fix(tmux): always-on Neovim-style NORMAL/VISUAL mode indicator

NORMAL = always visible when working in tmux (green)
VISUAL = switches in when entering copy-mode via prefix+Enter (blue)

Uses pane-mode-changed hook with -F flag for clean format evaluation.
Default @mode_indicator set to NORMAL on config load.

tmux/.tmux.conf.local

@@ -366,36 +366,22 @@ source-file "/Users/jsarthak/dotfiles/tmux/config/keybindings.conf"
 
 setw -g window-status-separator " #[fg=#484848]• " #!important
 
-# ── Mode indicators via hooks ─────────────────────────────────────────────────
-# oh-my-tmux's awk pipeline mangles #{?pane_in_mode,...} inline conditionals,
-# so we drive @mode_indicator via hooks instead.
+# ── Mode indicator (always-on, Neovim-style) ──────────────────────────────────
+# NORMAL = working in tmux (default, always visible)
+# VISUAL = in copy-mode (prefix + Enter)
 #
-# Clear indicator when exiting copy-mode
-set-hook -g pane-mode-changed \
-  'if-shell "tmux display-message -p \"#{pane_in_mode}\" | grep -q 1" \
-    "" \
-    "set-window-option -g @mode_indicator \"\""'
-#
-# NORMAL mode (entered copy-mode, no selection yet)
-bind-key -T copy-mode-vi Escape { send -X cancel; set-window-option -g @mode_indicator "" }
-bind-key -T copy-mode-vi v {
-  send -X begin-selection
-  set-window-option -g @mode_indicator "#[fg=#78a9ff,bold] VISUAL "
-}
-bind-key -T copy-mode-vi y {
-  send -X copy-selection-and-cancel
-  set-window-option -g @mode_indicator ""
-}
-# Set NORMAL indicator on copy-mode entry (overrides keybindings.conf Enter bind)
-bind Enter {
-  copy-mode
+# #{@mode_indicator} is a window user-option set via pane-mode-changed hook.
+# We use -F flag so #{pane_in_mode} is evaluated as a tmux format (1=in mode).
+# This bypasses oh-my-tmux's awk pipeline which mangles inline #{?...} conditionals.
+
+# Set NORMAL as the default on startup
 set-window-option -g @mode_indicator "#[fg=#25be6a,bold] NORMAL "
-}
-bind -T root MouseDrag1Pane {
-  if-shell -F "#{||:#{pane_in_mode},#{mouse_any_flag}}" \
-    "send-keys -M" \
-    "copy-mode -e; set-window-option -g @mode_indicator \"#[fg=#25be6a,bold] NORMAL \""
-}
+
+# Switch between NORMAL and VISUAL whenever the pane mode changes
+set-hook -g pane-mode-changed \
+  'if-shell -F "#{pane_in_mode}" \
+    "set-window-option -g @mode_indicator \"#[fg=#78a9ff,bold] VISUAL \"" \
+    "set-window-option -g @mode_indicator \"#[fg=#25be6a,bold] NORMAL \""'
 
 # ── Per-machine local override (untracked) ────────────────────────────────────
 # Create ~/.tmux.conf.machine.local on each machine for host-specific tweaks