feat: add standalone data migrator and workspace resources panel

[GCWing]

Summary

Ship Data Migrator as a separately versioned offline utility with editable source/destination locations, durable resumable tasks, its own localized UI and theme assets, and independent packaging/signing. Desktop startup, settings, development, and release packaging no longer launch or bundle migration.

Add a persistent workspace resources panel that combines files and terminals while keeping the active conversation or editor open. Terminal ownership follows its creation workspace; opening a saved configuration does not execute it, and closing a regular terminal view detaches without stopping the process.

Type and Areas

Feature, refactor, UI, documentation, and CI. Affects Data Migrator, shared Rust configuration/storage owners, Desktop, Web UI, product definitions, and release workflows.

Motivation / Impact

• Users can migrate local legacy data independently of the main application's installation and startup, and resume saved tasks without handoff expiry.
• Workspace file navigation, directory reveal, saved terminal configurations, and explicit terminal start/stop actions share one navigation surface.
• Extract persisted configuration into config-contracts, reusable storage formats into narrowly selected services-core features, and offline converters into legacy-migration-adapters. Core preserves compatibility exports and runtime ownership; the migrator does not depend on Core or Product Assembly. Existing workspace dependency versions are reused.

Verification

Passed on Windows:

• pnpm run check:web — type-check, appearance, typography, theme color, and visual governance contracts.
• pnpm run check:core-boundaries and pnpm run check:core-boundaries:test.
• pnpm run check:github-config, pnpm run check:repo-hygiene, and pnpm run i18n:audit.
• pnpm run data-migrator:theme:check.
• node --test --test-concurrency=1 scripts/data-migrator-tauri-build.test.mjs scripts/desktop-tauri-build.test.mjs scripts/product-customization/resolver.test.mjs scripts/product-customization/projections.test.mjs — 32 tests passed.
• node --check on scripts/dev.cjs, scripts/data-migrator-release.mjs, and the migrator's ui/app.js, ui/theme.js, and ui/transport.js.
• git diff origin/main...HEAD --check and node scripts/check-git-object-sizes.mjs --base origin/main --head HEAD.
• Focused Web UI tests — 12 files, 82 tests passed:

Exact frontend test command

pnpm --dir src/web-ui exec vitest run --maxWorkers=50% src/tools/terminal/services/terminalWorkspaceScope.test.ts src/tools/terminal/services/manualTerminalProfileService.test.ts src/tools/file-system/utils/fileTreeReveal.test.ts src/app/scenes/workspace-resources/workspaceResources.test.ts src/app/scenes/workspace-resources/terminalViewLifecycle.test.tsx src/app/scenes/file-viewer/FileViewerNav.presentation.test.ts src/app/scenes/settings/settingsRegistry.test.ts src/app/services/sessionSceneLifecycle.test.ts src/flow_chat/services/sessionActivation.test.ts src/flow_chat/services/storeSync.test.ts src/app/stores/sceneStore.test.ts src/infrastructure/i18n/core/I18nService.test.ts

Additional focused checks passed on Windows:

• pnpm run lint:web (no errors), followed by ESLint on the changed runtime files.
• pnpm --dir src/web-ui exec vitest run --maxWorkers=4 src/infrastructure/design-system/IconUsageIntegration.test.tsx src/app/scenes/browser/BrowserAddressField.presentation.test.ts src/infrastructure/config/components/ModelServiceCollapse.presentation.test.ts src/tools/editor/services/ModelIndentation.test.ts src/app/scenes/workspace-resources/workspaceResources.test.ts src/app/scenes/workspace-resources/terminalViewLifecycle.test.tsx src/tools/terminal/services/terminalWorkspaceScope.test.ts — 37 tests passed.
• cargo test --locked -p openbitfun-data-migrator -p openbitfun-legacy-migration-adapters -p openbitfun-legacy-migration --lib — 60 tests passed.
• cargo test --locked -p openbitfun-legacy-migration --test migration_engine_contracts — 9 tests passed.
• cargo test --locked -p terminal-core --lib workspace_origin_contract_tests — 2 tests passed.
• cargo test --locked -p openbitfun-config-contracts --lib — 71 tests passed.
• cargo test --locked -p openbitfun-core --no-default-features --features remote-workspace --lib service::workspace::manager::tests — 2 tests passed. The narrower workspace-runtime test selection could not compile because its filesystem test helpers require the remote workspace module.

The full local Web UI run exposed shared-icon regressions, two CRLF-sensitive source tests, and a cold Monaco setup timeout. The affected cases pass after using catalog icons, normalizing test input line endings, and granting only real Monaco initialization a 60-second timeout (measured at about 20 seconds on Windows). Per-test assertion timeouts are unchanged. The full PR CI workflow and Repository Object Sizes check passed on commit 7f805aefed99be41a245f338efd87fe01c83d445. All 14 checks passed, including the full frontend suite, Linux/macOS/Windows Rust and CLI checks, and Linux x64/ARM64 packaging and installer validation.

Reviewer Notes

• Preserves legacy migration plans/reports, original configuration import paths, and optional initialCwd response enrichment for older hosts. Keeps the latest macOS process-inventory fix and Windows hidden-child-process behavior.
• Local automated checks ran on Windows; GitHub CI also passed the applicable Linux, macOS, and Windows jobs. SSH/peer workspace isolation and old terminal payloads have contract coverage; live remote workspace, Remote Control, Peer Device Mode, and Detached Dispatch were not exercised. Data Migrator runs only on the data-owning local computer.
• Native visual verification, browser automation, E2E, cross-platform packaging, and broad Rust builds were not run locally. These checks do not establish rendered visual fidelity.
• AI-assisted. Testing level: focused local automated checks and the full PR CI workflow passed.

Checklist

• Change scope and verification limitations are recorded.
• No secrets, transient prompts, or local build artifacts are included.
• User-facing strings, documentation, and locales are updated.