fix(deploy): single-line progress bar (no fragile cursor moves)

- previous 2-line render with \033[1A broke when xcodebuild crashed
  early — left mangled output and lost stderr
- new render_progress: ONE line, truncated to $COLUMNS, no cursor moves
- indeterminate mode (no baseline) shows ping-pong bar instead of spinner
- removes 2-line reserve + clear logic in run_quiet

apps/rebreak-native/deploy.sh

@@ -112,42 +112,39 @@ runtime_save() {
   echo "$label|$duration" >> "$RUNTIME_CACHE"
 }
 
-# Render brew-style progress bar: ████████░░░░░░░░  42% (1m23s / ~3m18s)
+# Render brew-style SINGLE-LINE progress bar:
+# ==> Building xcarchive  ████████░░░░░░░░  42% (1m23s/~3m18s) ↳ CompileSwift Foo
 render_progress() {
   local elapsed="$1" expected="$2" label="$3" subtitle="$4"
-  local width=30 pct filled empty bar elapsed_h expected_h
+  local width=20 pct filled empty bar elapsed_h expected_h line
   if (( expected > 0 )); then
     pct=$(( elapsed * 100 / expected ))
-    (( pct > 99 )) && pct=99  # never show 100% while still running
+    (( pct > 99 )) && pct=99
     filled=$(( elapsed * width / expected ))
     (( filled > width )) && filled=$width
   else
-    pct=0; filled=0
+    # No baseline — animated indeterminate bar position
+    pct=0
+    filled=$(( RUN_QUIET_I % (width * 2) ))
+    (( filled > width )) && filled=$(( width * 2 - filled ))
   fi
   empty=$(( width - filled ))
   bar=$(printf '%*s' "$filled" '' | tr ' ' '█')$(printf '%*s' "$empty" '' | tr ' ' '░')
   elapsed_h=$(format_duration "$elapsed")
   if (( expected > 0 )); then
     expected_h=$(format_duration "$expected")
-    if [[ -n "$subtitle" ]]; then
+    line=$(printf '%s==>%s %s  %s %s%3d%%%s (%s/~%s)' \
-      printf '\r\033[K%s==>%s %s\n   %s %s%3d%%%s (%s / ~%s)  %s%s↳ %s%s\033[1A' \
+      "$BLUE" "$RESET" "$label" "$bar" "$YELLOW" "$pct" "$RESET" "$elapsed_h" "$expected_h")
-        "$BLUE" "$RESET" "$label" "$bar" "$YELLOW" "$pct" "$RESET" "$elapsed_h" "$expected_h" "$BLUE" "$BOLD" "$subtitle" "$RESET" >&2
-    else
-      printf '\r\033[K%s==>%s %s\n   %s %s%3d%%%s (%s / ~%s)\033[1A' \
-        "$BLUE" "$RESET" "$label" "$bar" "$YELLOW" "$pct" "$RESET" "$elapsed_h" "$expected_h" >&2
-    fi
   else
-    # No baseline yet — spinner mode
+    line=$(printf '%s==>%s %s  %s %s(%s)%s' \
-    local spin='⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏'
+      "$BLUE" "$RESET" "$label" "$bar" "$YELLOW" "$elapsed_h" "$RESET")
-    local frame="${spin:RUN_QUIET_I%10:1}"
-    if [[ -n "$subtitle" ]]; then
-      printf '\r\033[K%s %s==>%s %s %s(%s)%s  ↳ %s' \
-        "$frame" "$BLUE" "$RESET" "$label" "$YELLOW" "$elapsed_h" "$RESET" "$subtitle" >&2
-    else
-      printf '\r\033[K%s %s==>%s %s %s(%s)%s' \
-        "$frame" "$BLUE" "$RESET" "$label" "$YELLOW" "$elapsed_h" "$RESET" >&2
-    fi
   fi
+  if [[ -n "$subtitle" ]]; then
+    line="$line  ↳ $subtitle"
+  fi
+  # Truncate to terminal width to avoid line-wrap garbling the redraw
+  local cols=${COLUMNS:-$(tput cols 2>/dev/null || echo 120)}
+  printf '\r\033[K%s' "${line:0:cols}" >&2
 }
 
 format_duration() {
@@ -182,10 +179,6 @@ run_quiet() {
   RUN_QUIET_I=0
   ( "$@" >"$logfile" 2>&1 ) &
   pid=$!
-  # If we have a baseline, render 2-line bar (label + bar); else 1-line spinner.
-  if (( expected > 0 )); then
-    printf '\n\033[1A' >&2  # Reserve second line, then move up
-  fi
   while kill -0 "$pid" 2>/dev/null; do
     elapsed=$((SECONDS - start))
     RUN_QUIET_I=$((RUN_QUIET_I + 1))
@@ -203,12 +196,8 @@ run_quiet() {
   wait "$pid"
   local rc=$?
   elapsed=$((SECONDS - start))
-  # Clear both lines if we used 2-line mode, else 1 line
+  # Clear progress line
-  if (( expected > 0 )); then
+  printf '\r\033[K' >&2
-    printf '\r\033[K\n\033[K\033[1A' >&2
-  else
-    printf '\r\033[K' >&2
-  fi
   if [[ $rc -eq 0 ]]; then
     ok "$label ${YELLOW}($(format_duration "$elapsed"))${RESET}"
     runtime_save "$label" "$elapsed"