Rescue PR #23 into existing crisis package (#24)

crisis/detect.py:
- Add 'better off without me' CRITICAL pattern
- Add 'desperate' HIGH pattern
- Add extract_context() for match snippets

crisis/response.py:
- Add 5-4-3-2-1 grounding exercise
- Add breathing exercise
- Add generate_grounding_steps() and generate_breathing_exercise()

crisis/test_rescue.py: 5 tests for new features

crisis/detect.py

@@ -21,6 +21,7 @@ class CrisisDetectionResult:
 # ── Indicator sets ──────────────────────────────────────────────
 
 CRITICAL_INDICATORS = [
+    r"\bbetter off without me\b",
     r"\bkill\s*(my)?self\b",
     r"\bend\s*my\s*life\b",
     r"\bsuicid(?:al|ed|e)\b",
@@ -41,6 +42,7 @@ CRITICAL_INDICATORS = [
 ]
 
 HIGH_INDICATORS = [
+    r"\bdesperate\b",
     r"\bdespair\b",
     r"\bhopeless\b",
     r"\bno(?!t)\s+(one|body|point|hope|future|way\s+out)\b",

crisis/test_rescue.py

@@ -0,0 +1,29 @@
+"""Tests for rescued crisis detection improvements."""
+from crisis.detect import scan, extract_context
+from crisis.response import generate_grounding_steps, generate_breathing_exercise
+
+def test_better_off_without_me():
+    result = scan("Everyone would be better off without me")
+    assert result.level == "CRITICAL"
+
+def test_desperate():
+    result = scan("I feel desperate and alone")
+    assert result.level in ("HIGH", "CRITICAL")
+
+def test_context_extraction():
+    text = "I feel hopeless about everything"
+    result = scan(text)
+    assert len(result.matches) > 0
+    for m in result.matches:
+        ctx = extract_context(text, m["start"], m["end"])
+        assert len(ctx) > 0
+
+def test_grounding_steps():
+    steps = generate_grounding_steps()
+    assert len(steps) == 5
+    assert "see" in steps[0].lower()
+
+def test_breathing_exercise():
+    exercise = generate_breathing_exercise()
+    assert "4" in exercise
+    assert "6" in exercise