fix(webview): invalidate per-view state after reset and import

[easonLiangWorldedtech]

Summary

Invalidate per-view state across all parallel webview instances when a full reset or settings import occurs. This is a sibling follow-up PR that should be reviewed after PR #977 lands.

Blocked until PR #977 (feat/view-local-state-base) lands/rebase.

Changes

• Reset broadcast: broadcastResetToAllInstances now clears both in-memory and durable view state for all parallel instances
• Settings import: Added broadcast hook + try/catch wrapper around reset broadcast after settings import completes, ensuring all parallel tabs receive invalidation signals
• Each instance reloads its merged state from global defaults upon receiving the invalidation

Scope

• broadcastResetToAllInstances: clear local + durable view state on reset
• Settings import: wrap reset broadcast in try/catch, ensure all parallel tabs receive invalidation
• Depends on PR fix(webview): add durable per-view state base #977 (feat/view-local-state-base) for the per-view state foundation

Tests

• Targeted reset/import tests: 81 passed

Related

• Fixes [BUG] Invalidate per-view state after reset and settings import #980 (this issue)
• Depends on PR fix(webview): add durable per-view state base #977 (feat/view-local-state-base) — the per-view state foundation
• Old Issue [BUG] Multi-tab mode/model settings get overwritten by latest task #908 (historical context)
• Old PR fix(webview): isolate parallel provider view state #909 (parent PR that this splits from)

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 8c8727f4-8099-4b4e-acfb-4623ba28d538

📥 Commits

Reviewing files that changed from the base of the PR and between 3024768 and e7512a0.

📒 Files selected for processing (15)

• packages/types/src/__tests__/index.test.ts
• packages/types/src/global-settings.ts
• packages/types/src/vscode-extension-host.ts
• src/core/config/__tests__/importExport.spec.ts
• src/core/config/importExport.ts
• src/core/webview/ClineProvider.ts
• src/core/webview/__tests__/ClineProvider.parallelMode.spec.ts
• src/core/webview/__tests__/ClineProvider.spec.ts
• src/core/webview/__tests__/ClineProvider.sticky-mode.spec.ts
• src/core/webview/__tests__/webviewMessageHandler.spec.ts
• src/core/webview/webviewMessageHandler.ts
• webview-ui/src/App.tsx
• webview-ui/src/__tests__/App.spec.tsx
• webview-ui/src/context/ExtensionStateContext.tsx
• webview-ui/src/utils/vscode.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[codecov]

Codecov Report

❌ Patch coverage is 86.24339% with 26 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/core/webview/ClineProvider.ts	89.44%	10 Missing and 7 partials ⚠️
webview-ui/src/utils/vscode.ts	66.66%	2 Missing and 3 partials ⚠️
src/core/webview/webviewMessageHandler.ts	42.85%	4 Missing ⚠️

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