fix(app): require query functions for sync queries

[Hona]

Summary

• require SDK-backed query functions for shared app sync query keys instead of mounting skipToken observers
• use explicit query-key helpers for MCP/session loading checks that only need cache keys
• keep bootstrap store updates outside cached query functions so cache hits still update app state

Testing

• bun --conditions=browser -e "<paused providers query repro>"
• bun typecheck from packages/app
• pre-push bun turbo typecheck

[Copilot]

Pull request overview

This PR updates the app’s global-sync query helpers so sync-related queries always have real query functions, while lightweight loading checks use explicit query-key helpers instead of skipToken observers. It mainly touches bootstrap/query wiring in the app’s shared sync layer and the UI components that consume those query keys.

Changes:

• Reworked global-sync query helpers to require SDK clients and added explicit key helpers for session/MCP/LSP cache lookups.
• Moved some bootstrap-side store updates to .then(...) handlers so cached query results can still hydrate app state.
• Updated UI consumers (sidebar-workspace, MCP dialogs/status, prompt input) to use the new query/key helpers.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/app/src/pages/layout/sidebar-workspace.tsx	Replaces session loading observer usage with useIsFetching + session query-key helper.
packages/app/src/context/global-sync/bootstrap.ts	Refactors bootstrap query helpers to require SDK-backed query functions and moves some state hydration out of query fns.
packages/app/src/context/global-sync.tsx	Adds explicit query-key helpers and updates global sync bootstrap/session loading logic to use them.
packages/app/src/components/status-popover-body.tsx	Switches MCP refetching to use the explicit MCP query-key helper.
packages/app/src/components/prompt-input.tsx	Passes explicit SDK clients into provider/agent queries.
packages/app/src/components/dialog-select-mcp.tsx	Switches MCP refetching to use the explicit MCP query-key helper.

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