Polls, quotes and edits from the composer

The composer can hold a poll instead of media (two to four choices, a
length, one choice or several), quote a post (offered on a card when the
server says the persona may quote it), and edit the persona's own post: its
words and warning come from /source, and saving keeps its media,
visibility and poll. A card's menu offers Edit and Quote, and now opens
sideways: upwards, the first card's menu was cut off by the top of the
feed. The e2e tests publish a poll, edit a post and quote it, each checked
on PrivaPub.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

Models/ComposeForm.cs

@@ -37,6 +37,15 @@ public class ComposeForm
 	public double? Latitude { get; set; }
 	public double? Longitude { get; set; }
 
+	/// <summary>A poll instead of media: two to four choices, open ExpiresIn seconds, one choice or several.</summary>
+	public bool HasPoll { get; set; }
+	public List<string> PollOptions { get; set; } = ["", ""];
+	public int PollExpiresIn { get; set; } = 86400;
+	public bool PollMultiple { get; set; }
+
+	/// <summary>The post this one quotes.</summary>
+	public string QuotedStatusId { get; set; }
+
 	/// <summary>Whether the post waits for ScheduledAt (a datetime-local value, the reader's own time) instead of going now.</summary>
 	public bool IsScheduled { get; set; }
 	public string ScheduledAt { get; set; }