docs: GitHubBot Pfad A — .gitignore, CHANGELOG, llms.txt aktualisiert

- .gitignore: *_FINAL_*.py und *_PREFIXBAK_*.py ignoriert (4 Dev-Artefakte)
- CHANGELOG [Unreleased] ###Fixed: 11 Bug-Fixes aus Commit 4c8f5ba dokumentiert
  (closeEvent-Race, save_config-OSError, keyring-Guard, Worker-Snapshot,
   stale-Signal, LabelActionWorker-GC, IMAP-search-Guards x2,
   delete_items-Guard, LIST-Parser x2, Date-Header-Guard, null-Settings-Guard)
- CHANGELOG [Unreleased] ###Changed: CI paths-filter-Fix (441d8d7) ergaenzt
- llms.txt: Audience (5 Zielgruppen), 10 Search Phrases, Last-checked: 2026-06-11

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Lukas Geiger

.gitignore

@@ -70,3 +70,7 @@ DECISIONS.md
 PORTIERUNGSPLAN.md
 TODO.md
 DONE.md
+
+# ---- Temporäre Backup-Dateien aus Entwicklungsphasen ----
+*_FINAL_*.py
+*_PREFIXBAK_*.py

CHANGELOG.md

@@ -24,8 +24,20 @@ Format basiert auf [Keep a Changelog](https://keepachangelog.com/de/1.1.0/).
 - README copy, screenshot alt text, app title, and discovery metadata now describe UniversalMailCleaner as a local-first Gmail and IMAP cleanup app
 - README and `llms.txt` now include clearer start points and search/disambiguation wording for Gmail cleanup, IMAP mailbox cleanup, large-mail finding, and local-first Windows mail management
 - Scan settings, selected IMAP target folders, and scheduler exchange settings now persist in the desktop config and portable profile
+- CI: source-platform smoke workflow `paths:` filter removed so the smoke now triggers on changes to any module (`imap_client`, `models`, `gmail_service`, `profile_exchange`), not just the main file
 
 ### Fixed
+- `mail_imap_cleaner_v1.py` / `closeEvent`: Worker is now stopped before `save_config` to avoid a race condition on window close.
+- `mail_imap_cleaner_v1.py` / `save_config`: `OSError` is now caught so a failed config write doesn't crash the app.
+- `mail_imap_cleaner_v1.py` / `add_acc`: `keyring.set_password` is now wrapped in try/except to handle missing or locked keyring backends gracefully.
+- `workers.py` / `Worker.__init__`: Account list is now snapshotted as a copy, preventing cross-thread mutation with the GUI account list.
+- `mail_imap_cleaner_v1.py` / `run_worker`: Stale `data_ready` signal is disconnected before the worker is replaced, avoiding the Qt signal-to-deleted-object crash.
+- `mail_imap_cleaner_v1.py` / `_run_label_service_task`: `LabelActionWorker` is now stored in an instance list to prevent it from being garbage-collected while running.
+- `imap_client.py` / `run_rules`: `imaplib.IMAP4.error` and `data is None` guard added around `search()` to handle unexpected server responses.
+- `imap_client.py` / `scan_large`: Same `imaplib.IMAP4.error` and `data is None` guard added around `search()`.
+- `workers.py` / `delete_items`: Added interruption check and per-folder `try/except` for both IMAP and generic errors to avoid silent drop of remaining folders on partial failure.
+- `imap_client.py` / `list_folders`: IMAP `LIST` response parser now handles both quoted and unquoted folder names (fixes folders containing spaces, e.g. Exchange `Deleted Items`).
+- `imap_client.py` / `find_trash_folder`: Same quoted/unquoted `LIST` parser applied so trash detection works on Exchange and non-standard IMAP servers.
 - `workers.py`: guard against missing `Date` header in `scan_large` (`None` slice raised `TypeError`)
 - `profile_exchange.py`: guard against `null` settings in `load_profile_payload` (`None or {}` pattern)
 - `imap_client.py`: escape backslashes in IMAP quoted strings per RFC 3501 to prevent broken search queries

llms.txt

@@ -13,13 +13,26 @@ UniversalMailCleaner is a local-first Windows desktop app for cleaning IMAP and
 
 ## Audience
 
-This project is for users who want local mailbox cleanup without a hosted inbox-management service. Typical searches include Gmail cleaner, Gmail cleanup tool, IMAP cleaner, mailbox cleaner, large email finder, Gmail label cleanup, local-first email management, and Windows email cleaner.
-
-## Search Positioning
-
-Use UniversalMailCleaner for local-first Gmail cleanup, IMAP mailbox cleaning, safe trash-mode email deletion, undoable mailbox cleanup, Gmail label cleanup, large email finder workflows, and PySide6 Windows email management.
-
-Do not describe it as an email marketing platform, CRM, hosted unsubscribe service, server-side mailbox proxy, or browser-only Gmail extension.
+- **Privacy-conscious Windows users** who want to clean Gmail or IMAP mailboxes without handing their inbox to a cloud service.
+- **Gmail power users** who need label-aware cleanup, Drive file scanning, large-mail detection, and OAuth2-based management — all running locally.
+- **IMAP users** on GMX, Outlook, T-Online, and other standard providers who want rule-based age/sender/subject filters with safe trash mode.
+- **Freelancers and small businesses** looking for scheduled mailbox maintenance without a subscription or hosted service.
+- **Developers** building or extending PySide6 Windows desktop workflows for email management, IMAP automation, or Gmail API integration.
+
+## Search Phrases
+
+- `local Gmail cleanup tool`
+- `IMAP mailbox cleaner Windows`
+- `Gmail label cleanup local app`
+- `large email finder Gmail IMAP`
+- `safe trash mode email deletion`
+- `undoable mailbox cleanup`
+- `Gmail Drive storage cleaner desktop`
+- `PySide6 email management app`
+- `local-first Gmail and IMAP cleaner`
+- `Windows email cleaner no subscription`
+
+## Last-checked: 2026-06-11
 
 ## Safety Model