test(phase-6): channel handle, preview mode, playlist meta

Also tightens stat/post-video rendering so "0" prints as "0" and not
"0.0" (Number::abbreviate(0, precision: 1) stringifies as "0.0", which
leaked into the About tab's Total Views card and post-video badges).

Four tests covering:
- /@username opens the matching channel.
- /@invalid url (space) 404s.
- Owner view shows id="postForm"; preview?preview=1 hides it.
- Zero-view playlist doesn't render "bi-eye … 0.0"; "1 videos" never
  renders in place of "1 video".

Fixed a Blade dupe-declaration fatal that only fired in feature tests
(two requests in one PHP process would redeclare notifVal()). Guarded
with function_exists.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>

resources/views/user/channel.blade.php

@@ -548,7 +548,7 @@ $headerSocialMap = [
                         <div class="ch-post-video-info">
                             <div class="ch-post-video-title">{{ $v->title }}</div>
                             <div class="ch-post-video-meta">
-                                <span class="ch-post-video-badge"><i class="bi bi-eye"></i> {{ \Illuminate\Support\Number::abbreviate($v->view_count, precision: 1) }}</span>
+                                <span class="ch-post-video-badge"><i class="bi bi-eye"></i> {{ $v->view_count > 0 ? \Illuminate\Support\Number::abbreviate($v->view_count, precision: 1) : '0' }}</span>
                                 @if($v->duration)<span class="ch-post-video-badge"><i class="bi bi-clock"></i> {{ $v->formatted_duration }}</span>@endif
                                 @if($v->is_shorts)<span class="ch-post-video-badge" style="color:#e33;"><i class="bi bi-phone"></i> Short</span>@endif
                             </div>
@@ -1091,7 +1091,7 @@ $headerSocialMap = [
                 <div class="ch-about-card-title"><i class="bi bi-bar-chart-fill"></i> Stats</div>
                 <div class="ch-stat-cards">
                     <div class="ch-stat-card">
-                        <div class="ch-stat-card-val">{{ \Illuminate\Support\Number::abbreviate($totalViews, precision: 1) }}</div>
+                        <div class="ch-stat-card-val">{{ $totalViews > 0 ? \Illuminate\Support\Number::abbreviate($totalViews, precision: 1) : '0' }}</div>
                         <div class="ch-stat-card-key">Total Views</div>
                     </div>
                     <div class="ch-stat-card">
@@ -1372,8 +1372,13 @@ if ($oldLinks) {
             @php
                 $notifPrefs = $user->notification_preferences ?? [];
                 $notifDefs  = \App\Models\User::notifDefaults();
-                function notifVal(array $prefs, array $defs, string $key): bool {
-                    return isset($prefs[$key]) ? (bool)$prefs[$key] : ($defs[$key] ?? true);
+                // function_exists guard so a second render in the same PHP
+                // process (feature tests fire two requests in one process)
+                // doesn't fatal with "Cannot redeclare notifVal()".
+                if (!function_exists('notifVal')) {
+                    function notifVal(array $prefs, array $defs, string $key): bool {
+                        return isset($prefs[$key]) ? (bool)$prefs[$key] : ($defs[$key] ?? true);
+                    }
                 }
             @endphp
             <div class="ch-settings-card" id="notifPrefsCard">

tests/Feature/Phase6ChannelTest.php

@@ -0,0 +1,107 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Http\Middleware\VerifyCsrfToken;
+use App\Models\Playlist;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+/**
+ * Phase 6 — Channel / Studio / Live.
+ *
+ * Covers the handle-alias route, the composer being hidden in preview mode,
+ * and the pluralised playlist meta.
+ */
+class Phase6ChannelTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function setUp(): void
+    {
+        putenv('DB_CONNECTION=sqlite');
+        putenv('DB_DATABASE=:memory:');
+        $_ENV['DB_CONNECTION'] = 'sqlite';
+        $_ENV['DB_DATABASE']   = ':memory:';
+
+        parent::setUp();
+
+        $this->withoutMiddleware([
+            VerifyCsrfToken::class,
+            \Illuminate\Session\Middleware\AuthenticateSession::class,
+        ]);
+    }
+
+    // ─── /@handle alias ─────────────────────────────
+
+    public function test_at_handle_url_opens_the_matching_channel(): void
+    {
+        $user = User::factory()->create([
+            'name'     => 'Handle Test',
+            'username' => 'handletest-'.substr(bin2hex(random_bytes(3)), 0, 6),
+        ]);
+
+        $r = $this->get('/@' . $user->username)->assertOk();
+
+        $r->assertSee('Handle Test', false);
+    }
+
+    public function test_at_handle_rejects_invalid_characters(): void
+    {
+        // Space in the handle must not match the /@ route.
+        $this->get('/@not valid')->assertStatus(404);
+    }
+
+    // ─── Preview-as-visitor hides composer ──────────
+
+    public function test_preview_as_visitor_hides_the_wall_composer(): void
+    {
+        $user = User::factory()->create([
+            'username' => 'preview-'.substr(bin2hex(random_bytes(3)), 0, 6),
+        ]);
+        $this->actingAs($user);
+
+        // The composer form carries id="postForm" and action pointing at
+        // posts.store — specific enough that we don't collide with the
+        // "ch-composer-*" literals that appear in inline JS strings.
+        $owner = $this->get('/channel/' . $user->username)->getContent();
+        $this->assertStringContainsString('id="postForm"', $owner,
+            'Owner should see the composer form in normal view.');
+
+        $preview = $this->get('/channel/' . $user->username . '?preview=1')->getContent();
+        $this->assertStringNotContainsString('id="postForm"', $preview,
+            'Preview-as-visitor must hide the composer form.');
+    }
+
+    // ─── Playlist card: pluralise + hide stray "0.0" ──
+
+    public function test_playlist_card_pluralises_videos_and_hides_zero_views(): void
+    {
+        $owner = User::factory()->create([
+            'username' => 'pl-'.substr(bin2hex(random_bytes(3)), 0, 6),
+        ]);
+        $this->actingAs($owner);
+        $pl = Playlist::create([
+            'user_id'    => $owner->id,
+            'name'       => 'Empty Playlist',
+            'visibility' => 'public',
+            'share_token'=> bin2hex(random_bytes(8)),
+        ]);
+
+        $html = $this->get('/channel/' . $owner->username)->getContent();
+
+        // The specific bug: the view-count row ends with
+        //   `<i class="bi bi-eye" aria-hidden="true"></i> 0.0`
+        // for a zero-view playlist. The fix hides the whole row for zero
+        // views, so the "bi-eye ...0.0" sequence should never appear.
+        $this->assertDoesNotMatchRegularExpression(
+            '/bi-eye[^<]{0,200}0\.0/',
+            $html,
+            'Playlist meta must not emit "bi-eye … 0.0" for zero-view playlists.'
+        );
+
+        // Plural must switch to singular for 1 video. Never "1 videos".
+        $this->assertDoesNotMatchRegularExpression('/\b1 videos\b/i', $html);
+    }
+}