feat: add blog system with static site generator

- Add blog posts in Markdown (_posts/)
- Build script converts MD to HTML at container build time
- First posts: building with AI lessons, quick start guide
- AGENTS.md documents blog writing style (unixsheikh-inspired)

www/_posts/2026-03-27-quick-start-guide.md

@@ -0,0 +1,59 @@
+---
+title: Quick Start Guide
+date: 2026-03-26
+author: Konrad Lother
+excerpt: How to get started with DearDiary in 5 minutes
+---
+
+# Quick Start Guide
+
+Getting started with DearDiary takes about 5 minutes. Here's how:
+
+## 1. Create an Event
+
+Press **Ctrl+J** anywhere in the app to open the Quick Add widget. Type your event and press Enter.
+
+That's it. It takes 3 seconds.
+
+Try these:
+- "Had coffee with Sarah at the new cafe downtown"
+- "Finished the chapter on machine learning"
+- "Rain started around 3pm, got soaked walking back"
+
+## 2. Add More Events
+
+Throughout your day, capture anything that feels worth remembering:
+- Meetings and conversations
+- Meals and what you ate
+- Exercise and how you felt
+- Thoughts and ideas
+- Photos and voice memos
+
+Don't overthink it. A short note is better than nothing.
+
+## 3. Generate Your Diary
+
+When you're ready, click the **Generate** button on today's page. AI reads all your events and writes a narrative diary entry.
+
+You can:
+- Regenerate with different instructions
+- Add context by including previous days' diaries
+- Edit the generated diary (but the events stay locked)
+
+## 4. Review and Reflect
+
+Read your generated diary. Does it capture the essence of your day? If not, regenerate with instructions like:
+
+> "Focus more on the interesting conversations I had"
+
+or
+
+> "Make it more concise, highlight the key moments"
+
+## Pro Tips
+
+- **Be specific**: "Lunch with Marcus, talked about his new hiking trip to Patagonia" beats "Had lunch"
+- **Capture emotions**: "Felt anxious before the presentation" is more interesting than "Presented to team"
+- **Use voice**: Record voice memos while driving or walking - very efficient
+
+That's it. Happy journaling!