fix: use shared app chat context

[centdix]

Summary

Move raw app chat selection onto the shared copilot context pipeline so app mode uses the same selected-context mechanism as flow mode instead of a separate current-file/current-runnable path.

Changes

• route raw app file and runnable selection through ContextManager and keep app available context in sync there
• remove the dedicated app footer chip/exclude logic for the current file or runnable and rely on normal selected context badges instead
• make app prompt construction read active file or runnable context from shared selected context only, and keep inspector/code-selection context separate
• update the app eval runner to pass the shared context list explicitly after removing the fallback path

Test plan

• Run npm run check:fast
• Inspect frontend dev logs after the raw app editor rebuild to confirm the Svelte infinite update loop is gone
• Inspect backend logs to confirm the backend stayed healthy
• Run full npm run check once the existing missing wasm parser packages are available in this environment

Notes

• npm run check still fails on pre-existing missing modules windmill-parser-wasm-r and windmill-parser-wasm-wac from frontend/src/lib/infer.ts
• local frontend/package-lock.json remains dirty but is unrelated and not included in this branch changes

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Generated with Claude Code

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Summary by cubic

Routes app chat selection through the shared ContextManager with an active-selection flag, and separates transient editor state from persisted selection. Unifies context selection, badges, and prompt building, and fixes the raw app editor update loop.

• Refactors

  • Introduce AppSelection (persisted in ContextManager via activeSelection) and AppTransientContext (inspector/code selection only).
  • Add aiChatManager.syncAppSelection(...), updateAvailableContextForApp(...), and setSelectedAppContext(...) to keep app available/selected context in sync.
  • Always read availableContext from ContextManager; show selected file/runnable via standard badges (removed app-specific chips and exclusion toggle).
  • Build app prompts from shared selected context plus transient inspector/code selection; add format/truncation helpers; update tools to read selection from ContextManager.
  • Raw app editor now exposes getTransientContext() and pushes selection via syncAppSelection; removed exclusion and runnable-clear path.
  • Include app context in persisted message contextElements for APP mode as well.

• Bug Fixes

  • Eliminates the Svelte infinite update loop in the raw app editor by removing app-specific context paths.

^{Written for commit f31c68e. Summary will update on new commits.}

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