Watch: review fixes for action errors that vanished, feed refreshes dropped or overwritten around a change, a fresh thread screen per route, errors cleared on sign out, notification actions only while paired, cache writes off the main thread and capped at 30 threads, Ask before acting and Load earlier races, two-letter search, C# headings, and strictly encoded query values

watch/WristCode/Views/Markdown.swift

@@ -30,7 +30,8 @@ enum Markdown {
 
     /// One line with its block syntax rewritten as inline markdown or plain text.
     static func block(_ line: String) -> String {
-        if let heading = line.wholeMatch(of: /\s{0,3}#{1,6}\s+(.+?)[\s#]*/) {
+        // A closing run of #s goes only after a space, so "C#" keeps its #.
+        if let heading = line.wholeMatch(of: /\s{0,3}#{1,6}\s+(.+?)(?:\s+#+)?\s*/) {
             return "**\(heading.1)**"
         }
         if let item = line.wholeMatch(of: /(\s*)[-*+]\s+(.*)/) {