test: Self-Coding Dashboard Tests

Add tests for dashboard routes:

- Page routes (main page, journal partial, stats partial, execute form)
- API routes (journal list/detail, stats, codebase summary/reindex)
- Execute endpoints (API and HTMX)
- Navigation integration (link in header)

Tests verify endpoints return correct status codes and content types.

tests/test_self_coding_dashboard.py

@@ -0,0 +1,143 @@
+"""Tests for Self-Coding Dashboard Routes.
+
+Tests API endpoints and HTMX views.
+"""
+
+from __future__ import annotations
+
+import pytest
+from fastapi.testclient import TestClient
+
+
+@pytest.fixture
+def client():
+    """Create test client."""
+    from dashboard.app import app
+    return TestClient(app)
+
+
+class TestSelfCodingPageRoutes:
+    """Page route tests."""
+    
+    def test_main_page_loads(self, client):
+        """Main self-coding page should load."""
+        response = client.get("/self-coding")
+        assert response.status_code == 200
+        assert "Self-Coding" in response.text
+    
+    def test_journal_partial(self, client):
+        """Journal partial should return HTML."""
+        response = client.get("/self-coding/journal")
+        assert response.status_code == 200
+        # Should contain journal list or empty message
+        assert "journal" in response.text.lower() or "no entries" in response.text.lower()
+    
+    def test_stats_partial(self, client):
+        """Stats partial should return HTML."""
+        response = client.get("/self-coding/stats")
+        assert response.status_code == 200
+        # Should contain stats cards
+        assert "Total Attempts" in response.text or "success rate" in response.text.lower()
+    
+    def test_execute_form_partial(self, client):
+        """Execute form partial should return HTML."""
+        response = client.get("/self-coding/execute-form")
+        assert response.status_code == 200
+        assert "Task Description" in response.text
+        assert "textarea" in response.text
+
+
+class TestSelfCodingAPIRoutes:
+    """API route tests."""
+    
+    def test_api_journal_list(self, client):
+        """API should return journal entries."""
+        response = client.get("/self-coding/api/journal")
+        assert response.status_code == 200
+        
+        data = response.json()
+        assert isinstance(data, list)
+    
+    def test_api_journal_list_with_limit(self, client):
+        """API should respect limit parameter."""
+        response = client.get("/self-coding/api/journal?limit=5")
+        assert response.status_code == 200
+        
+        data = response.json()
+        assert isinstance(data, list)
+        assert len(data) <= 5
+    
+    def test_api_journal_detail_not_found(self, client):
+        """API should return 404 for non-existent entry."""
+        response = client.get("/self-coding/api/journal/99999")
+        assert response.status_code == 404
+    
+    def test_api_stats(self, client):
+        """API should return stats."""
+        response = client.get("/self-coding/api/stats")
+        assert response.status_code == 200
+        
+        data = response.json()
+        assert "total_attempts" in data
+        assert "success_rate" in data
+        assert "recent_failures" in data
+    
+    def test_api_codebase_summary(self, client):
+        """API should return codebase summary."""
+        response = client.get("/self-coding/api/codebase/summary")
+        assert response.status_code == 200
+        
+        data = response.json()
+        assert "summary" in data
+    
+    def test_api_codebase_reindex(self, client):
+        """API should trigger reindex."""
+        response = client.post("/self-coding/api/codebase/reindex")
+        assert response.status_code == 200
+        
+        data = response.json()
+        assert "indexed" in data
+        assert "failed" in data
+        assert "skipped" in data
+
+
+class TestSelfCodingExecuteEndpoint:
+    """Execute endpoint tests."""
+    
+    def test_execute_api_endpoint(self, client):
+        """Execute API endpoint should accept task."""
+        # Note: This will actually try to execute, which may fail
+        # In production, this should be mocked or require auth
+        response = client.post(
+            "/self-coding/api/execute",
+            json={"task_description": "Test task that will fail preflight"}
+        )
+        
+        # Should return response (success or failure)
+        assert response.status_code == 200
+        
+        data = response.json()
+        assert "success" in data
+        assert "message" in data
+    
+    def test_execute_htmx_endpoint(self, client):
+        """Execute HTMX endpoint should accept form data."""
+        response = client.post(
+            "/self-coding/execute",
+            data={"task_description": "Test task that will fail preflight"}
+        )
+        
+        # Should return HTML response
+        assert response.status_code == 200
+        assert "text/html" in response.headers["content-type"]
+
+
+class TestSelfCodingNavigation:
+    """Navigation integration tests."""
+    
+    def test_nav_link_in_header(self, client):
+        """Self-coding link should be in header."""
+        response = client.get("/")
+        assert response.status_code == 200
+        assert "/self-coding" in response.text
+        assert "SELF-CODING" in response.text