feat(web): show per-agent binding and routing on the Dynamic Workflow card

The card showed one shared model label and a flat member list, so a mixed
workflow (resumed children on an older model, forced policies) had no
explanation.

- Header carries the single count and a status pill; the body opens with a
  routing line: MAIN <model · effort> and SUBAGENTS as Inherit, <model> ·
  Override, or Mixed · N models with a breakdown. Policy and feature
  provenance render on separate lines; a forced policy offers a chip that
  opens Settings → Agent.
- Rows are grouped by phase with severity-aware order (Failed first only
  when a failure exists; Completed collapsed while running) and show
  Profile · Model · Effort, elapsed time, and a provenance word; a row
  created under an earlier routing environment revision says so and the
  card shows how many running subagents keep their model.
- Segmented progress renders one cell per task up to 12 rows, a grouped
  bar beyond; only the active row dot pulses.
- Pure helpers (groupDynamicWorkflowRows, elapsed, formatElapsed) live in
  dynamicWorkflowCardRows.ts with unit tests; the component has its own
  test file. dist-web rebuilt.

Author: elkaix

.changeset/dynamic-workflow-card-routing.md

@@ -0,0 +1,5 @@
+---
+"@pymodel/pythinker-code": minor
+---
+
+The Dynamic Workflow card shows each subagent's profile, model, thinking effort, elapsed time, and routing source, groups rows by phase with failures first, and notes when running subagents were created under an earlier routing.

apps/pythinker-code/dist-web/.web-bundle-manifest.json

@@ -1,4 +1,4 @@
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+  "sourceHash": "d203fd782dff86ee46140064fb3c4c0d6dc3fcb599bfcd4ec9b3f7ec8eb34700",
   "sourceFileCount": 405
 }