chore: sweep dead code across all three services

Per review §1 — verified no callers before each deletion:

- _next_scrape_utc (context dict key never read by any template)
- ALERT_SCRAPE_INTERVAL_SECONDS settings import (only _next_scrape_utc read it)
- alert/paths.py (imported by nothing)
- alert/settings.py LANGUAGE (alert doesn't use translations.toml)
- alert/main.py: the vestigial `c = {}` connectivity dict, the comment
  about re-enabling it, and the entire connectivity block in
  _flat_payload — the web-side columns stay NULL on insert now
- alert/maps.py: DESTINATIONS, calculate_score, _get_next_weekday,
  _calculate_transfers (only geocode is used in the scraper)
- alert/flat.py: connectivity + display_address properties,
  _connectivity field, unused datetime import
- apply/utils.py str_to_preview (no callers) — file removed
- web/matching.py: max_morning_commute + commute check
- web/app.py: don't pass connectivity dict into flat_matches_filter,
  don't write email_address through update_notifications
- web/db.py: get_error (no callers); drop kill_switch,
  max_morning_commute, email_address from their allowed-sets so they're
  not writable through update_* anymore
- web/settings.py + docker-compose.yml: SMTP_HOST/PORT/USERNAME/PASSWORD/
  FROM/STARTTLS (notifications.py is telegram-only now)

DB columns themselves (kill_switch, email_address, max_morning_commute,
connectivity_morning_time, connectivity_night_time) stay in the schema
— SQLite can't drop them cheaply and they're harmless.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

web/app.py

@@ -53,7 +53,6 @@ from auth import (
 )
 from matching import flat_matches_filter, row_to_dict
 from settings import (
-    ALERT_SCRAPE_INTERVAL_SECONDS,
     APPLY_FAILURE_THRESHOLD,
     INTERNAL_API_KEY,
     PUBLIC_URL,
@@ -200,16 +199,6 @@ def _auto_apply_allowed(prefs) -> bool:
     return apply_client.health()
 
 
-def _next_scrape_utc() -> str:
-    hb = db.get_state("last_alert_heartbeat")
-    dt = _parse_iso(hb)
-    if dt is None:
-        return ""
-    if dt.tzinfo is None:
-        dt = dt.replace(tzinfo=timezone.utc)
-    return (dt + timedelta(seconds=ALERT_SCRAPE_INTERVAL_SECONDS)).astimezone(timezone.utc).isoformat(timespec="seconds")
-
-
 def _last_scrape_utc() -> str:
     hb = db.get_state("last_alert_heartbeat")
     dt = _parse_iso(hb)
@@ -425,7 +414,7 @@ def _wohnungen_context(user) -> dict:
                 continue
         if not flat_matches_filter({
             "rooms": f["rooms"], "total_rent": f["total_rent"], "size": f["size"],
-            "wbs": f["wbs"], "connectivity": {"morning_time": f["connectivity_morning_time"]},
+            "wbs": f["wbs"],
         }, filters):
             continue
         last = db.last_application_for_flat(uid, f["id"])
@@ -499,7 +488,6 @@ def _wohnungen_context(user) -> dict:
         "apply_allowed": allowed,
         "apply_block_reason": reason,
         "apply_reachable": apply_client.health(),
-        "next_scrape_utc": _next_scrape_utc(),
         "last_scrape_utc": _last_scrape_utc(),
         "has_running_apply": has_running,
         "poll_interval": 3 if has_running else 30,
@@ -1063,7 +1051,6 @@ async def action_notifications(request: Request, user=Depends(require_user)):
         "channel": channel,
         "telegram_bot_token": form.get("telegram_bot_token", ""),
         "telegram_chat_id": form.get("telegram_chat_id", ""),
-        "email_address": "",
         "notify_on_match": _b("notify_on_match"),
         "notify_on_apply_success": _b("notify_on_apply_success"),
         "notify_on_apply_fail": _b("notify_on_apply_fail"),

web/db.py

@@ -435,7 +435,7 @@ def get_filters(user_id: int) -> sqlite3.Row:
 def update_filters(user_id: int, data: dict) -> None:
     _ensure_user_rows(user_id)
     allowed = {"rooms_min", "rooms_max", "max_rent", "min_size",
-               "max_morning_commute", "wbs_required", "max_age_hours"}
+               "wbs_required", "max_age_hours"}
     clean = {k: data.get(k) for k in allowed if k in data}
     if not clean:
         return
@@ -453,7 +453,7 @@ def get_notifications(user_id: int) -> sqlite3.Row:
 def update_notifications(user_id: int, data: dict) -> None:
     _ensure_user_rows(user_id)
     allowed = {
-        "channel", "telegram_bot_token", "telegram_chat_id", "email_address",
+        "channel", "telegram_bot_token", "telegram_chat_id",
         "notify_on_match", "notify_on_apply_success", "notify_on_apply_fail",
     }
     clean = {k: v for k, v in data.items() if k in allowed}
@@ -473,7 +473,7 @@ def get_preferences(user_id: int) -> sqlite3.Row:
 def update_preferences(user_id: int, data: dict) -> None:
     _ensure_user_rows(user_id)
     allowed = {
-        "auto_apply_enabled", "submit_forms", "kill_switch",
+        "auto_apply_enabled", "submit_forms",
         "apply_circuit_open", "apply_recent_failures",
     }
     clean = {k: v for k, v in data.items() if k in allowed}
@@ -719,10 +719,6 @@ def recent_errors(user_id: Optional[int], limit: int = 100,
     ).fetchall())
 
 
-def get_error(error_id: int) -> Optional[sqlite3.Row]:
-    return _get_conn().execute("SELECT * FROM errors WHERE id = ?", (error_id,)).fetchone()
-
-
 # ---------------------------------------------------------------------------
 # Audit log
 # ---------------------------------------------------------------------------

web/matching.py

@@ -18,7 +18,6 @@ def flat_matches_filter(flat: dict, f: dict | None) -> bool:
     rooms = flat.get("rooms") or 0.0
     rent = flat.get("total_rent") or 0.0
     size = flat.get("size") or 0.0
-    commute = (flat.get("connectivity") or {}).get("morning_time") or 0.0
     wbs_str = str(flat.get("wbs", "")).strip().lower()
 
     if f.get("rooms_min") is not None and rooms < float(f["rooms_min"]):
@@ -29,8 +28,6 @@ def flat_matches_filter(flat: dict, f: dict | None) -> bool:
         return False
     if f.get("min_size") is not None and size < float(f["min_size"]):
         return False
-    if f.get("max_morning_commute") is not None and commute > float(f["max_morning_commute"]):
-        return False
 
     wbs_req = (f.get("wbs_required") or "").strip().lower()
     if wbs_req == "yes":

web/settings.py

@@ -55,14 +55,6 @@ RETENTION_RUN_INTERVAL_SECONDS: int = int(getenv("RETENTION_RUN_INTERVAL_SECONDS
 LOGIN_RATE_LIMIT: int = int(getenv("LOGIN_RATE_LIMIT", "5"))
 LOGIN_RATE_WINDOW_SECONDS: int = int(getenv("LOGIN_RATE_WINDOW_SECONDS", "900"))
 
-# --- Email (system-wide SMTP for notifications) -------------------------------
-SMTP_HOST: str = getenv("SMTP_HOST", "")
-SMTP_PORT: int = int(getenv("SMTP_PORT", "587"))
-SMTP_USERNAME: str = getenv("SMTP_USERNAME", "")
-SMTP_PASSWORD: str = getenv("SMTP_PASSWORD", "")
-SMTP_FROM: str = getenv("SMTP_FROM", "wohnungsdidi@localhost")
-SMTP_STARTTLS: bool = getenv("SMTP_STARTTLS", "true").lower() in ("true", "1", "yes", "on")
-
 # --- App URL (used to build links in notifications) ---------------------------
 PUBLIC_URL: str = getenv("PUBLIC_URL", "https://flat.lab.moritz.run")