Add Quick Actions feature (Quick Chat + Bash tabs)

[mcintyre94]

Summary

• Replaces the experimental SideChat with a polished Quick Actions sheet, accessible from the Chat toolbar and Sprite context/swipe actions
• Two tabs: Quick Chat (Claude via claude -p, streaming NDJSON) and Bash (streaming command execution via streamService)
• Bash output can be inserted into the chat input as a fenced code block
• Fixes stream cancellation bug caused by QuickActionsViewModel being recreated on parent re-renders — now stored in @State and presented via .sheet(item:)

Test plan

• Open a Sprite, tap the bolt toolbar button in Chat — Quick Actions sheet opens on Quick Chat tab
• Ask a question in Quick Chat — response streams in correctly, user question shown above
• Switch to Bash tab, run a command — output streams in with > command prompt shown
• Tap "Insert into chat" in Bash — inserts formatted fenced code block, dismisses sheet
• Long-press Sprite in dashboard or swipe — "Quick Actions" context menu entry opens sheet
• Open sheet, start a Quick Chat stream, tap Done — stream cancels cleanly
• Verify stream does not cancel mid-response when sprite status polling fires

🤖 Generated with Claude Code

[claude]

test

[claude]

Missing unit tests

File: Wisp/ViewModels/SideChatViewModel.swift (line 1)

SideChatViewModel is a new view model with non-trivial logic — including send() guard conditions (empty/whitespace trimming, streaming guard), the handle(_:) event dispatch (text accumulation, error detection), and cancel() state management — but no unit tests were added.

Per CLAUDE.md: "Add new unit tests when adding or modifying logic (models, parsers, utilities, view models)"

Please add a WispTests/SideChatViewModelTests.swift covering at least the send() guard conditions, cancel() behaviour, and handle(_:) event processing.

[claude]

Missing private(set) on view-read-only properties

File: Wisp/ViewModels/SideChatViewModel.swift (lines 14–16)

response, isStreaming, and error are only ever read by SideChatView — never set directly from the view. They should be private(set).

Per CLAUDE.md: "Use private(set) for properties that views only need to read, not set directly."

This is the same convention applied to ChatViewModel.sessionId in this very PR.

    private(set) var response = ""
    private(set) var isStreaming = false
    private(set) var error: String?

[claude]

isRunningOnMac should be a shared helper

File: Wisp/Views/SpriteDetail/Chat/SideChatView.swift (lines 89–95)

This is a local copy of the same isRunningOnMac implementation that already exists in ChatInputBar. Per CLAUDE.md: "A safe isRunningOnMac helper should return true in either case by combining the compile-time and runtime checks." — implying a shared utility, not per-view re-implementation.

Please extract this to a shared location (e.g. Wisp/Utilities/PlatformHelpers.swift or an extension) so both ChatInputBar and SideChatView use the same definition.