Add --as flag for Drive upload type override and fix trashed filtering

[wesnick]

Summary

This PR adds support for the --as flag to drive upload, allowing users to force a target Google Workspace type (doc, sheet, slides, etc.) without requiring --convert. It also fixes a critical issue where trashed items were leaking into drive list and drive search results.

Key Changes

• New --as flag for drive upload: Allows forcing the converted-to type (e.g., --as sheet) to override extension inference. Accepts friendly aliases (doc, sheet, slides, drawing, form) or raw application/vnd.google-apps.* MIME types.

• Source MIME type declaration: Added driveSourceMimeByExt map and driveMediaOption() function to explicitly declare the source content type during upload. This prevents Drive's import converter from content-sniffing files (e.g., .csv as text/plain instead of text/csv), which was causing CSVs to be imported as Docs even when the target was a spreadsheet.

• Trashed items filtering:

  • drive list now automatically adds trashed = false to queries (unless the user explicitly mentions trashed in their custom query)
  • drive search now includes trashed = false in its generated query
  • This prevents trashed items from leaking into folder/search listings

• Helper function resolveDriveTargetMime(): Validates and resolves --as values to native Google-apps MIME types, with proper error handling for invalid inputs.

• Updated function signatures: uploadOneFile(), uploadTree(), and runDriveUpload() now accept a targetMimeOverride parameter to support the --as flag.

• Media upload improvements: Both Files.Create and Files.Update operations now pass explicit media options to declare source content types.

Notable Implementation Details

• The source MIME type is critical for Drive's import converter: it keys off the uploaded media's MIME type, not the target metadata mimeType. Without this, a .csv file would be content-sniffed as text/plain and imported as a Doc even with application/vnd.google-apps.spreadsheet as the target.

• The --as flag implies conversion without requiring --convert, providing a more intuitive UX for users who want to force a specific type.

• Trashed filtering respects user intent: if a custom query explicitly mentions trashed, the automatic filter is skipped, giving users full control when needed.

Tests Added

• TestResolveDriveTargetMime: Validates the --as value resolution logic
• TestRunDriveUpload_ConvertCSVToSheet: Verifies CSV→Sheet conversion with proper source MIME type
• TestRunDriveUpload_AsOverride: Verifies --as forces the target type without --convert
• Updated existing tests to pass the new targetMimeOverride parameter

https://claude.ai/code/session_01K3CYduZ3LYpiYPSuButL56