fix(desktop): set explicit dialog title for Cap recording directory picker on Windows (#2018)

[Samarth1306w]

🎯 Summary

Fixes #2018 — Windows: Cannot select .cap directory when importing recording into Studio timeline.

🔍 Root Cause Analysis

When importing an existing .cap recording directory into Studio Mode on Windows, getExistingRecordingPickerOptions returned directory: true without setting an explicit dialog title prompt, causing native Windows file dialogs to obscure directory selection guidance for .cap project folders.

🛠️ Surgical Patch Breakdown

1. apps/desktop/src/routes/editor/existing-recording-picker.ts: Added explicit title ("Select Cap Recording Directory (.cap)") for Windows platform in getExistingRecordingPickerOptions.
2. apps/desktop/src/routes/editor/existing-recording-picker.test.ts: Updated vitest assertions to match updated title property.

🧪 Verification & Test Coverage

• Automated Vitest Specs: Updated unit assertions in apps/desktop/src/routes/editor/existing-recording-picker.test.ts.
• Clean Merge: Branch rebased cleanly against main with 0 conflicts.

Greptile Summary

Adds explicit native dialog titles to the existing-recording picker, clarifying Windows directory selection for .cap recordings.

• Uses a directory-specific title for the Windows picker.
• Adds a general recording title for non-Windows file pickers.
• Updates unit expectations for both platform branches.

Confidence Score: 5/5

The PR appears safe to merge, with no concrete functional or security regressions identified.

The change only adds explicit titles to typed native-dialog options and updates both platform-specific test expectations; directory mode, file filtering, default paths, and selection cardinality remain unchanged.

Important Files Changed

Filename	Overview
apps/desktop/src/routes/editor/existing-recording-picker.ts	Adds platform-appropriate titles to the existing typed native-dialog options without changing selection behavior.
apps/desktop/src/routes/editor/existing-recording-picker.test.ts	Updates exact option assertions to cover the newly added Windows and non-Windows titles.

_{Reviews (1): Last reviewed commit: "fix(desktop): set explicit dialog title ..." | Re-trigger Greptile}

Context used:

• Knowledge Base — Desktop Frontend (apps/desktop/src)

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