Clean up generated files and fix 6 dashboard bugs (#142)

* chore: gitignore local/generated files and remove from tracking

Remove user-specific files (MEMORY.md, user_profile.md, prompts.py)
from source control. Add patterns for credentials, backups, and
generated content to .gitignore.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: resolve 6 dashboard bugs — chat, /bugs, /swarm/events, WebSocket, marketplace, sidebar

1. Chat non-functional: CSRF middleware silently blocked HTMX POSTs.
   Added CSRF token transmission via hx-headers in base.html.

2. /bugs → 500: Route missing template vars (total, stats, filter_status).

3. /swarm/events → 500: Called .event_type.value on a plain str
   (SparkEvent.event_type is str, not enum). Also fixed timestamp
   and source field mismatches in the template.

4. WebSocket reconnect loop: No WS endpoint existed at /swarm/live,
   only an HTTP GET. Added @router.websocket("/live") using ws_manager.

5. Marketplace "Agent not found": Nav links /marketplace/ui matched
   the /{agent_id} catch-all. Added explicit /marketplace/ui route
   with enriched template context.

6. Agents sidebar "LOADING...": /swarm/agents/sidebar endpoint was
   missing. Added route returning the existing sidebar partial.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: restore src/timmy/prompts.py to source control

prompts.py is imported by timmy.agent and is production code,
not a user-local file. Re-add to tracking and remove from .gitignore.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Trip T <trip@local>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/dashboard/templates/events.html

@@ -63,14 +63,14 @@
       </thead>
       <tbody>
         {% for event in events %}
-        <tr class="event-row" data-type="{{ event.event_type.value }}">
-          <td class="event-time">{{ event.timestamp[11:19] }}</td>
+        <tr class="event-row" data-type="{{ event.event_type }}">
+          <td class="event-time">{{ event.created_at[11:19] }}</td>
           <td>
-            <span class="mc-badge mc-badge-{{ event.event_type.value.split('.')[0] }}">
-              {{ event.event_type.value }}
+            <span class="mc-badge mc-badge-{{ event.event_type.split('.')[0] }}">
+              {{ event.event_type }}
             </span>
           </td>
-          <td>{{ event.source }}</td>
+          <td>{{ event.agent_id or '-' }}</td>
           <td>
             {% if event.task_id %}
             <a href="/swarm/events?task_id={{ event.task_id }}">{{ event.task_id[:8] }}...</a>