fix: video track kind detection and Confluence page creation

- Video track kind is 2 (not 0) in LiveKit Python SDK — camera was never captured
- Replace broken confluence_collab.create_page import with direct REST API call

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

voice.py

@@ -373,18 +373,32 @@ async def _confluence_update_section(page_id: str, section_heading: str, new_htm
 
 async def _confluence_create_page(space_key: str, title: str, body_html: str,
                                    parent_id: str | None = None) -> dict:
-    """Create a new Confluence page. Returns {id, title, url}."""
+    """Create a new Confluence page via REST API. Returns {id, title, url}."""
     if not CONFLUENCE_URL or not CONFLUENCE_USER or not CONFLUENCE_TOKEN:
         raise RuntimeError("Confluence credentials not configured")
-    from confluence_collab.client import Auth, create_page
 
-    auth = Auth(base_url=CONFLUENCE_URL, username=CONFLUENCE_USER, api_token=CONFLUENCE_TOKEN)
-    page = await create_page(space_key, title, body_html, auth, parent_id=parent_id)
-    return {
-        "id": page.page_id,
-        "title": page.title,
-        "url": f"{CONFLUENCE_URL}/pages/viewpage.action?pageId={page.page_id}",
+    payload: dict = {
+        "type": "page",
+        "title": title,
+        "space": {"key": space_key},
+        "body": {"storage": {"value": body_html, "representation": "storage"}},
     }
+    if parent_id:
+        payload["ancestors"] = [{"id": parent_id}]
+
+    async with httpx.AsyncClient(timeout=15.0) as client:
+        resp = await client.post(
+            f"{CONFLUENCE_URL}/rest/api/content",
+            json=payload,
+            auth=(CONFLUENCE_USER, CONFLUENCE_TOKEN),
+        )
+        resp.raise_for_status()
+        data = resp.json()
+        return {
+            "id": data["id"],
+            "title": data["title"],
+            "url": f"{CONFLUENCE_URL}/pages/viewpage.action?pageId={data['id']}",
+        }
 
 
 async def _confluence_recent_pages(limit: int = 5) -> list[dict]:
@@ -649,7 +663,7 @@ class VoiceSession:
                 # skips HKDF derivation → raw key stored → DEC_FAILED.
                 # Solution: set caller key HERE, after frame cryptor is initialized.
                 # Store video track for on-demand vision (look_at_screen tool)
-                if int(t.kind) == 0:  # video track
+                if int(t.kind) == 2:  # video track (LiveKit: 1=audio, 2=video)
                     self._video_track = t
                     logger.info("Video track stored from %s for on-demand vision", p.identity)
                 if int(t.kind) == 1 and e2ee_opts is not None:  # audio track only