fix(agent-manager): restore multi-project progress indicators

[marius-kilocode]

Multi-project Agent Manager currently routes progress state through the active project and omits busy rendering for expanded project bodies. Local and worktree indicators can therefore remain idle while the corresponding session is working, and multi-version setup progress can be cleared in the wrong project.

This scopes busy and session activity to each project, restores local and worktree indicators in the multi-project sidebar, and carries project ownership through multi-version progress and initial-message events. The result keeps parallel project activity visible without allowing colliding local or worktree IDs to overwrite one another.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

lgtm

Files Reviewed (13 files)

• .changeset/fix-multi-project-progress.md
• packages/kilo-vscode/src/agent-manager/provider-multi-version.ts
• packages/kilo-vscode/src/agent-manager/types.ts
• packages/kilo-vscode/tests/unit/agent-manager-initial-message.test.ts
• packages/kilo-vscode/tests/unit/agent-project-progress.test.ts
• packages/kilo-vscode/tests/unit/project-store.test.ts
• packages/kilo-vscode/webview-ui/agent-manager/AgentManagerApp.tsx
• packages/kilo-vscode/webview-ui/agent-manager/ProjectList.tsx
• packages/kilo-vscode/webview-ui/agent-manager/ProjectSidebarBody.tsx
• packages/kilo-vscode/webview-ui/agent-manager/initial-message.ts
• packages/kilo-vscode/webview-ui/agent-manager/project/progress.ts
• packages/kilo-vscode/webview-ui/src/types/messages/extension-messages.ts
• packages/kilo-vscode/webview-ui/src/types/messages/webview-messages.ts

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_{Reviewed by kimi-k3 · Input: 232.4K · Output: 31.4K · Cached: 4.3M}

_{Review guidance: REVIEW.md from base branch main}