fix: keep ctx.ui originals across jiti reloads

[joeshull]

Summary

• Store the pristine ctx.ui originals WeakMap on process (__pi_dashboard_pristine_ui__), same survival trick as BRIDGE_KEY.
• Jiti module-cache invalidation no longer recaptures PromptBus wrappers as natives, which made ask self-cancel in ~30ms after fix: stop ctx.ui re-patch nesting on session_start #116 and can RangeError the TUI adapter (PromptBus TUI originals recaptured as wrappers after jiti reload → infinite onRequest cycle #136).
• Regression: vi.resetModules() + recapture must still call the native select.

Closes #141
Related: #136

Test plan

• vitest run packages/extension/src/__tests__/ctx-ui-session-start-repatch-regression.test.ts
• Reload ~/.omp-dashboard from this branch and confirm ask stays open until answered
• After reload, interactive select/input/batch must not RangeError

[joeshull]

Call

#141 and #136 are the same recapture hole. This PR is the keeper.

Does not fold into in-flight P0–P2 PRs (#137/#138/#139/#140/#143/#121). Those do not touch ctx-ui-originals.ts.

After merge, leftover on #136:

• still caches a __isPromptBusWrapper after the warn
• selectWrapper maps adapter error / missing answer → undefined → ask-tool user-cancel

[joeshull]

Review

Strengths

• Process-scoped WeakMap matches BRIDGE_KEY survival. The actual jiti hole.
• vi.resetModules() + recapture test is real: native still called, wrapper not.
• Required CI green (zge-gates, zge-typecheck, zge-upstream-sync).

Issues

Important (do not block #141)

1. Still caches a wrapper after the warn — ctx-ui-originals.ts:36-52
   Detects __isPromptBusWrapper, logs, then bind+map.set anyway. bind() also drops the tag. First capture after a cold process (no prior native in the process map) still stores the cycle. PromptBus TUI originals recaptured as wrappers after jiti reload → infinite onRequest cycle #136 residual.
   Fix: refuse to store; return {} or walk off the wrapper. Never cache a tagged method.

2. selectWrapper error → user cancel — bridge.ts r.cancelled ? undefined : r.answer + ask-tool.ts selectedFromAnswer(undefined)
   Adapter {cancelled:false, error} still becomes User cancelled ask. Leave on PromptBus TUI originals recaptured as wrappers after jiti reload → infinite onRequest cycle #136.

Minor

• Extra blank line in the new test (ctx-ui-session-start-repatch-regression.test.ts:73-75).

Assessment

Ready to merge for #141. Process map + reload test close the reported 30ms self-cancel after a prior good capture in the same process.

Do not close #136 until (1) is fixed.