Add hover tooltips to tags column showing tag descriptions

[Copilot]

The tags column displays abbreviated indicators ("C" for Cheating, "S" for Sniping) that require users to remember their meanings. This adds hover tooltips that explain each tag and its severity level.

Changes

Data Model

• Added optional hover: str | None = None field to CellValue dataclass
• Updated CellValue.monochrome() to accept hover parameter

Tag Rendering

• Modified render_tags() to generate descriptive hover text:

  # Single tag
  hover="C: Cheating (high)"
  
  # Multiple tags
  hover="C: Cheating (high)\nS: Sniping (medium)"

UI Implementation

• Created Tooltip class for tkinter tooltip display (light yellow background, 20px cursor offset)
• Added tooltip lifecycle management in MainContent:
  • Dictionary tracking active tooltips per widget
  • Automatic creation/destruction on cell updates
  • Cleanup on row removal

Example

When hovering over a cell showing "C S":

┌─────────────────┐
│ C: Cheating     │
│    (high)       │
│ S: Sniping      │
│    (medium)     │
└─────────────────┘

Cells with no tags or pending status show no tooltip.

Original prompt

Add a hover effect to the tags column that shows detailed information about the tags when you hover over a single cell in a row. Add it as an optional field on the cellvalue hover: str | None = None

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