fix(vscode): stabilize session status dock

[marius-kilocode]

The chat composer currently changes its vertical geometry at turn boundaries. The working indicator lives inside the scrollable transcript and collapses when work finishes, while the session actions appear separately above the composer. Those two independently changing regions leave a small height difference, so the conversation text moves when the UI swaps between working and idle states. On narrow sidebars, a fixed-height attempt also clipped the wrapped actions row.

This adds one session dock between the transcript and composer. The working indicator and session actions share the same layout cell, with the inactive state hidden but still participating in layout. The dock therefore sizes itself to the taller state at the current width, including wrapped action rows, and the transcript viewport does not move when the state changes. The working indicator is a compact centered cluster with a reserved timer width, so the spinner and elapsed time remain visually connected on both the VS Code sidebar and wide Agent Manager surfaces.

The change includes unit and browser geometry coverage for idle, working, narrow wrapped, wide centered, and timer-width states.

Agent Manager

Before, the working indicator stretched across the composer and separated the spinner from the elapsed time:

After, the indicator is a compact centered cluster aligned with the session actions:

VS Code Sidebar

Before, the narrow sidebar showed the old working row and action layout:

After, the working state stays centered and the wrapped idle actions remain inside the dock without clipping:

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (10 files)

• packages/kilo-vscode/tests/unit/agent-manager-diff-state.test.ts
• packages/kilo-vscode/tests/unit/prompt-send-contract.test.ts
• packages/kilo-vscode/tests/unit/session-queue.test.ts
• packages/kilo-vscode/webview-ui/agent-manager/DiffPanel.tsx
• packages/kilo-vscode/webview-ui/diff-viewer/FullScreenDiffView.tsx
• packages/kilo-vscode/webview-ui/diff-viewer/diff-open-policy.ts
• packages/kilo-vscode/webview-ui/src/components/chat/ChatView.tsx
• packages/kilo-vscode/webview-ui/src/components/chat/SessionDock.tsx
• packages/kilo-vscode/webview-ui/src/context/session.tsx
• packages/kilo-vscode/webview-ui/src/styles/chat-layout.css

Previous Review Summary (commit 0f49ed4)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit 0f49ed4)

Status: 5 Issues Found | Recommendation: Address before merge

Overview

Severity	Count
CRITICAL	0
WARNING	5
SUGGESTION	0

Issue Details (click to expand)

WARNING

File	Line	Issue
packages/kilo-vscode/webview-ui/src/components/chat/ChatView.tsx	378	Readonly chats lose the working indicator
packages/kilo-vscode/webview-ui/src/components/chat/SessionDock.tsx	34	Blocked/empty docks still reserve a blank row
packages/kilo-vscode/webview-ui/src/context/session.tsx	2916	Queued follow-ups hide live tool status
packages/kilo-vscode/webview-ui/agent-manager/DiffPanel.tsx	141	New live review files stay collapsed after first accordion change
packages/kilo-vscode/webview-ui/diff-viewer/FullScreenDiffView.tsx	143	Same live-open freeze in fullscreen review

Files Reviewed (19 files)

• .changeset/steady-session-dock.md - 0 issues
• packages/kilo-vscode/tests/session-dock-stability.spec.ts - 0 issues
• packages/kilo-vscode/tests/unit/prompt-send-contract.test.ts - 0 issues
• packages/kilo-vscode/tests/unit/session-dock.test.ts - 0 issues
• packages/kilo-vscode/tests/unit/session-queue.test.ts - 0 issues
• packages/kilo-vscode/tests/visual-regression.spec.ts - 0 issues
• packages/kilo-ui/src/components/diff.tsx - 0 issues
• packages/kilo-vscode/webview-ui/agent-manager/DiffPanel.tsx - 1 issue
• packages/kilo-vscode/webview-ui/diff-viewer/FullScreenDiffView.tsx - 1 issue
• packages/kilo-vscode/webview-ui/src/components/chat/ChatView.tsx - 1 issue
• packages/kilo-vscode/webview-ui/src/components/chat/MessageList.tsx - 0 issues
• packages/kilo-vscode/webview-ui/src/components/chat/SessionDock.tsx - 1 issue
• packages/kilo-vscode/webview-ui/src/components/shared/WorkingIndicator.tsx - 0 issues
• packages/kilo-vscode/webview-ui/src/components/shared/working-indicator-utils.ts - 0 issues
• packages/kilo-vscode/webview-ui/src/context/session-queue.ts - 0 issues
• packages/kilo-vscode/webview-ui/src/context/session.tsx - 1 issue
• packages/kilo-vscode/webview-ui/src/stories/chat.stories.tsx - 0 issues
• packages/kilo-vscode/webview-ui/src/styles/chat-layout.css - 0 issues
• packages/kilo-vscode/webview-ui/src/styles/session-actions.css - 0 issues

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_{Reviewed by grok-4.6 · Input: 137K · Output: 39.8K · Cached: 600.8K}

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