fix: install.sh loop abort, ACME poll sudo gate, /static/ sub-paths

- install.sh: the traversal-chmod loop assigned _d but looped over the
  never-set $d; under set -u every fresh install aborted with
  "d: unbound variable" at that line. Loop over $_d.
- acme collector: the self-heal normalize (sudo chmod g+rwX) now runs
  only when a no-sudo group-read-bit probe detects a lost bit — acme.sh
  re-hardens the tree 600 on every run, so the steady-state poll makes
  no sudo call. The group bit (not daemon readability) is what the
  two-user model keeps for the WebUI user.
- lib.acme: new get_acme_home() accessor (ACME_HOME env, default
  data/acme), reused by _run_acme; _summarize_acme_output preserves a
  "Permission denied" line even when it is not among the final two, so
  the collector's actionable-error matcher keeps firing.
- nginx template: emit location /static/ for any is_management path
  (not only '/'); the SPA references /static/... at the domain root
  regardless of the management backend path.
- tests: probe, summarizer, and nginx-subpath cases in
  test_state.py, test_acme.py, test_nginx.py.

daemon/collectors/acme.py

@@ -3,9 +3,11 @@
 import logging
 import os
 from pathlib import Path
+from stat import S_IRGRP
 from typing import Any
 
 from lib import schema
+from lib.acme import get_acme_home
 from lib.common import load_json
 from lib.state import PROJECT_DIR, _now_iso, register_collector
 
@@ -157,6 +159,25 @@ def _friendly_acme_error(exc: Exception) -> str:
     return text
 
 
+def _acme_home_needs_normalize() -> bool:
+    """Cheap no-sudo probe: has any ACME_HOME file lost its group-read bit?
+
+    acme.sh re-hardens its tree (``chmod 600``) on every run, so the daemon's
+    self-heal (``normalize_acme_home``) is only needed after a run by another
+    user (e.g. a manual run as the WebUI user) stripped group read. The probe
+    checks the group bit — not the daemon's own readability — because group
+    read is what the two-user model keeps for the WebUI user; a file the
+    daemon can read but the group cannot must still be healed.
+    """
+    try:
+        for p in get_acme_home().rglob("*"):
+            if p.is_file() and not (p.stat().st_mode & S_IRGRP):
+                return True
+    except OSError:
+        return True
+    return False
+
+
 def _collect_acme() -> schema.AcmeState:
     """Collect ACME certificate list and email.
 
@@ -171,16 +192,18 @@ def _collect_acme() -> schema.AcmeState:
     # `status.error` so the poll diff still detects recovery.
     cert_error: str | None = None
     try:
-        # Self-heal ACME_HOME permissions before listing, exactly like the
-        # handler preflight (_run_acme_preflight). acme.sh dot-sources
-        # account.conf on startup; a prior run by another user (e.g. a manual
-        # run as the WebUI user) can leave it owner-only and make `--list`
-        # exit 2. The startup normalize only covers the first collection, so
-        # the poll must normalize too or a mid-lifetime ownership flip would
-        # blank the cert list until the next issue/renew or daemon restart.
+        # Self-heal ACME_HOME permissions before listing, but only when the
+        # probe detects a lost group-read bit — the steady-state poll then
+        # makes no sudo call. acme.sh dot-sources account.conf on startup; a
+        # prior run by another user (e.g. a manual run as the WebUI user) can
+        # leave it owner-only and make `--list` exit 2. The startup normalize
+        # only covers the first collection, so the poll must probe too or a
+        # mid-lifetime ownership flip would blank the cert list until the
+        # next issue/renew or daemon restart.
         from daemon.handlers.acme import normalize_acme_home
         from lib.acme import list_certs
 
+        if _acme_home_needs_normalize():
             normalize_acme_home()
         certs = list_certs()
     except Exception as exc:

lib/acme.py

@@ -32,6 +32,11 @@ _ACME_ENVIRON = {
 _WEBROOT = PROJECT_DIR / "data" / "acme" / "www"
 
 
+def get_acme_home() -> Path:
+    """Resolve the ACME home directory (``ACME_HOME`` env, default ``data/acme``)."""
+    return Path(os.environ.get("ACME_HOME", str(_ACME_HOME)))
+
+
 def _find_acme() -> str:
     """Locate the acme.sh binary on the system.
 
@@ -87,7 +92,7 @@ def _run_acme(args: list[str]) -> str:
     acme_bin = _find_acme()
 
     # Check for ACME_HOME env var (set by systemd in production)
-    acme_home_env = os.environ.get("ACME_HOME", str(_ACME_HOME))
+    acme_home_env = str(get_acme_home())
 
     cmd: list[str] = [
         acme_bin,
@@ -143,14 +148,22 @@ def _summarize_acme_output(output: str) -> str:
     in the final lines (e.g. "The retryafter=86400 value is too large
     (> 600), will not retry anymore.").  Strips per-line timestamps and
     the "Please check log file" pointer so the summary stays toast-
-    sized.  The full transcript remains in the log and acme.sh.log.
+    sized.  A "Permission denied" diagnostic is preserved even when it
+    is not among the final lines — the actionable-error matcher in
+    daemon/collectors/acme.py keys off it.  The full transcript remains
+    in the log and acme.sh.log.
     """
     lines = [line.strip() for line in output.strip().splitlines() if line.strip()]
     lines = [re.sub(r"^\[[^\]]*\] ", "", line) for line in lines]
     lines = [line for line in lines if not line.startswith("Please check log file")]
     if not lines:
         return "(no output)"
-    return "; ".join(lines[-2:])
+    tail = list(lines[-2:])
+    for line in reversed(lines):
+        if "Permission denied" in line and line not in tail:
+            tail.insert(0, line)
+            break
+    return "; ".join(tail)
 
 
 def set_email(email: str) -> None:
@@ -649,6 +662,7 @@ __all__ = [
     "days_until_expiry",
     "deploy",
     "find_cert_dir",
+    "get_acme_home",
     "get_cert_info",
     "get_cert_paths",
     "get_email",

scripts/install.sh

@@ -253,9 +253,9 @@ mkdir -p /etc/dnsmasq
 chmod -R a+rX "${PROJECT_DIR}/webui/static"
 # ...and traversal (x only) up the parent chain, so repo-in-$HOME installs work.
 _d="${PROJECT_DIR}"
-while [[ "$d" != "/" && -n "$d" ]]; do
-    chmod a+x "$d" 2>/dev/null || true
-    d="$(dirname "$d")"
+while [[ "$_d" != "/" && -n "$_d" ]]; do
+    chmod a+x "$_d" 2>/dev/null || true
+    _d="$(dirname "$_d")"
 done
 # Set ownership: daemon owns project dir in prod, repo owner keeps ownership in dev.
 # The top-level .git (directory or worktree pointer file) is left untouched so

system/nginx/server_block.conf

@@ -53,7 +53,7 @@ server {
 {% endif %}
 
 {% for ppath, pcfg in paths.items() %}
-{% if pcfg.is_management and ppath == '/' %}
+{% if pcfg.is_management %}
     # SPA static assets — served from disk, no Flask round-trip.
     # no-cache: browsers revalidate every load; unchanged files are 304s.
     location /static/ {

tests/test_acme.py

@@ -277,3 +277,35 @@ class TestHasAutoRenew:
         with patch.object(acme, "_ACME_HOME", acme_dir):
             result = acme._has_auto_renew("nonexistent.com")
             assert result is False
+
+
+class TestSummarizeAcmeOutput:
+    def test_last_two_lines(self):
+        out = (
+            "[2026-09-04] line one\n[2026-09-04] retry failed\n[2026-09-04] giving up\n"
+        )
+        assert acme._summarize_acme_output(out) == "retry failed; giving up"
+
+    def test_strips_timestamps_and_log_pointer(self):
+        out = "[ts] work\nPlease check log file /x/acme.sh.log\n[ts] done\n"
+        assert acme._summarize_acme_output(out) == "work; done"
+
+    def test_empty_returns_placeholder(self):
+        assert acme._summarize_acme_output("") == "(no output)"
+
+    def test_preserves_permission_denied_outside_tail(self):
+        out = (
+            "[ts] starting\n"
+            "[ts] /data/acme/account.conf: Permission denied\n"
+            "[ts] step three\n"
+            "[ts] step four\n"
+        )
+        summary = acme._summarize_acme_output(out)
+        # The permission line is not among the final two, but the
+        # actionable-error matcher (daemon/collectors/acme.py) keys off it.
+        assert "account.conf: Permission denied" in summary
+        assert summary.count("; ") == 2  # capped at three lines
+
+    def test_permission_denied_in_tail_not_duplicated(self):
+        out = "[ts] ok\n[ts] account.conf: Permission denied\n"
+        assert acme._summarize_acme_output(out) == "ok; account.conf: Permission denied"

tests/test_nginx.py

@@ -349,6 +349,26 @@ class TestGenerateServerConf:
         out = nginx.generate_server_conf(cfg)
         assert "location /static/" not in out
 
+    def test_management_static_location_on_subpath(self, temp_data_dir):
+        # The SPA references /static/... at the domain root regardless of the
+        # management backend path, so the block is emitted for any
+        # is_management path, not only '/'.
+        cfg = {
+            "domain": "mgmt.example.com",
+            "paths": {
+                "/app": {
+                    "backend": {"host": "127.0.0.1", "port": 9090, "proto": "http"},
+                    "is_management": True,
+                },
+            },
+            "force_ssl": True,
+            "cert": "acme",
+        }
+        out = nginx.generate_server_conf(cfg)
+        assert "location /static/ {" in out
+        static_root = str(nginx.PROJECT_DIR / "webui" / "static")
+        assert f"alias {static_root}/;" in out
+
     def test_websocket_path(self, temp_data_dir):
         cfg = {
             "domain": "mgmt.example.com",

tests/test_state.py

@@ -1,6 +1,7 @@
 """Tests for lib/state.py — state store and collect functions."""
 
 import json
+import os
 from unittest.mock import patch
 
 import daemon.collectors.acme
@@ -267,6 +268,9 @@ class TestAcmeCollectNonFatal:
             patch.object(
                 daemon.collectors.acme, "_get_acme_email", return_value="a@b.c"
             ),
+            patch(
+                "daemon.collectors.acme._acme_home_needs_normalize", return_value=True
+            ),
             patch("daemon.handlers.acme.normalize_acme_home"),
             patch(
                 "lib.acme.list_certs",
@@ -290,6 +294,9 @@ class TestAcmeCollectNonFatal:
             patch.object(
                 daemon.collectors.acme, "_get_acme_email", return_value="a@b.c"
             ),
+            patch(
+                "daemon.collectors.acme._acme_home_needs_normalize", return_value=True
+            ),
             patch("daemon.handlers.acme.normalize_acme_home"),
             patch("lib.acme.list_certs", return_value=[]),
             patch.object(
@@ -316,6 +323,9 @@ class TestAcmeCollectNonFatal:
             patch.object(
                 daemon.collectors.acme, "_get_acme_email", return_value="a@b.c"
             ),
+            patch(
+                "daemon.collectors.acme._acme_home_needs_normalize", return_value=True
+            ),
             patch("daemon.handlers.acme.normalize_acme_home", side_effect=_norm),
             patch("lib.acme.list_certs", side_effect=_list),
             patch.object(
@@ -324,12 +334,78 @@ class TestAcmeCollectNonFatal:
         ):
             result = _collect_acme()
 
-        # The poll must normalize ACME_HOME perms before listing, so a
-        # mid-lifetime ownership flip self-heals without a restart.
+        # The poll must normalize ACME_HOME perms before listing when the
+        # probe detects a lost group-read bit, so a mid-lifetime ownership
+        # flip self-heals without a restart.
         assert order == ["normalize", "list"]
         assert result["certs"] == [{"domain": "example.com"}]
         assert result["status"] == {"error": None}
 
+    def test_no_normalize_when_probe_clean(self):
+        from daemon.collectors.acme import _collect_acme
+
+        order: list[str] = []
+
+        def _norm():
+            order.append("normalize")
+
+        def _list():
+            order.append("list")
+            return []
+
+        with (
+            patch.object(
+                daemon.collectors.acme, "_get_acme_email", return_value="a@b.c"
+            ),
+            patch(
+                "daemon.collectors.acme._acme_home_needs_normalize", return_value=False
+            ),
+            patch("daemon.handlers.acme.normalize_acme_home", side_effect=_norm),
+            patch("lib.acme.list_certs", side_effect=_list),
+            patch.object(
+                daemon.collectors.acme, "_parse_account_conf", return_value=_ACCOUNT
+            ),
+        ):
+            result = _collect_acme()
+
+        # Steady state: the probe sees group-read bits intact, so the poll
+        # must not pay for a sudo normalize.
+        assert order == ["list"]
+        assert result["certs"] == []
+        assert result["status"] == {"error": None}
+
+
+class TestAcmeHomeProbe:
+    """_acme_home_needs_normalize probes the group-read bit without sudo."""
+
+    def test_flags_file_without_group_read(self, tmp_path, monkeypatch):
+        from daemon.collectors.acme import _acme_home_needs_normalize
+
+        monkeypatch.setenv("ACME_HOME", str(tmp_path))
+        (tmp_path / "account.conf").write_text("x")
+        os.chmod(tmp_path / "account.conf", 0o600)
+        assert _acme_home_needs_normalize() is True
+
+    def test_clean_when_group_read_set(self, tmp_path, monkeypatch):
+        from daemon.collectors.acme import _acme_home_needs_normalize
+
+        monkeypatch.setenv("ACME_HOME", str(tmp_path))
+        (tmp_path / "account.conf").write_text("x")
+        os.chmod(tmp_path / "account.conf", 0o640)
+        assert _acme_home_needs_normalize() is False
+
+    def test_clean_on_empty_home(self, tmp_path, monkeypatch):
+        from daemon.collectors.acme import _acme_home_needs_normalize
+
+        monkeypatch.setenv("ACME_HOME", str(tmp_path))
+        assert _acme_home_needs_normalize() is False
+
+    def test_clean_on_missing_home(self, tmp_path, monkeypatch):
+        from daemon.collectors.acme import _acme_home_needs_normalize
+
+        monkeypatch.setenv("ACME_HOME", str(tmp_path / "does-not-exist"))
+        assert _acme_home_needs_normalize() is False
+
     def test_permission_error_is_actionable(self):
         from daemon.collectors.acme import _collect_acme