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+# Bug Report: Template Rendering Error in Notes Tab
+
+## Description
+The application logs an error when rendering the Notes tab:
+`Error rendering notes tab: template: error-banner.html:2:5: executing "error-banner" at <.Errors>: can't evaluate field Errors in type struct { Notes []models.Note }`
+
+This occurs because the `notes-tab` template (which includes `error-banner`) expects a data structure with an `Errors` field, but `HandleNotes` in `internal/handlers/tabs.go` passes an anonymous struct with only `Notes`.
+
+## Reproduction
+1. Run the application.
+2. Navigate to the Notes tab (or trigger a request to `/tabs/notes`).
+3. Observe the error in the server logs.
+
+## Fix Instructions
+
+### 1. Create a Reproduction Test
+Create a new test file `internal/handlers/tabs_test.go` to reproduce the issue.
+
+```go
+package handlers
+
+import (
+	"html/template"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"task-dashboard/internal/models"
+	"task-dashboard/internal/store"
+)
+
+func TestHandleNotes_RenderError(t *testing.T) {
+	// Setup
+	// Note: You might need to mock the store or use a temporary SQLite DB
+	// For this specific template error, we can test the template execution directly
+	// or mock the store to return empty notes.
+	
+	// Since setting up the full store with DB is complex for a unit test,
+	// let's focus on the data structure passed to the template.
+    // However, the handler is coupled to the store.
+    
+    // A better approach for this specific bug is to verify the fix by ensuring
+    // the data struct has the Errors field.
+}
+```
+
+**Better Approach:**
+Modify `internal/handlers/tabs.go` to use a consistent data structure that includes `Errors`.
+
+### 2. Modify `internal/handlers/tabs.go`
+
+Update the `HandleNotes` function (and others if necessary) to pass a struct that includes `Errors`.
+
+```go
+// Define a shared data structure or use an anonymous one with Errors
+data := struct {
+    Notes  []models.Note
+    Errors []string
+}{
+    Notes:  notes,
+    Errors: nil, // Or populate if there are errors
+}
+```
+
+### 3. Verify
+Run the application and check the logs. The error should disappear.
+
+## Automated Test for Verification
+Since we don't have a full test suite set up yet, we can create a simple test that parses the templates and attempts to execute them with the corrected data structure to ensure compatibility.
+
+Create `internal/handlers/template_test.go`:
+
+```go
+package handlers_test
+
+import (
+	"html/template"
+	"testing"
+	"task-dashboard/internal/models"
+)
+
+func TestNotesTemplateRendering(t *testing.T) {
+	// Parse templates
+	tmpl, err := template.ParseGlob("../../web/templates/*.html")
+	if err != nil {
+		t.Fatalf("Failed to parse templates: %v", err)
+	}
+	tmpl, err = tmpl.ParseGlob("../../web/templates/partials/*.html")
+	if err != nil {
+		t.Fatalf("Failed to parse partials: %v", err)
+	}
+
+	// Define the data structure we EXPECT to use
+	data := struct {
+		Notes  []models.Note
+		Errors []string
+	}{
+		Notes:  []models.Note{},
+		Errors: []string{},
+	}
+
+	// Execute
+	err = tmpl.ExecuteTemplate(io.Discard, "notes-tab", data)
+	if err != nil {
+		t.Errorf("Failed to render notes-tab with corrected data: %v", err)
+	}
+}
+```
+(Note: You'll need to import `io` and adjust paths).