fix: .env contains harb-specific defaults that leak into non-harb sessions (#398)

Remove per-project settings from .env.example and env.sh defaults:
- CODEBERG_REPO no longer defaults to johba/harb
- WOODPECKER_REPO_ID no longer defaults to 2
- Remove deprecated HARB_REPO_ROOT alias
- .env.example now points to projects/*.toml for per-project config

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.env.example

@@ -2,11 +2,10 @@
 # Copy to .env and fill in your values.
 # NEVER commit .env to the repo.
 
-# ── Target project ────────────────────────────────────────────────────────
-CODEBERG_REPO=johba/yourproject            # org/repo slug on Codeberg
-PROJECT_REPO_ROOT=/home/you/yourproject    # local clone of the target repo
-PRIMARY_BRANCH=main                        # main or master
-# PROJECT_NAME=yourproject                 # optional — auto-derived from CODEBERG_REPO
+# ── Per-project config ────────────────────────────────────────────────────
+# Project-specific settings (CODEBERG_REPO, PROJECT_REPO_ROOT, PRIMARY_BRANCH,
+# WOODPECKER_REPO_ID) now live in projects/*.toml — see projects/harb.toml
+# for an example. Do NOT set them here; they leak into every session.
 
 # ── Auth tokens ───────────────────────────────────────────────────────────
 # Dev-agent token: push branches, create PRs, merge PRs.
@@ -22,7 +21,7 @@ REVIEW_BOT_TOKEN=
 # ── Woodpecker CI ─────────────────────────────────────────────────────────
 WOODPECKER_TOKEN=
 WOODPECKER_SERVER=http://localhost:8000
-WOODPECKER_REPO_ID=2                       # numeric repo ID in Woodpecker DB
+# WOODPECKER_REPO_ID — now per-project, set in projects/*.toml [ci] section
 
 # Woodpecker Postgres (for direct DB queries)
 WOODPECKER_DB_PASSWORD=

lib/env.sh

@@ -31,14 +31,13 @@ fi
 export CODEBERG_TOKEN
 
 # Project config
-export CODEBERG_REPO="${CODEBERG_REPO:-johba/harb}"
+export CODEBERG_REPO="${CODEBERG_REPO:-}"
 export CODEBERG_API="${CODEBERG_API:-https://codeberg.org/api/v1/repos/${CODEBERG_REPO}}"
 export CODEBERG_WEB="https://codeberg.org/${CODEBERG_REPO}"
 export PROJECT_NAME="${PROJECT_NAME:-${CODEBERG_REPO##*/}}"
-export PROJECT_REPO_ROOT="${PROJECT_REPO_ROOT:-${HARB_REPO_ROOT:-/home/${USER}/${PROJECT_NAME}}}"
-export HARB_REPO_ROOT="${PROJECT_REPO_ROOT}"  # deprecated alias
+export PROJECT_REPO_ROOT="${PROJECT_REPO_ROOT:-/home/${USER}/${PROJECT_NAME}}"
 export PRIMARY_BRANCH="${PRIMARY_BRANCH:-master}"
-export WOODPECKER_REPO_ID="${WOODPECKER_REPO_ID:-2}"
+export WOODPECKER_REPO_ID="${WOODPECKER_REPO_ID:-}"
 export WOODPECKER_SERVER="${WOODPECKER_SERVER:-http://localhost:8000}"
 export CLAUDE_TIMEOUT="${CLAUDE_TIMEOUT:-7200}"