Add Craigslist mirror

[FlowRays]

Summary

Adds a Craigslist mirror to WebHarbor on port 40015.

Real site mirrored: https://www.craigslist.org/

The mirror covers Craigslist-style category browsing, search, listing detail pages, posting, replies, login, account edits, saved listings, saved searches, hidden listings, and messages. It includes 20 benchmark tasks across for-sale, housing, jobs, services, community pages, and account workflows.

The search UI was checked against live Craigslist for list, thumb, and gallery views, including icon font usage, card sizing, and image/no-image states.

Seed Data

categories: 34
listings: 179
users: 4
messages: 2
saved_listings: 3
saved_searches: 2
tasks: 20

Listings by group:

community: 35
for_sale: 48
housing: 29
jobs: 34
services: 33

Assets

HF asset PR: https://huggingface.co/datasets/ChilleD/WebHarbor/discussions/5

It uploads craigslist.tar.gz with the seed DB and image assets.

craigslist.tar.gz: 638961 bytes
md5: b3209befab877f7b749d58669821055c

This GitHub PR is still draft while the HF asset PR is pending. After that PR is merged, .assets-revision should be pinned to the HF merge commit and this PR can be marked ready.

Verification

python3 -m py_compile sites/craigslist/app.py sites/craigslist/seed_data.py
./scripts/build.sh webharbor:dev

GET /health on a clean container: ok=true, all 16 sites alive
Site roots: 41000:200 ... 41015:200

POST /reset/craigslist
{"pid":141,"ready":true,"site":"craigslist"}

edcfc946b3e0a082ded90df615396e63  /opt/WebSyn/craigslist/instance/craigslist.db
edcfc946b3e0a082ded90df615396e63  /opt/WebSyn/craigslist/instance_seed/craigslist.db

Also checked in Playwright at 2048x1090: header, query bar, toolbar, view selector, gallery cards, and image areas line up with the live Craigslist measurements; icomoon.css loads and there were no broken images.