Move remaining static inline styles into dashboard.css, bump Now Playing text size

Three inline style="..." attributes were pure styling with no per-request
data behind them (a hero-block spacing tweak, a trailing note's margin, a
gap between two stacked rows) — moved each into dashboard.css as a scoped
structural selector so future adjustments happen in one place instead of
being split between the template and the stylesheet.

Also bumped .stream-title/.stream-user/.stream-icon in the Now Playing
card one step up the existing --fs-* scale (13px->15px, 12px->13px,
15px->18px) rather than introducing a one-off size.

Documented the "styles belong in CSS, not inline" rule in CLAUDE.md,
with the actual exception: per-request computed values (a meter's width,
a threshold colour) and JS-toggled initial visibility still can't live
in a static stylesheet and are fine to stay inline.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

templates/dashboard.html

@@ -130,7 +130,7 @@
                 <span id="sab-timeleft-row" style="display:none;"> · ETA <span id="sab-timeleft"></span></span>
               </div>
             </div>
-            <dl class="stats" style="margin-top:0.9rem;">
+            <dl class="stats">
               <div><dt>Avg speed (7d)</dt><dd>{{ sabnzbd.avg_speed }}</dd></div>
               <div><dt>Grabbed (7d)</dt><dd>{{ sabnzbd.completed_7d }}</dd></div>
               <div><dt>Volume (7d)</dt><dd>{{ sabnzbd.week_size }}</dd></div>
@@ -168,7 +168,7 @@
               {% if unraid.disk_count %}<span>{{ unraid.disk_count }} disk{{ 's' if unraid.disk_count != 1 }}</span>{% endif %}
             </div>
             {% if unraid.source == "local" %}
-            <p class="empty" style="margin-bottom:0;">Container disk usage ({{ unraid.mount }}). Set <code>UNRAID_API_KEY</code> for full array stats.</p>
+            <p class="empty">Container disk usage ({{ unraid.mount }}). Set <code>UNRAID_API_KEY</code> for full array stats.</p>
             {% endif %}
 
             {% if unraid.disks or unraid.caches %}
@@ -520,7 +520,7 @@
       </div>
 
       {% if tautulli.top_tv_list or tautulli.top_movie_list %}
-      <div class="row cols-2" style="margin-top: var(--gap);">
+      <div class="row cols-2">
         <div class="card">
           <div class="card-header"><h3>Top TV</h3></div>
           <div class="card-body">