fix(podcasts): code-review pass over the session's UI surfaces

Findings from the systematic gotcha-class review before the browser
pass:

- The collection smart editor's Apply derived the collection NAME from
  document.title — which parses to "Smart Collection", RENAMING the
  collection on every apply. The server now renders the real name
  (data-collection-name) and the write path refuses to proceed without
  it.
- TestRenderingPartialsRender pinned the pre-episode-collections
  empty-state copy ("No books in this collection yet.") — updated to
  the shipped label ("Nothing in this collection yet."; collections
  hold episodes now).
- The deleted handler-local rule comparators (evaluateRule/
  compareValues — removed in item 3.4's single-evaluator refactor)
  left behind two unit-test files testing the duplicates; deleted.
  Their semantics remain covered at the service level
  (TestEvaluateRules_* over FieldMatches/EvaluateRules) and
  TestTextToString (which actually pins utils.PgTextString) stays.

Everything else reviewed clean against the gotcha classes: templ
whole-expression attrs, ?={ boolean attrs, JSONArg quoting in
x-init/data attrs, Alpine CSP store paths, htmx form-encoding, the
" assert escaping, and the aria-label selector contract on the
player's reload listener.

internal/handlers/collections_test.go

@@ -3,95 +3,12 @@ package handlers
 import (
 	"testing"
 
-	"bookhoard/internal/database"
 	"bookhoard/internal/utils"
 
 	"github.com/jackc/pgx/v5/pgtype"
 	"github.com/stretchr/testify/assert"
 )
 
-func TestCompareValues_Equals(t *testing.T) {
-	handler := &CollectionHandler{}
-
-	result := handler.compareValues("Science Fiction", "equals", "Science Fiction")
-	assert.True(t, result)
-
-	result = handler.compareValues("Science Fiction", "equals", "Fantasy")
-	assert.False(t, result)
-}
-
-func TestCompareValues_Contains(t *testing.T) {
-	handler := &CollectionHandler{}
-
-	result := handler.compareValues("Isaac Asimov", "contains", "asimov")
-	assert.True(t, result)
-
-	result = handler.compareValues("Isaac Asimov", "contains", "clarke")
-	assert.False(t, result)
-}
-
-func TestCompareValues_GreaterThan(t *testing.T) {
-	handler := &CollectionHandler{}
-
-	result := handler.compareValues("2021", "greater_than", "2000")
-	assert.True(t, result)
-
-	result = handler.compareValues("1999", "greater_than", "2000")
-	assert.False(t, result)
-}
-
-func TestCompareValues_NotEquals(t *testing.T) {
-	handler := &CollectionHandler{}
-
-	result := handler.compareValues("Science Fiction", "not_equals", "Fantasy")
-	assert.True(t, result)
-
-	result = handler.compareValues("Science Fiction", "not_equals", "Science Fiction")
-	assert.False(t, result)
-}
-
-func TestEvaluateRule_Genre(t *testing.T) {
-	item := database.MediaItems{
-		Genre: pgtype.Text{String: "Science Fiction", Valid: true},
-	}
-
-	handler := &CollectionHandler{}
-
-	result := handler.evaluateRule(item, "genre", "equals", "Science Fiction")
-	assert.True(t, result)
-
-	result = handler.evaluateRule(item, "genre", "equals", "Fantasy")
-	assert.False(t, result)
-}
-
-func TestEvaluateRule_Author(t *testing.T) {
-	item := database.MediaItems{
-		Author: pgtype.Text{String: "Isaac Asimov", Valid: true},
-	}
-
-	handler := &CollectionHandler{}
-
-	result := handler.evaluateRule(item, "author", "contains", "asimov")
-	assert.True(t, result)
-
-	result = handler.evaluateRule(item, "author", "contains", "clarke")
-	assert.False(t, result)
-}
-
-func TestEvaluateRule_CopyrightYear(t *testing.T) {
-	item := database.MediaItems{
-		CopyrightYear: pgtype.Int4{Int32: 2021, Valid: true},
-	}
-
-	handler := &CollectionHandler{}
-
-	result := handler.evaluateRule(item, "copyright_year", "greater_than", "2000")
-	assert.True(t, result)
-
-	result = handler.evaluateRule(item, "copyright_year", "less_than", "2000")
-	assert.False(t, result)
-}
-
 func TestTextToString(t *testing.T) {
 	tests := []struct {
 		name     string