Feature: Inline Metrics with Sparkline

[yimsk]

Inline Metrics with Sparkline 📊

Display real-time metrics as sparklines directly in resource lists.

Concept

┌ EC2 Instances ─────────────────────────────────────────────┐
│ Name          State    CPU(15m)     Type       Region     │
│ web-prod-1    running  ▂▃▅▇▅▃▂ 45%  t3.medium  us-east-1  │
│ web-prod-2    running  ▁▁▂▁▁▁▁  8%  t3.medium  us-east-1  │
│ batch-worker  running  ▇▇▇▇▇▇▇ 95%  c5.xlarge  us-east-1  │
│ db-replica    running  ·······  -   t3.small   us-east-1  │
└────────────────────────────────────────────────────────────┘
[M] Toggle metrics | Loading metrics... (3/4)

Target Resources

Resource	Metrics
EC2	CPUUtilization
RDS	CPUUtilization, FreeableMemory
Lambda	Invocations, Errors
ECS Service	CPUUtilization, MemoryUtilization
ELB	RequestCount

Implementation

1. MetricFetcher: CloudWatch GetMetricData batch API
2. Sparkline Renderer: Unicode blocks ▁▂▃▄▅▆▇█
3. Async Loading: Show list first, fill metrics progressively
4. Toggle: M key to enable/disable (default OFF to save API calls)

Technical Notes

• Use GetMetricData for batch efficiency
• 15-minute window, 1-minute resolution (15 data points)
• Cache metrics for short period to avoid repeated calls