feat(polls): export polls as images or spreadsheets

[miaulalala]

☑️ Resolves

• Fix Add option to download poll results as image (png or svg) and raw (xlsx, ods) #13435

AI (if applicable)

• The content of this PR was partly or fully generated using AI

🖌️ UI Checklist

🖼️ Screenshots / Screencasts

🚧 Tasks

• Fix image bg when switching themes

🏁 Checklist

• 🌏 Tested with different browsers / clients:
  • Chromium (Chrome / Edge / Opera / Brave)
  • Firefox
  • Safari
  • Talk Desktop
  • Integrations with Files sidebar and other apps
  • Not risky to browser differences / client
• 🖌️ Design was reviewed, approved or inspired by the design team
• ⛑️ Tests are included or not possible
• 📗 User documentation in https://github.com/nextcloud/documentation/tree/master/user_manual/talk has been updated or is not required

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🛠️ API Checklist

🚧 Tasks

• ...

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not possible
• 📘 API documentation in docs/ has been updated or is not required
• 🔖 Capability is added or not needed

[nimishavijay]

Looks good! Since there are already 4 filetypes here I think we could move this into a submenu, and have only "Download" as a main menu option. That gives us space to add more things to this menu in the future and support more filetypes in the future too.
@miaulalala agreed with your comments about text and icons :) we could do

Image (.img)
Image (.png)
Spreadsheet (.xlsx)
Spreadsheet (.ods)

For image: image
For spreadsheet: table

[nickvergessen]

Since there are already 4 filetypes here

We are going to remove the images and then I would deduplicate the spreadsheets to only ods?

[nimishavijay]

I would if possible also add csv, it is common enough filetype for polls, but not a blocker

[miaulalala]

@nimishavijay new screenshots 👀

[Antreesy]

It has a common icon with drafts, not sure it's not blending for the user. Maybe "Export as a draft" and "Export results"?

[miaulalala]

@nimishavijay if you have any icon suggestions, let me know. I would also add back a separator "Results" to give some context to the download options without the button test being overly long. Since it's only two items now, I don't think a submenu is needed. Wdyt?

[nickvergessen]

I would also add back a separator "Results" to give some context to the download options without the button test being overly long. Since it's only two items now, I don't think a submenu is needed.

Could add a separator + header inside the menu?