feat(settings): add explicit settings dir override for sandboxed runs

Add LORA_MANAGER_SETTINGS_DIR env var and standalone --settings-path to pin
the settings location (settings.json, cache/, wildcards/, backups/, logs/,
stats/) to an arbitrary directory. The override takes precedence over
portable mode and the platform user config dir, and skips legacy migration,
so sandboxed dev/E2E runs no longer need to write settings.json in the repo
root or collide with the real instance.

standalone.py pre-scans argv for --settings-path at import time because the
settings location is resolved before main() parses arguments. SettingsManager
portable-switch migration is a no-op while the directory is pinned.

Update the lora-manager-e2e skill (prefer --settings-path sandboxing;
start_server.py passes it through) and the lora-manager-runtime-context
skill (document precedence; inspect script honors the override).

.agents/skills/lora-manager-runtime-context/SKILL.md

@@ -9,7 +9,10 @@ description: Inspect ComfyUI LoRA Manager runtime configuration and local diagno
 
 - Treat runtime state as local user data. Prefer read-only inspection unless the user explicitly asks for mutation.
 - Never print secret-like settings values. Redact keys containing `key`, `token`, `secret`, `password`, `auth`, or `credential`, including `civitai_api_key`.
-- Resolve paths from the runtime configuration before guessing. In this environment the settings file is normally `/home/miao/.config/ComfyUI-LoRA-Manager/settings.json`, but portable settings can override this through the repository `settings.json`.
+- Resolve paths from the runtime configuration before guessing. Settings-directory precedence (highest first):
+  1. **Explicit override** — env `LORA_MANAGER_SETTINGS_DIR` or standalone `--settings-path` (also accepted by the inspect script as `--settings-path DIR`). Pins EVERYTHING (`settings.json`, `cache/`, `wildcards/`, `backups/`, `logs/`, `stats/`) under the given directory; bypasses portable mode and the user config dir. Common when inspecting a sandboxed/E2E instance.
+  2. **Portable** — repository `<repo-root>/settings.json` with `"use_portable_settings": true` (or `LORA_MANAGER_PORTABLE=1`): settings dir = `<repo-root>`.
+  3. **Default** — `~/.config/ComfyUI-LoRA-Manager` on this machine (`platformdirs.user_config_dir("ComfyUI-LoRA-Manager", appauthor=False)`).
 - Use the active library when selecting per-library caches and paths. Read `active_library` from settings; fall back to `default` if missing.
 - Normalize and expand `~` before comparing paths. Symlinks are common in this repo.
 
@@ -32,9 +35,17 @@ python .agents/skills/lora-manager-runtime-context/scripts/inspect_runtime_conte
 python .agents/skills/lora-manager-runtime-context/scripts/inspect_runtime_context.py sqlite --db /path/to/cache.sqlite --limit 3
 ```
 
+To inspect a sandboxed/E2E instance that pins its settings directory:
+
+```bash
+# --settings-path DIR (or LORA_MANAGER_SETTINGS_DIR) works with every subcommand:
+python .agents/skills/lora-manager-runtime-context/scripts/inspect_runtime_context.py \
+  --settings-path /tmp/opencode/<plan>-e2e/settings summary
+```
+
 ## Runtime Path Rules
 
-- Settings directory: use `py/utils/settings_paths.py`. Default platform path is `platformdirs.user_config_dir("ComfyUI-LoRA-Manager", appauthor=False)`.
+- Settings directory: resolve via `py/utils/settings_paths.py` — `get_settings_dir()` honors the `LORA_MANAGER_SETTINGS_DIR` / programmatic override first, then portable mode, then `platformdirs.user_config_dir("ComfyUI-LoRA-Manager", appauthor=False)`. The inspect script mirrors this precedence in `resolve_settings_path()`.
 - Settings file: `<settings_dir>/settings.json`.
 - Cache root: `<settings_dir>/cache`.
 - Canonical cache files:

.agents/skills/lora-manager-runtime-context/scripts/inspect_runtime_context.py

@@ -14,6 +14,7 @@ from typing import Any
 
 SECRET_PATTERN = re.compile(r"(key|token|secret|password|auth|credential)", re.IGNORECASE)
 APP_NAME = "ComfyUI-LoRA-Manager"
+SETTINGS_DIR_ENV = "LORA_MANAGER_SETTINGS_DIR"
 CACHE_SQLITE = {
     "model": ("model", "{library}.sqlite"),
     "recipe": ("recipe", "{library}.sqlite"),
@@ -30,6 +31,15 @@ CACHE_JSON = {
 
 def main() -> int:
     parser = argparse.ArgumentParser(description="Inspect LoRA Manager runtime state read-only.")
+    parser.add_argument(
+        "--settings-path",
+        type=str,
+        default=None,
+        metavar="DIR",
+        help="Explicit settings directory (same as LORA_MANAGER_SETTINGS_DIR / "
+        "standalone --settings-path). Overrides portable mode and the default "
+        "user config dir.",
+    )
     subparsers = parser.add_subparsers(dest="command", required=True)
 
     subparsers.add_parser("summary", help="Print redacted settings and resolved paths.")
@@ -44,6 +54,8 @@ def main() -> int:
     sqlite_parser.add_argument("--limit", type=int, default=3, help="Rows to sample from each user table.")
 
     args = parser.parse_args()
+    if args.settings_path:
+        os.environ[SETTINGS_DIR_ENV] = args.settings_path
     context = build_context()
 
     if args.command == "summary":
@@ -78,6 +90,11 @@ def build_context() -> dict[str, Any]:
 
 
 def resolve_settings_path() -> Path:
+    # Explicit override: LORA_MANAGER_SETTINGS_DIR env or --settings-path.
+    explicit = os.environ.get(SETTINGS_DIR_ENV)
+    if explicit:
+        return Path(explicit).expanduser() / "settings.json"
+
     repo_root = find_repo_root()
     portable = repo_root / "settings.json"
     if portable.exists():