Show active sub-solver trees in Pipeline Stages and use skip icon

[seveibar]

Motivation

• Surface the currently active nested activeSubSolver chain for each pipeline stage so the table shows the live sub-solver tree inline.
• Replace the play-shaped action glyph which was visually similar to the expand control with a clearer "skip" icon to avoid confusion.

Description

• Added getActiveSubSolverTree helper that recursively builds an indented tree of active sub-solvers and exposed it for testing.
• Added a SolverTree renderer and integrated it into PipelineStagesTable so each stage displays its active sub-solver chain and per-node status badges.
• Replaced the old play SVG with a new SkipIcon component and adjusted layout classes (padding/alignment/shrink behavior) so controls and the tree render cleanly.
• Added unit tests tests/PipelineStagesTable.test.ts covering nested and empty active-sub-solver chains.

Testing

• Ran bun test tests/PipelineStagesTable.test.ts (2 tests passed).
• Ran bun test tests/BasePipelineSolver.test.ts (9 tests passed).
• Ran typecheck with bunx tsc --noEmit (succeeded).
• Ran formatting with bun run format (applied formatting).

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Codex Task

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Project	Deployment	Actions	Updated (UTC)
solver-utils	Ready	Preview, Comment	Mar 23, 2026 8:29pm