revert(shell): move iris integration to the iris branch

Reverts 43dfe48, 0692ae3, e0cdcd6 and the cable-description half of
098da70 (the star-prompt stats stay). master returns to the pre-iris
shell setup: atuin in fish/zsh/bash, the down -> pj binding with
PJ_QUIET, and the fish/zsh key bindings as they were. The iris work
lives on the `iris` branch.

dot_config/fish/functions/_bind_run.fish

@@ -1,6 +0,0 @@
-function _bind_run --description 'run a command from a key binding (iris-aware), then repaint'
-    _iris_busy start
-    $argv
-    _iris_busy stop
-    commandline -f repaint
-end

dot_config/fish/functions/_gho_bind.fish

@@ -1,8 +1,6 @@
 function _gho_bind --description 'ctrl-o: gho (tv --inline), then redraw the prompt in the right place'
     set -l before $PWD
-    _iris_busy start
     gho
-    _iris_busy stop
     if test "$PWD" = "$before"
         # Cancelled (or the nvim action ran): tv --inline left the cursor on
         # the line below the prompt; step back so repaint redraws in place.

dot_config/fish/functions/_iris_busy.fish

@@ -1,15 +0,0 @@
-function _iris_busy --description 'tell iris a key binding is running a program (start|stop)'
-    # iris (~/.config/iris) learns a command is running from fish_preexec /
-    # fish_postexec, which never fire for programs a key binding starts. Without
-    # this, iris keeps treating the screen as an idle prompt while tv, yazi or
-    # lazygit run: it swallows up/down/tab and can draw its menu over them.
-    # Same messages as iris's own hooks; a no-op outside iris.
-    set -q IRIS_FD; or return 0
-    switch "$argv[1]"
-        case start
-            printf 'IRIS_CMD_START\x00' >&$IRIS_FD 2>/dev/null
-        case stop
-            printf 'IRIS_CMD_STOP:0\x00' >&$IRIS_FD 2>/dev/null
-    end
-    return 0
-end

dot_config/fish/functions/_pj_bind.fish

@@ -1,13 +1,14 @@
-function _pj_bind --description 'ctrl-p: pj (tv --inline), then redraw the prompt in the right place'
+function _pj_bind --description 'ctrl-p / down: pj (tv --inline), then redraw the prompt in the right place'
     # pj reports through $PJ_STATE: `open` = the picker was cancelled and
     # left the cursor on the line below the prompt; empty = no task sources,
     # nothing drawn — but fish's repaint after an external command still
     # lands one line low, so both step back up. `ran` = a task printed
     # output: new line, prompt below it.
     set -lx PJ_STATE (mktemp)
-    _iris_busy start
+    if contains -- --quiet $argv
+        set -lx PJ_QUIET 1
+    end
     pj
-    _iris_busy stop
     set -l state (cat $PJ_STATE)
     switch "$state"
         case open ''

dot_config/fish/functions/_pj_bind_down.fish

@@ -0,0 +1,21 @@
+function _pj_bind_down --description "down arrow: pj tv cable on an idle empty prompt, else fish's down-or-search"
+    # Mirror of atuin's up binding (atuin owns up, this owns down). Everything
+    # that legitimately needs the arrow keys keeps them:
+    #   - non-empty buffer  → multiline cursor movement / forward history search
+    #   - paging mode       → tab-completion pager navigation (tab on an empty
+    #                         line opens the pager with an empty buffer)
+    #   - search mode       → history-search navigation
+    # down-or-search is fish's own input function, called as a command exactly
+    # the way atuin's _atuin_bind_up calls up-or-search.
+    set -l buf (commandline | string collect)
+    if test -n "$buf"; or commandline --paging-mode; or commandline --search-mode
+        down-or-search
+        return
+    end
+
+    # _pj_bind runs ~/.local/bin/pj (also ctrl-p), which opens the `pj` tv
+    # cable. --quiet (PJ_QUIET) keeps it silent when the tree has no task
+    # source at all, so down is a no-op outside projects instead of printing
+    # an error per press.
+    _pj_bind --quiet
+end

dot_config/fish/functions/_tv_inline.fish

@@ -3,10 +3,8 @@ function _tv_inline --description 'tv --inline below the prompt, cursor back on
     # its own first row when it exits; step back up so the following
     # `commandline -f repaint` redraws the prompt in place instead of one line
     # lower. /dev/tty keeps the move out of callers that capture stdout (gho).
-    _iris_busy start
     tv $argv --inline
     set -l st $status
-    _iris_busy stop
     printf '\033[A' >/dev/tty
     return $st
 end

dot_config/fish/functions/fish_user_key_bindings.fish

@@ -10,29 +10,33 @@ function fish_user_key_bindings
         # Keys owned by kitty.conf never reach fish and are NOT bound here:
         #   ctrl-g → lazygit overlay, ctrl-y → yazi vsplit,
         #   ctrl-h/j/k/l → vim-aware split nav (pass_keys.py).
-        # ctrl-e: tv git-files (bat preview, enter opens nvim). ctrl-o and
-        # ctrl-p also open tv cables — same keys in zsh and bash. tv runs
+        # ctrl-e: tv git-files (bat preview, enter opens nvim). ctrl-o, ctrl-p
+        # and down also open tv cables — same keys in zsh and bash. tv runs
         # --inline below the prompt; _tv_inline/_gho_bind/_pj_bind put the
         # prompt back in place (or below any output) afterwards. ctrl-a:
         # omp-session resumes or starts omp for the repo (same in zsh); when it
         # opens the omp-sessions cable and it is cancelled, it steps back up.
-        # Every binding that runs a program tells iris via _iris_busy
-        # (_bind_run, _tv_inline, _gho_bind, _pj_bind), or iris would keep
-        # its prompt key handling while tv/yazi/lazygit own the screen.
         bind -M $mode ctrl-e '_tv_inline git-files; commandline -f repaint'
-        bind -M $mode ctrl-b '_bind_run purple'
-        bind -M $mode ctrl-y '_bind_run clip-last'
+        bind -M $mode ctrl-b purple repaint
+        bind -M $mode ctrl-y clip-last
 
         bind -M $mode ctrl-o _gho_bind
         bind -M $mode ctrl-p _pj_bind
-        bind -M $mode ctrl-a '_bind_run omp-session'
+        bind -M $mode ctrl-a 'omp-session; commandline -f repaint'
+        bind -M $mode ctrl-w 'atuin ai inline; commandline -f repaint'
         # ctrl-z at the prompt: fg the only background job, or pick one from
         # the jobs tv cable when there are several (_jobs_bind).
         bind -M $mode ctrl-z _jobs_bind
 
+        # Arrow keys: atuin owns up (bound from config.fish, survives the
+        # fish_vi_key_bindings reset above because that only erases presets),
+        # down opens the pj tv cable — but only on an idle, empty prompt; see
+        # _pj_bind_down.
+        bind -M $mode down _pj_bind_down
+
         # ctrl-f: yazi (cd's to yazi's exit dir on quit).
-        bind -M $mode ctrl-f '_bind_run yy'
-        bind -M $mode ctrl-g '_bind_run lazygit'
+        bind -M $mode ctrl-f 'yy; commandline -f repaint'
+        bind -M $mode ctrl-g 'lazygit; commandline -f repaint'
 
         # ctrl-c routes through the clear wrapper (kitty scrollback + prompt
         # pinned to the bottom) AND wipes any text typed on the command line.