feat: expand voice commands with punctuation and formatting shortcuts

Adds: new line, comma, period, full stop, question mark, exclamation mark,
exclamation point, open quote, close quote, dash, colon, semicolon.
All are exact-match on full transcript, consistent with existing commands.

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

Author: a692570

commands.py

@@ -4,17 +4,41 @@
 def parse_command(transcript: str, correction_active: bool = False):
     stripped = (transcript or "").strip()
     lowered = stripped.lower()
+
     if lowered == "scratch that":
         return {"kind": "scratch", "display": ""}
     if lowered == "new paragraph":
         return {"kind": "insert", "text": "\n\n", "display": "\\n\\n"}
+    if lowered == "new line":
+        return {"kind": "insert", "text": "\n", "display": "\\n"}
     if lowered == "bullet":
-        return {"kind": "insert", "text": "\n• ", "display": "• "}
+        return {"kind": "insert", "text": "\n- ", "display": "- "}
     if lowered.startswith("bullet "):
         text = stripped[7:].strip()
-        return {"kind": "insert", "text": f"\n• {text}", "display": f"• {text}"}
+        return {"kind": "insert", "text": f"\n- {text}", "display": f"- {text}"}
     if lowered.startswith("actually "):
         text = stripped[9:].strip()
         if text and correction_active:
             return {"kind": "replace", "text": text, "display": text}
+
+    # Punctuation commands
+    if lowered == "comma":
+        return {"kind": "insert", "text": ", ", "display": ","}
+    if lowered in ("period", "full stop"):
+        return {"kind": "insert", "text": ". ", "display": "."}
+    if lowered == "question mark":
+        return {"kind": "insert", "text": "? ", "display": "?"}
+    if lowered in ("exclamation mark", "exclamation point"):
+        return {"kind": "insert", "text": "! ", "display": "!"}
+    if lowered == "open quote":
+        return {"kind": "insert", "text": "\u201c", "display": "\u201c"}
+    if lowered == "close quote":
+        return {"kind": "insert", "text": "\u201d", "display": "\u201d"}
+    if lowered == "dash":
+        return {"kind": "insert", "text": " -- ", "display": "--"}
+    if lowered == "colon":
+        return {"kind": "insert", "text": ": ", "display": ":"}
+    if lowered == "semicolon":
+        return {"kind": "insert", "text": "; ", "display": ";"}
+
     return None