ui: aggregated read on top, hide stale rows, wire /log tone toggle; prompts v8

- dashboard grid: explicit "header" area as the first row so the
    aggregated read panel renders at the top instead of being
    auto-placed after the named areas.
  - indicators: hide rows flagged stale (older than the group's
    freshness threshold). Server still computes stale_symbols;
    rendering can be re-enabled by removing the
    `{% if not is_stale %}` wrapper in indicators.html.
  - /log: add tone-changed to #log-content's hx-trigger and include
    it in cassandraSetTone's selector list — toggling Novice /
    Intermediate on the Log page was previously a no-op.
  - prompts: bump PROMPT_VERSION 7→8. Strengthen the rational-vs-
    irrational framing in the strategic-log system prompt from
    aspirational to mandatory ("a paragraph without both lenses must
    be rewritten"). Require the same lens in the per-group summary,
    cross-asset aggregate, and portfolio commentary overrides.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/templates/partials/indicators.html

@@ -30,7 +30,12 @@
   <tbody>
   {% for q in quotes %}
     {% set is_stale = stale_symbols and q.symbol in stale_symbols %}
-    <tr class="{% if is_stale %}row-stale{% endif %}">
+    {# Stale rows (last observation older than the group's freshness
+       threshold) are hidden from the default UI but the server still
+       computes them — remove the `{% if not is_stale %}` guard to
+       resurface the dimmed row + stale tag. #}
+    {% if not is_stale %}
+    <tr>
       {% set tip = notes.get(q.symbol, '') if notes else '' %}
       {# Long Eurostat ('dataset?...') and ONS ('topic/.../cdid/dataset') symbols
          get truncated for display; hover shows the full identifier via title.
@@ -39,7 +44,7 @@
       {% if '?' in short_sym %}{% set short_sym = short_sym.split('?')[0] %}{% endif %}
       {% if '/' in short_sym %}{% set short_sym = short_sym.split('/')[-2] | upper %}{% endif %}
       <td class="label has-tip" title="{{ q.symbol }}{% if tip %} — {{ tip }}{% endif %}">
-        {{ short_sym }}{% if is_stale %} <span class="stale-tag" title="last observation older than 90 days">stale</span>{% endif %}
+        {{ short_sym }}
       </td>
       <td {% if tip %}title="{{ tip }}"{% endif %}>{{ q.label or "" }}</td>
       <td class="num">{{ q.price | price }}</td>
@@ -58,6 +63,7 @@
       {% endif %}
       <td class="neu">{{ q.as_of or "" }}</td>
     </tr>
+    {% endif %}
   {% endfor %}
   </tbody>
 </table>