v0.10.2: voice system — all speakers use │, neuro-thinking bg bar, blinking cursor

- Theme: added :agent-border, :thinking-bg, :symbolic-border to all 13
  presets with theme-load fallback for saved themes.
- Agent output now draws │ with :agent-border color (muted tan).
- Neuro-thinking (streaming): draw-rect at column 0 with :thinking-bg
  (dark grey block) instead of a grey │ character. No border text.
- Gate traces: │ with :symbolic-border (was ╎ with :dim).
- Tool calls: │ with tool status color (was ╎).
- Removed > prompt prefix from input line.
- Added position-cursor function: blinking block cursor at insertion
  point, called every frame from the main loop after sleep.

org/channel-tui-main.org

@@ -1065,8 +1065,10 @@ Returns T on success, nil on failure. Does NOT wait or retry."
                         (cl-tty.backend:draw-text be 0 (- h 3)
                                                   (format nil "> ~a" (or filter ""))
                                                   (theme-color :input-prompt) bg-p))
-                    (cl-tty.backend:end-sync be))
-                 (sleep 0.1)))
+                     (cl-tty.backend:end-sync be))
+                  (sleep 0.1)
+                  ;; Show cursor at input position every frame
+                  (passepartout.channel-tui:position-cursor be w h)))
                (progn (disconnect-daemon)))))
 #+END_SRC