installation-guide.md) for complete setup instructions
+2. See [dev.md](dev.md) for development workflow and project structure
+
 ### First Launch
 
 1. **Set up API Access**

dev.md

@@ -1,17 +1,23 @@
 # Transcript Parser - Development Setup
 
+> **New to this project?** If you're setting up a fresh machine from scratch, see the comprehensive [Installation Guide](docs/installation-guide.md) for step-by-step instructions on installing all prerequisites (Node.js, Git, Python, etc.) and getting the project running.
+
 ## Prerequisites
 
-- **Node.js** (v18 or higher)
+This guide assumes you already have the following installed:
+
+- **Node.js** (v18 or higher) - [Download](https://nodejs.org/)
 - **npm** (comes with Node.js)
-- **Git** (for version control and Husky git hooks)
+- **Git** (for version control and Husky git hooks) - [Download](https://git-scm.com/)
 - **Google Gemini API Key** (for transcription functionality)
   - Get your API key from [Google AI Studio](https://makersuite.google.com/app/apikey)
   - Create a `.env` file in the project root:
     ```bash
     VITE_GEMINI_API_KEY=your_api_key_here
     ```
 
+If you need help installing these prerequisites, see [docs/installation-guide.md](docs/installation-guide.md).
+
 ## Complete Dependencies List
 
 ### Production Dependencies