feat: dynamic repo count in configure_env.sh wizard

Replace 3 hardcoded REPO_N_NAME prompts with:
- "How many repos?" prompt
- Loop for each repo name
- Saves as space-delimited REPO_NAMES in .env
TOTAL_PROMPTS computed dynamically after repo count is known.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

setup/configure_env.sh

@@ -64,7 +64,8 @@ get_env_val() {
 # ---------------------------------------------------------------------------
 # Prompt function
 # ---------------------------------------------------------------------------
-TOTAL_PROMPTS=56
+# Base prompt count (fixed prompts only — repo prompts added dynamically)
+TOTAL_PROMPTS=53
 CURRENT_PROMPT=0
 LAST_SECTION=""
 
@@ -262,9 +263,58 @@ prompt_var "BACKUP_RETENTION_COUNT"       "Number of backup archives to keep"
 # --- REPOSITORIES ---
 prompt_var "GITHUB_USERNAME"    "GitHub username or org name"               nonempty  ""      "REPOSITORIES"
 prompt_var "GITHUB_TOKEN"       "GitHub PAT with repo scope (read+write)"   nonempty  ""      "REPOSITORIES"
-prompt_var "REPO_1_NAME"        "First repo name (exact match)"             nonempty  ""      "REPOSITORIES"
-prompt_var "REPO_2_NAME"        "Second repo name (exact match)"            nonempty  ""      "REPOSITORIES"
-prompt_var "REPO_3_NAME"        "Third repo name (exact match)"             nonempty  ""      "REPOSITORIES"
+# Dynamic repo collection — ask how many, then prompt for each
+printf '\n%b── REPOSITORIES ─────────────────────────────────────────%b\n' "$C_BOLD" "$C_RESET"
+LAST_SECTION="REPOSITORIES"
+
+# Determine existing repo count from .env
+EXISTING_REPOS=$(get_env_val "REPO_NAMES" "")
+EXISTING_COUNT=0
+if [[ -n "$EXISTING_REPOS" ]]; then
+  # shellcheck disable=SC2086
+  set -- $EXISTING_REPOS
+  EXISTING_COUNT=$#
+fi
+
+CURRENT_PROMPT=$((CURRENT_PROMPT + 1))
+printf '%b[%d/~%d]%b How many repos to migrate? %b[%s]%b: ' "$C_DIM" "$CURRENT_PROMPT" "$TOTAL_PROMPTS" "$C_RESET" "$C_YELLOW" "${EXISTING_COUNT:-3}" "$C_RESET"
+read -r REPO_COUNT
+if [[ -z "$REPO_COUNT" ]]; then REPO_COUNT="${EXISTING_COUNT:-3}"; fi
+while ! [[ "$REPO_COUNT" =~ ^[1-9][0-9]*$ ]]; do
+  printf '%b  Invalid: must be a positive integer%b\n' "$C_RED" "$C_RESET"
+  printf 'How many repos to migrate? '
+  read -r REPO_COUNT
+done
+# Update total now that we know how many repos
+TOTAL_PROMPTS=$((TOTAL_PROMPTS + 1 + REPO_COUNT))
+
+# Collect repo names
+COLLECTED_REPOS=""
+# shellcheck disable=SC2086
+set -- $EXISTING_REPOS
+for ((i = 1; i <= REPO_COUNT; i++)); do
+  CURRENT_PROMPT=$((CURRENT_PROMPT + 1))
+  local_default="${1:-}"
+  shift 2>/dev/null || true
+  if [[ -n "$local_default" ]]; then
+    printf '%b[%d/~%d]%b Repo %d name %b[%s]%b: ' "$C_DIM" "$CURRENT_PROMPT" "$TOTAL_PROMPTS" "$C_RESET" "$i" "$C_YELLOW" "$local_default" "$C_RESET"
+  else
+    printf '%b[%d/~%d]%b Repo %d name: ' "$C_DIM" "$CURRENT_PROMPT" "$TOTAL_PROMPTS" "$C_RESET" "$i"
+  fi
+  read -r repo_name
+  if [[ -z "$repo_name" ]]; then repo_name="$local_default"; fi
+  while [[ -z "$repo_name" ]]; do
+    printf '%b  Invalid: repo name cannot be empty%b\n' "$C_RED" "$C_RESET"
+    printf 'Repo %d name: ' "$i"
+    read -r repo_name
+  done
+  if [[ -n "$COLLECTED_REPOS" ]]; then
+    COLLECTED_REPOS="${COLLECTED_REPOS} ${repo_name}"
+  else
+    COLLECTED_REPOS="${repo_name}"
+  fi
+done
+write_env_var "REPO_NAMES" "$COLLECTED_REPOS"
 prompt_var "MIGRATE_ISSUES"     "Migrate GitHub issues"                     bool      "false" "REPOSITORIES"
 prompt_var "MIGRATE_LABELS"     "Migrate GitHub labels"                     bool      "true"  "REPOSITORIES"
 prompt_var "MIGRATE_MILESTONES" "Migrate GitHub milestones"                 bool      "false" "REPOSITORIES"
@@ -319,7 +369,7 @@ printf '  Unraid:     %s@%s:%s\n' "$(get_env_val UNRAID_SSH_USER)" "$(get_env_va
 printf '  Fedora:     %s@%s:%s\n' "$(get_env_val FEDORA_SSH_USER)" "$(get_env_val FEDORA_IP)" "$(get_env_val FEDORA_SSH_PORT 22)"
 printf '  Gitea:      %s (admin: %s, password: ****)\n' "$(get_env_val GITEA_DOMAIN)" "$(get_env_val GITEA_ADMIN_USER)"
 printf '  Org:        %s\n' "$(get_env_val GITEA_ORG_NAME)"
-printf '  Repos:      %s, %s, %s\n' "$(get_env_val REPO_1_NAME)" "$(get_env_val REPO_2_NAME)" "$(get_env_val REPO_3_NAME)"
+printf '  Repos:      %s\n' "$(get_env_val REPO_NAMES)"
 printf '  TLS/SSL:    %s\n' "${COLLECTED_SSL_MODE}"
 printf '  .env saved: %s\n\n' "$ENV_FILE"