fix(web): use theme colors for thread status

[rynfar]

Thread status colors in the sidebar and notification toasts were hardcoded, so they did not follow custom theme palettes. This changes the draft, snoozed, approval, failure, wake, completion, and notification markers to the existing semantic theme tokens.

This is a bounded part of frozen upstream source 315fcca10a in #865. The source's wider appearance-token changes remain pending; this PR does not mark that source fully reconciled. Plan-ready violet and sidebar input indigo remain distinct, as they do in the upstream source.

Validation: 207 focused tests, web typecheck and build, scoped lint and formatting, and independent adversarial review. The reviewer checked token definitions and light/dark fallbacks. Before/after screenshots attached to the PR show synthetic Woke and Snoozed rows responding to a custom semantic palette in the isolated browser.

Implemented by GPT-6 Sol (low) via the Pylon Codex harness; independently reviewed by GPT-6 Sol (low).

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	14.0 KiB	14.0 KiB	+23 B (+0.2%)	15.1 KiB	✅
Codex	Thread snapshot wire	7.3 KiB	7.3 KiB	−3 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.7 KiB	6.8 KiB	+26 B (+0.4%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	58.0 KiB	58.0 KiB	+44 B (+0.1%)	66.4 KiB	✅
Codex	Live turn messages	9	10	+1 (+11.1%)	21	✅
Claude	Total thread wire	14.0 KiB	14.0 KiB	−19 B (−0.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	7.3 KiB	7.3 KiB	−6 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.7 KiB	6.7 KiB	−13 B (−0.2%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.9 KiB	58.9 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	9	9	0 (0.0%)	21	✅

Baseline: 6099223 · PR result: e3565f6 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 115.7 KiB
• Claude decoded thread snapshot: 116.4 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

[rynfar]

Before/after UI evidence from two isolated Pylon worktrees with the same synthetic sidebar fixture. Both use the Grove theme. For this visual check I overrode only --warning-foreground to rose and --info-foreground to mint in the browser; the values are intentionally distinct from the default amber/blue so hardcoded colors are easy to spot. No live thread data was used.

Before (origin/pylon): Woke remains amber and Snoozed remains blue.

After (this PR): Woke follows warning rose and Snoozed follows info mint.

This verifies the visible token wiring for those two statuses; the remaining changed markers have focused tests, static review, and the web build.