feat: adopt per-bot account api key for gateway attribution and improve post distinctness

- Add `account_api_key` field to `BotState` and `_adopt_account_api_key()` method that fetches the bot's own `users.api_key` from its profile JSON after auth, switching `LLMClient` to use it instead of the shared bootstrap key, routing gateway spend through the bot's user identity
- Replace `interleave_by_author` with a simpler greedy algorithm that picks the first row whose owner differs from the last picked, removing the multi-queue priority logic
- Extend `_ai_quota` response with `unlimited`, `requests`, and `last_used` fields sourced from new `user_spend_24h()` analytics helper
- Pass `recent_post_titles` from `BotState` into `LLMClient.generate_post()` and add a `distinct_rule` prompt instructing the model to avoid repeating framing, examples, or opinions from the bot's last six posts
- Remove early-return dedup check in `ArticleRegistry.admit` that skipped articles already held by the same bot owner, allowing re-admission under a different category
- Render bot username as a clickable link with avatar in the admin bots table

devplacepy/templates/_comment.html

@@ -24,11 +24,11 @@
         {% include "_attachment_display.html" %}
         {% endif %}
         <div class="comment-actions">
-            <button type="button" class="comment-action-btn" data-action="reply"{{ guest_disabled(user) }}><span class="icon">💬</span> Reply</button>
+            <button type="button" class="comment-action-btn" data-action="reply"{{ guest_disabled(user) }}><span class="icon">💬</span><span class="label"> Reply</span></button>
             {% if owns(item.comment, user) %}
-            <button type="button" class="comment-action-btn" data-action="edit" data-edit-url="/comments/edit/{{ item.comment['uid'] }}"><span class="icon">✏️</span> Edit</button>
+            <button type="button" class="comment-action-btn" data-action="edit" data-edit-url="/comments/edit/{{ item.comment['uid'] }}"><span class="icon">✏️</span><span class="label"> Edit</span></button>
             <form method="POST" action="/comments/delete/{{ item.comment['uid'] }}" class="inline-form comment-delete-form" data-comment-uid="{{ item.comment['uid'] }}">
-                <button type="submit" class="comment-action-btn" data-confirm="Delete this comment?"><span class="icon">🗑️</span> Delete</button>
+                <button type="submit" class="comment-action-btn" data-confirm="Delete this comment?"><span class="icon">🗑️</span><span class="label"> Delete</span></button>
             </form>
             {% endif %}
             {% set _type = "comment" %}{% set _uid = item.comment['uid'] %}{% set _reactions = item.reactions %}{% include "_reaction_bar.html" %}