Initial version: dlp.py orchestrates Discord export, link extraction and host-aware downloads

- dlphelper/discord.py: DCE docker export (JSON) + base64/plain URL extraction
  (extraction regex kept compatible with parts/grab.sh)
- dlphelper/gofile.py: GoFile client adapted from Lysagxra/GoFileDownloader's
  API scheme, but ONE guest account per run and per-file failure tracking
  instead of sys.exit - fixes the rate-limit death after ~6 downloads
- dlphelper/zero807.py: curl downloader with the UA+Referer contract 0807.st
  requires; .part files for resumable downloads
- dlphelper/state.py: state.json (resume/skip) + manifest.jsonl (torrent stage
  later) + failed_urls.txt
- tools/new_repo.py: Gitea repo helper reading ~/.git-credentials itself
- AGENTS.md with agent rules, README, offline extraction test

parts/grab.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+THREAD_ID="${THREAD_ID:-1455993943471820842}"
+OUT_DIR="${OUT_DIR:-$PWD/thread}"
+HTML="$OUT_DIR/export.html"
+URLS="$OUT_DIR/urls.txt"   # aria2c input file: one URL per line
+
+# Token from env, otherwise prompt (input hidden)
+if [[ -z "${DISCORD_TOKEN:-}" ]]; then
+  read -rsp "Discord token: " DISCORD_TOKEN
+  echo
+fi
+
+mkdir -p "$OUT_DIR"
+
+# 1. Export the thread to HTML
+docker run --rm --user "$(id -u):$(id -g)" \
+  -v "$OUT_DIR:/out" \
+  tyrrrz/discordchatexporter:stable export \
+  -t "$DISCORD_TOKEN" -c "$THREAD_ID" -f HtmlDark -o /out/export.html
+
+unset DISCORD_TOKEN
+
+# 2. Find base64 strings starting with "https://", then decode them
+grep -oP 'aHR0cHM6Ly[89][A-Za-z0-9+/_-]*' "$HTML" \
+  | sort -u \
+  | while read -r s; do
+      s=$(printf '%s' "$s" | tr '_-' '/+' | tr -d '=')
+      while (( ${#s} % 4 )); do s="$s="; done
+      printf '%s' "$s" | base64 -d 2>/dev/null | tr -d '\r\n' || true
+      echo
+    done \
+  | grep -E '^https://[[:graph:]]+$' \
+  | awk '!seen[$0]++' > "$URLS"
+
+echo "Found $(wc -l < "$URLS") URLs -> $URLS"
+echo "Download with: aria2c -i \"$URLS\" -d \"$OUT_DIR/downloads\""