fix: prevent workspace overwrites.

[knightedcodemonkey]

• refactor: move repository selection to workspaces drawer.
• closes Implement a UX and data-integrity refactor #98
• fixes Workspace-switch overwrites can happen #97

[Copilot]

Pull request overview

This PR moves repository selection to the Workspaces drawer and refactors workspace identity/persistence so that switching repos/workspaces doesn’t overwrite other workspace records (fixing the integrity issues described in #97/#98).

Changes:

• Add a repository selector + repo-scoped filtering to the Workspaces drawer; make the Open PR drawer repository control read-only.
• Refactor workspace identity from deterministic id (repo/head-derived) to a stable random id plus a deterministic workspaceKey for dedupe/lookup.
• Add guards around PR editor sync / context transitions to avoid applying late or cross-repo updates; expand Playwright coverage and shard CI.

Reviewed changes

Copilot reviewed 38 out of 39 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/modules/workspace/workspaces-drawer/drawer.js	Adds repository filter UI/logic and “start new context” option.
src/modules/workspace/workspace-tab-helpers.js	Introduces createWorkspaceRecordId() and toWorkspaceRecordKey(); removes repo/head-derived ids.
src/modules/workspace/workspace-storage.js	Normalizes records to include workspaceKey.
src/modules/github/pr/editor-sync.js	Adds shouldApplySyncResult hook to gate sync application.
src/modules/github/pr/drawer/controller/ui-state.js	Forces PR drawer repository select to always be disabled; adds resetStatus().
src/modules/github/pr/drawer/controller/run-submit.js	Plumbs repositoryFullName through PR opened / commit pushed callbacks.
src/modules/github/pr/drawer/controller/repository-form.js	Makes repository select display-only with a Workspaces-managed placeholder.
src/modules/github/pr/drawer/controller/public-actions.js	Consolidates “clear active context” logic with repo-aware helper.
src/modules/github/pr/drawer/controller/events.js	Removes repository-select change handler (repo no longer selected here).
src/modules/github/pr/drawer/controller/create-controller.js	Adjusts hydration/persisted context logic and exposes resetStatus.
src/modules/github/byot-controls.js	Removes localStorage-backed repo selection; adds “Select repository from Workspaces” placeholder and clearing helper.
src/modules/app-core/workspace-sync-controller.js	Includes workspaceKey in snapshots; stops rekeying identity via repo/head.
src/modules/app-core/workspace-save-controller.js	Adds preserveRecordId controls and dedupes by workspaceKey.
src/modules/app-core/workspace-pr-session-handoff-controller.js	Uses random workspace ids for fresh locals and ensures workspaceKey is written.
src/modules/app-core/workspace-controllers-setup.js	Wires new toWorkspaceRecordKey and metadata persistence options.
src/modules/app-core/workspace-context-controller.js	Updates restore logic to prefer by id or workspaceKey; tweaks drawer refresh behavior.
src/modules/app-core/pr-context-transition.js	New: computes PR context transitions (activate/ignore/mark closed/inactive).
src/modules/app-core/pr-context-state.js	New: PR context predicates (identity, mismatches, closed-status detection).
src/modules/app-core/pr-context-state-change-handler.js	New: centralized PR-context change handler used by workflows.
src/modules/app-core/pr-context-records.js	New: helper to persist “closed” status across matching records.
src/modules/app-core/persisted-active-pr-context.js	Loosens persisted-context validation (no longer requires prTitle).
src/modules/app-core/github-workflows.js	Adds Workspaces repo selector wiring, sync gating, and repo-aware reconciliation.
src/modules/app-core/github-workflows-setup.js	Plumbs new dependencies (syncActiveWorkspaceRepositoryScope, clear repo selection).
src/modules/app-core/app-bindings-startup.js	Metadata persistence now configures head-branch persistence to preserve ids.
src/index.html	Adds repository selector to Workspaces drawer; updates PR drawer status copy.
src/app.js	Adds workspace repo scope state and new PR-context state handling + archiving behavior.
playwright/rendering-modes/workspace-graph.spec.ts	New: moves/expands workspace graph-related tests.
playwright/rendering-modes/core.spec.ts	Removes extracted workspace-graph tests and fixes helper import path.
playwright/rendering-modes/auto-render-scope.spec.ts	New: isolates auto-render scope test.
playwright/helpers/app-test-helpers.ts	Adds ensureWorkspacesDrawerClosed; updates BYOT connect helper for new flow.
playwright/github-pr-drawer/open-pr-confirmation.spec.ts	New: Open PR confirmation coverage.
playwright/github-pr-drawer/github-pr-drawer.helpers.ts	New: shared helpers + IndexedDB utilities for PR/workspace tests.
playwright/github-pr-drawer/active-context-switch.spec.ts	New: extensive integrity regression tests for workspace switching.
playwright/github-byot-ai.spec.ts	Updates repo selection test to use Workspaces drawer flow; asserts repo select disabled.
docs/pr-context-storage-matrix.md	Updates documented workspace-restore selection rules for repo/no-repo scope.
.github/workflows/playwright.yml	Splits Chromium E2E into 2 shards to reduce wall-clock time.

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