feat(commands): wrap the /test caption in a blockquote (HTML report)

Replaces the strip-tags plain-text rendering: the /test reply is now an
HTML message (reply_html helper with ParseMode::Html). Raw fields (url,
source_url, title, author_url, media urls) are escaped, the pre-escaped
render fields are embedded as-is, and the caption is wrapped in
<blockquote>...</blockquote> so the report shows it exactly as it will
render in the sent media caption — escaped text and clickable links
included, no literal &amp;/&lt;/&gt; and no raw markup.

crates/xmedia-bot/src/handlers/mod.rs

@@ -22,7 +22,7 @@ use crate::media_sender::MediaSender;
 use commands::{Command, execute_command};
 use teloxide::RequestError;
 use teloxide::prelude::*;
-use teloxide::types::{ChatId, ChatKind, Message, MessageId, ParseMode};
+use teloxide::types::{ChatId, ChatKind, Message, MessageId, ParseMode, ReplyParameters};
 use teloxide::utils::command::BotCommands;
 use urls::{URL_JOBS, extract_urls};
 
@@ -42,6 +42,23 @@ where
         .await
 }
 
+/// Reply to a message by id with HTML parse mode (same reply decoration as
+/// [`reply`]). Used by `/test`, whose report is an HTML message (the caption
+/// is wrapped in a `<blockquote>` to show it exactly as it will render).
+pub(crate) async fn reply_html(
+    bot: &Bot,
+    chat_id: i64,
+    reply_to: MessageId,
+    text: String,
+) -> Result<Message, RequestError> {
+    // `<Bot as Requester>::` disambiguates from the MediaSender trait's
+    // same-named method (see media_sender.rs).
+    <Bot as Requester>::send_message(bot, ChatId(chat_id), text)
+        .parse_mode(ParseMode::Html)
+        .reply_parameters(ReplyParameters::new(reply_to).allow_sending_without_reply())
+        .await
+}
+
 /// Log prefix tying the whole lifecycle of one link (fetch → send → cache →
 /// forward) together: the normalized cache key (`twitter:123…`, `pixiv:123`,
 /// `bsky:handle/rkey`) instead of the raw URL, so logs stay short and do not