feat: bulk add workspaces via multi-select picker

[amanthanvi]

Implements bulk workspace add so projects can be added in one operation.

Behavior

• "Add Workspace(s)…" now supports selecting multiple folders in the directory picker.
• Adds selections sequentially, activates only the first newly-added workspace, and avoids focus bouncing.
• Skips already-added paths and non-directories; continues on per-path failures.
• Shows a single summary dialog only when something is skipped or fails.
• Drag/drop of multiple paths routes through the same bulk-add pipeline.

Code

• src/services/tauri.ts: add pickWorkspacePaths() wrapper for multi-select directory picking (+ tests).
• src/features/workspaces/hooks/useWorkspaces.ts: add addWorkspacesFromPaths() and update addWorkspace() to use multi-select + summary behavior (+ tests).
• src/features/app/hooks/useWorkspaceActions.ts: add bulk drop handler wiring.
• src/App.tsx: drop handler now calls bulk-add once (no per-path activation).
• src-tauri/src/menu.rs, src/features/home/components/Home.tsx, src/features/app/components/SidebarHeader.tsx: update labels to reflect multi-select.

Validation

• npm ci
• npm run lint
• npm run test
• npm run typecheck
• cd src-tauri && cargo test

Closes #383.

[Copilot]

Pull request overview

Adds a bulk “add workspaces” flow so users can select (or drop) multiple folders and have them added sequentially with stable activation and a single summary dialog for skips/failures.

Changes:

• Added a multi-select directory picker wrapper (pickWorkspacePaths) with tests.
• Implemented a centralized bulk-add pipeline in useWorkspaces and updated “Add Workspace…” to use it (with summary dialog + activation of only the first added workspace).
• Routed multi-path drag/drop through the same bulk-add pipeline and updated UI/menu labels to reflect multi-select.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/services/tauri.ts	Adds pickWorkspacePaths() wrapper for multi-select directory picking.
src/services/tauri.test.ts	Adds tests covering cancel/single/multi return shapes for pickWorkspacePaths().
src/features/workspaces/hooks/useWorkspaces.ts	Adds addWorkspacesFromPaths() bulk pipeline and updates addWorkspace() to use multi-select picker.
src/features/workspaces/hooks/useWorkspaces.test.tsx	Adds bulk-add tests (activation + summary dialog behavior).
src/features/app/hooks/useWorkspaceActions.ts	Wires in a bulk handler (handleAddWorkspacesFromPaths) for callers (e.g., drag/drop).
src/features/app/hooks/useWorkspaceActions.test.tsx	Updates hook construction to include the new bulk-add param.
src/App.tsx	Updates drop handling to invoke bulk-add once (avoids per-path activation/focus bouncing).
src/features/home/components/Home.tsx	Updates button label to “Add Workspaces”.
src/features/app/components/SidebarHeader.tsx	Updates aria-label to “Add workspaces”.
src-tauri/src/menu.rs	Updates menu label to “Add Workspaces...”.

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[amanthanvi]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. 👍

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[Dimillian]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. More of your lovely PRs please.

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