Description

The weather panel currently shows a plain text list of 3-day forecasts (Mon 72° / 58°). Replace or supplement this with a visual 7-day forecast bar using Textual's Sparkline widget or Unicode block characters — one column per day showing high/low temp range.

Implementation:

• Use the daily[] array from the weather payload (already fetched, has max, min, date, precipProb)
• Render a mini bar chart: each day as a labeled column with a filled block representing the temp range, colored by high temp (cool→warm gradient)
• Show day abbreviation + high/low below each bar
• Precipitation probability shown as a % label or bar fill change when ≥ 20%
• Textual Sparkline could show just highs; a custom Static Rich table gives more control over high/low ranges

Weather payload already has up to 7 days of daily data.

Acceptance Criteria

• #1 Weather panel shows a visual 7-day forecast
• #2 Each day shows abbreviated name, high, low
• #3 Precipitation probability indicated when >= 20%
• #4 Chart fits within the panel without horizontal scrolling at typical terminal widths
• #5 Falls back gracefully if fewer than 7 days available