Rename to stealergram, add pyproject.toml, purge em-dashes

- Rename project to stealergram throughout
- Add pyproject.toml (replaces requirements.txt split, folds pytest.ini)
- Replace all em-dashes with hyphens across all source files

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

QUICK_REF.md

@@ -1,4 +1,4 @@
-# ULP Monitor — Quick Reference
+# ULP Monitor - Quick Reference
 
 > For Claude Code: read the per-file `.md` alongside each `.py` before editing.  
 > Full docs in `README.md`.
@@ -10,7 +10,7 @@
 ```
 ulp_monitor/
 ├── main.py           Entry point (--no-tui flag for CLI mode)
-├── config.py         All settings — edit this for keywords, channels, paths
+├── config.py         All settings - edit this for keywords, channels, paths
 │
 ├── core/             Telegram I/O pipeline (all async, Telethon-dependent)
 │   ├── scraper.py        Live listener + backfill orchestration
@@ -24,11 +24,11 @@ ulp_monitor/
 │   ├── cache.py          Seen file-ID dedup (data/cache.json)
 │   └── database.py       SQLite read/write (data/hits.db)
 │
-├── tui/              Textual TUI — runs in main thread
+├── tui/              Textual TUI - runs in main thread
 │   ├── app.py            MonitorApp + all screens + bot thread launcher
 │   └── events.py         Thread-safe queue.Queue event bus
 │
-└── data/             Runtime output — gitignored
+└── data/             Runtime output - gitignored
     ├── hits.db
     ├── hits.txt
     ├── hits.csv
@@ -126,7 +126,7 @@ cross-thread communication
 | MEDIUM | 20 | Client-facing URL (app, booking, helpdesk…) |
 | LOW | 10 | Org domain appears anywhere in line |
 
-`@`-keyword rule: pattern requires literal `@` before domain — `user@gmail.com` on a URL containing `myorg.cl` does **not** trigger CRITICAL.
+`@`-keyword rule: pattern requires literal `@` before domain - `user@gmail.com` on a URL containing `myorg.cl` does **not** trigger CRITICAL.
 
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