v0.8.0: TUI simplification — process-key-event, with-frame, inline reader

Replace queue-based key dispatch with process-key-event (inline in reader,
zero latency between keypress and render).
Add with-frame to cl-tty.backend (error-safe begin-sync/end-sync wrapper).
Use with-frame in redraw instead of manual begin-sync/end-sync.
Add initial render before main loop (UI appears before first read-event).
Remove position-cursor (replaced by inline block cursor in view-input).
Remove input-string/input-insert-char/input-delete-char wrappers.
Remove :input-buffer/:cursor-pos from state (managed by text-input widget).
passepartout script: set *debugger-hook* nil and failure-behaviour :warn
before quickload to survive compile warnings; remove cache-clear line.

org/channel-tui-state.org

@@ -20,10 +20,9 @@ All state mutation flows through event handlers in the controller.
 #+BEGIN_SRC lisp :tangle /home/user/.local/share/passepartout/lisp/channel-tui-state.lisp
 (defpackage :passepartout.channel-tui
   (:use :cl :passepartout :usocket :bordeaux-threads)
-  (:export :tui-main :st :add-msg :now :input-string
+  (:export :tui-main :st :add-msg :now
            :queue-event :drain-queue :init-state
             :view-status :view-chat :view-input :redraw
-            :position-cursor
             :input-panel-top
            :on-key :on-daemon-msg :send-daemon
            :connect-daemon :disconnect-daemon
@@ -310,11 +309,10 @@ Adds any missing keys with defaults to handle saved themes from older versions."
 (defun init-state ()
   (setf *state*
         (list :running t :mode :chat :connected nil :stream nil
-              :input-buffer nil :input-history nil :input-hpos 0
+              :input-history nil :input-hpos 0
               :text-input (cl-tty.input:make-text-input)
               :messages (make-array 16 :adjustable t :fill-pointer 0)
-               :scroll-offset 0 :busy nil :cursor-pos 0
-               :cursor-line 0 :cursor-col 0
+               :scroll-offset 0 :busy nil
               :pending-ctrl-x nil
               :scroll-at-bottom t :scroll-notify nil
               :streaming-text nil :url-buffer nil            ; v0.7.1
@@ -342,15 +340,6 @@ Adds any missing keys with defaults to handle saved themes from older versions."
     (declare (ignore s))
     (format nil "~2,'0d:~2,'0d" h m)))
 
-(defun input-string ()
-  (cl-tty.input:text-input-value (st :text-input)))
-
-(defun input-insert-char (ch)
-  (cl-tty.input:text-input-insert (st :text-input) ch))
-
-(defun input-delete-char ()
-  (cl-tty.input:text-input-backspace (st :text-input)))
-
 (defun add-msg (role content &key gate-trace panel)
   (vector-push-extend (list :role role :content content :time (now) :gate-trace gate-trace :panel panel) (st :messages))
   ;; v0.7.0: notify when scrolled up and new msg arrives