CLI: Add compact report format for social media sharing

[sanggggg]

Motivation

Users want to share their session insights on social media (Twitter/X, etc.) but current report outputs are too verbose. We need a compact, punchy format optimized for character-limited platforms with visual appeal.

User Story

As a retrochat user, I want to generate a compact report summary so that I can easily share my coding session insights on Twitter/X or other social platforms.

Requirements

Output Format

• Character limit: ~280 characters (Twitter/X compatible)
• Content: Top 3 scores, 1-2 key metrics, 1 standout insight
• Visual: Emoji support for visual appeal and engagement
• Copy-friendly: Easy to copy-paste for immediate sharing

CLI Interface

cargo run -- analyze insights --compact
cargo run -- analyze insights --format compact

Example Output

🚀 Today's Session: 85% productivity • 12 files changed • 3.2k tokens
📊 Scores: Code Quality 92 | Efficiency 81 | Learning 88
💡 Key insight: Strong refactoring with comprehensive testing
#coding #productivity

Technical Implementation

Files to Modify

• src/cli/analytics.rs - Add compact formatting function
• src/cli/mod.rs - Add --compact flag or --format compact option
• src/services/analytics/models.rs - May need summary extraction helpers

Approach

1. Add CLI argument for compact format
2. Create format_compact_report() function
3. Extract top 3 scores (sorted by value)
4. Select 1-2 most impactful quantitative metrics
5. Pick highest-priority qualitative insight
6. Format with emojis and visual hierarchy
7. Ensure output stays within ~280 char limit

Dependencies

• No new dependencies needed (use existing formatting)
• Consider emoji crate or Unicode literals for icons

Acceptance Criteria

• --compact flag added to analyze command
• Output is ≤280 characters
• Includes top 3 scores
• Includes 1-2 key metrics
• Includes 1 standout insight
• Uses emojis for visual appeal
• Easy to copy-paste
• Works with existing analytics pipeline
• Documented in CLI help text

Related Code References

• Current analytics output: src/cli/analytics.rs:48-120
• Report formatting: src/cli/analytics.rs:122-200
• CLI argument parsing: src/cli/mod.rs:30-50

Priority

Medium - Nice to have for user engagement and sharing