refactor: Phase 3 — reorganize tests into module-mirroring subdirectories

Move 97 test files from flat tests/ into 13 subdirectories:
  tests/dashboard/   (8 files — routes, mobile, mission control)
  tests/swarm/       (17 files — coordinator, docker, routing, tasks)
  tests/timmy/       (12 files — agent, backends, CLI, tools)
  tests/self_coding/  (14 files — git safety, indexer, self-modify)
  tests/lightning/   (3 files — L402, LND, interface)
  tests/creative/    (8 files — assembler, director, image/music/video)
  tests/integrations/ (10 files — chat bridge, telegram, voice, websocket)
  tests/mcp/         (4 files — bootstrap, discovery, executor)
  tests/spark/       (3 files — engine, tools, events)
  tests/hands/       (3 files — registry, oracle, phase5)
  tests/scripture/   (1 file)
  tests/infrastructure/ (3 files — router cascade, API)
  tests/security/    (3 files — XSS, regression)

Fix Path(__file__) reference in test_mobile_scenarios.py for new depth.
Add __init__.py to all test subdirectories.

Tests: 1503 passed, 9 failed (pre-existing), 53 errors (pre-existing)

https://claude.ai/code/session_019oMFNvD8uSGSSmBMGkBfQN

tests/security/test_security_fixes_xss.py

@@ -0,0 +1,69 @@
+import pytest
+from fastapi.templating import Jinja2Templates
+
+def test_agent_chat_msg_xss_prevention():
+    """Verify XSS prevention in agent_chat_msg.html."""
+    templates = Jinja2Templates(directory="src/dashboard/templates")
+    payload = "<script>alert('xss')</script>"
+    class MockAgent:
+        def __init__(self):
+            self.name = "TestAgent"
+            self.id = "test-agent"
+    
+    response = templates.get_template("partials/agent_chat_msg.html").render({
+        "message": payload,
+        "response": payload,
+        "error": payload,
+        "agent": MockAgent(),
+        "timestamp": "12:00:00"
+    })
+    
+    # Check that payload is escaped
+    assert "&lt;script&gt;alert(&#39;xss&#39;)&lt;/script&gt;" in response
+    assert payload not in response
+
+def test_agent_panel_xss_prevention():
+    """Verify XSS prevention in agent_panel.html."""
+    templates = Jinja2Templates(directory="src/dashboard/templates")
+    payload = "<script>alert('xss')</script>"
+    class MockAgent:
+        def __init__(self):
+            self.name = payload
+            self.id = "test-agent"
+            self.status = "idle"
+            self.capabilities = payload
+            
+    class MockTask:
+        def __init__(self):
+            self.id = "task-1"
+            self.status = type('obj', (object,), {'value': 'completed'})
+            self.created_at = "2026-02-26T12:00:00"
+            self.description = payload
+            self.result = payload
+
+    response = templates.get_template("partials/agent_panel.html").render({
+        "agent": MockAgent(),
+        "tasks": [MockTask()]
+    })
+    
+    assert "&lt;script&gt;alert(&#39;xss&#39;)&lt;/script&gt;" in response
+    assert payload not in response
+
+def test_swarm_sidebar_xss_prevention():
+    """Verify XSS prevention in swarm_agents_sidebar.html."""
+    templates = Jinja2Templates(directory="src/dashboard/templates")
+    payload = "<script>alert('xss')</script>"
+    class MockAgent:
+        def __init__(self):
+            self.name = payload
+            self.id = "test-agent"
+            self.status = "idle"
+            self.capabilities = payload
+            self.last_seen = "2026-02-26T12:00:00"
+
+    response = templates.get_template("partials/swarm_agents_sidebar.html").render({
+        "agents": [MockAgent()]
+    })
+    
+    assert "&lt;script&gt;alert(&#39;xss&#39;)&lt;/script&gt;" in response
+    assert payload not in response