Phase 8: Server health, album filter, Jinja2 engine, password change

5 features implemented:

1. Server health indicator: green/red/yellow dot on each server card.
   Pings Immich in background on page load. New GET /api/servers/{id}/ping.

2. Album selector filter: search input above album list in tracker form.
   Filters by name as you type (case-insensitive). Shows total count.

3. Album last update time: each album in the selector shows its
   updatedAt date. Backend now returns updatedAt from Immich API.

4. Full Jinja2 template engine in notifier:
   - build_full_context() assembles all ~40 variables from blueprint
   - Common date/location detection across assets
   - Per-asset date/location when they differ
   - Favorite indicator, people formatting, asset list with truncation
   - Video warning for Telegram
   - All template slots from TemplateConfig used contextually

5. Password change: PUT /api/auth/password endpoint (validates current
   password, min 6 chars). UI in sidebar footer with inline form.

Also: Phase 9 plan (Telegram bot management) added.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/server/src/immich_watcher_server/services/notifier.py

@@ -1,8 +1,9 @@
-"""Notification dispatch service."""
+"""Notification dispatch service with full Jinja2 template rendering."""
 
 from __future__ import annotations
 
 import logging
+from datetime import datetime
 from typing import Any
 
 import aiohttp
@@ -16,18 +17,125 @@ from ..webhook.client import WebhookClient
 
 _LOGGER = logging.getLogger(__name__)
 
-# Default template used when no custom template is configured
+_env = SandboxedEnvironment(autoescape=False)
+
+# Default template (Jinja2 syntax) when no config is assigned
 DEFAULT_TEMPLATE = (
-    "{{ added_count }} new item(s) added to album \"{{ album_name }}\"."
-    "{% if people %}\nPeople: {{ people | join(', ') }}{% endif %}"
+    '{{ added_count }} new item(s) added to album "{{ album_name }}".'
+    '{% if people %}\nPeople: {{ people | join(", ") }}{% endif %}'
 )
 
 
-def render_template(template_body: str, context: dict[str, Any]) -> str:
-    """Render a Jinja2 template with the given context."""
-    env = SandboxedEnvironment(autoescape=False)
-    tmpl = env.from_string(template_body)
-    return tmpl.render(**context)
+def _render(template_str: str, ctx: dict[str, Any]) -> str:
+    """Render a Jinja2 template string with context. Falls back on error."""
+    try:
+        return _env.from_string(template_str).render(**ctx)
+    except jinja2.TemplateError as e:
+        _LOGGER.error("Template render error: %s", e)
+        return template_str
+
+
+def build_full_context(
+    event_data: dict[str, Any],
+    template_config: TemplateConfig | None = None,
+) -> dict[str, Any]:
+    """Build the full template context with all variables from the blueprint.
+
+    This assembles the ~40 variables the blueprint supports:
+    - Direct event fields (album_name, added_count, etc.)
+    - Computed fields (common_date, common_location, people, assets, video_warning)
+    - Formatted sub-templates (asset items, people format, etc.)
+    """
+    tc = template_config
+    ctx = dict(event_data)
+
+    # People formatting
+    people_list = ctx.get("people", [])
+    if isinstance(people_list, list) and people_list and tc:
+        people_str = ", ".join(str(p) for p in people_list)
+        ctx["people"] = _render(tc.message_people_format, {"people": people_str})
+    elif isinstance(people_list, list):
+        ctx["people"] = ", ".join(str(p) for p in people_list) if people_list else ""
+    else:
+        ctx["people"] = str(people_list) if people_list else ""
+
+    # Asset list formatting
+    added_assets = ctx.get("added_assets", [])
+    if added_assets and tc:
+        date_fmt = tc.date_format or "%d.%m.%Y, %H:%M UTC"
+
+        # Detect common date/location
+        dates = set()
+        locations = set()
+        for a in added_assets:
+            if a.get("created_at"):
+                try:
+                    dt = datetime.fromisoformat(str(a["created_at"]).replace("Z", "+00:00"))
+                    dates.add(dt.strftime(date_fmt))
+                except (ValueError, TypeError):
+                    pass
+            loc_parts = [a.get("city"), a.get("country")]
+            loc = ", ".join(p for p in loc_parts if p)
+            if loc:
+                locations.add(loc)
+
+        common_date = ""
+        if len(dates) == 1:
+            common_date = _render(tc.common_date_template, {"date": next(iter(dates))})
+        ctx["common_date"] = common_date
+
+        common_location = ""
+        if len(locations) == 1:
+            common_location = _render(tc.common_location_template, {"location": next(iter(locations))})
+        ctx["common_location"] = common_location
+
+        # Format individual assets
+        asset_lines = []
+        for a in added_assets:
+            asset_type = a.get("type", "IMAGE")
+            tmpl = tc.message_asset_image if asset_type == "IMAGE" else tc.message_asset_video
+
+            # Per-asset date (only if dates differ)
+            created_if_unique = ""
+            if len(dates) > 1 and a.get("created_at"):
+                try:
+                    dt = datetime.fromisoformat(str(a["created_at"]).replace("Z", "+00:00"))
+                    created_if_unique = _render(tc.date_if_unique_template, {"date": dt.strftime(date_fmt)})
+                except (ValueError, TypeError):
+                    pass
+
+            # Per-asset location
+            location_if_unique = ""
+            loc_parts = [a.get("city"), a.get("country")]
+            loc = ", ".join(p for p in loc_parts if p)
+            if loc and len(locations) > 1:
+                location_if_unique = _render(tc.location_if_unique_template, {"location": loc})
+
+            # Favorite indicator
+            fav = tc.favorite_indicator if a.get("is_favorite") else ""
+
+            asset_ctx = {
+                **a,
+                "created_if_unique": created_if_unique,
+                "location_if_unique": location_if_unique,
+                "location": loc,
+                "is_favorite": fav,
+            }
+            asset_lines.append(_render(tmpl, asset_ctx))
+
+        # Assemble assets list
+        assets_str = "".join(asset_lines)
+        ctx["assets"] = _render(tc.message_assets_format, {"assets": assets_str})
+    else:
+        ctx.setdefault("assets", "")
+        ctx.setdefault("common_date", "")
+        ctx.setdefault("common_location", "")
+
+    # Video warning
+    has_videos = any(a.get("type") == "VIDEO" for a in added_assets) if added_assets else False
+    ctx["video_warning"] = (tc.video_warning if tc and has_videos else "")
+
+    return ctx
 
 
 async def send_notification(
@@ -36,14 +144,7 @@ async def send_notification(
     template_config: TemplateConfig | None = None,
     use_ai_caption: bool = False,
 ) -> dict[str, Any]:
-    """Send a notification to a target using event data.
-
-    Args:
-        target: Notification destination (telegram or webhook)
-        event_data: Album change event data (album_name, added_count, etc.)
-        template_config: Optional template config with per-event templates
-        use_ai_caption: If True, generate caption with Claude AI instead of template
-    """
+    """Send a notification to a target using event data."""
     message = None
 
     # Try AI caption first if enabled
@@ -52,11 +153,12 @@ async def send_notification(
         if is_ai_enabled():
             message = await generate_caption(event_data)
 
-    # Fall back to template rendering
+    # Render with template engine
     if message is None:
+        ctx = build_full_context(event_data, template_config)
+
         template_body = DEFAULT_TEMPLATE
         if template_config:
-            # Select the right template slot based on event type
             change_type = event_data.get("change_type", "")
             slot_map = {
                 "assets_added": "message_assets_added",
@@ -66,18 +168,14 @@ async def send_notification(
             }
             slot = slot_map.get(change_type, "message_assets_added")
             template_body = getattr(template_config, slot, DEFAULT_TEMPLATE) or DEFAULT_TEMPLATE
-        try:
-            message = render_template(template_body, event_data)
-        except jinja2.TemplateError as e:
-            _LOGGER.error("Template rendering failed: %s", e)
-            message = f"Album changed: {event_data.get('album_name', 'unknown')}"
+
+        message = _render(template_body, ctx)
 
     if target.type == "telegram":
         return await _send_telegram(target, message, event_data)
     elif target.type == "webhook":
         return await _send_webhook(target, message, event_data)
-    else:
-        return {"success": False, "error": f"Unknown target type: {target.type}"}
+    return {"success": False, "error": f"Unknown target type: {target.type}"}
 
 
 async def send_test_notification(target: NotificationTarget) -> dict[str, Any]:
@@ -116,7 +214,6 @@ async def _send_telegram(
     async with aiohttp.ClientSession() as session:
         client = TelegramClient(session, bot_token)
 
-        # Build assets list from event data for media sending
         assets = []
         for asset in event_data.get("added_assets", []):
             url = asset.get("download_url") or asset.get("url")
@@ -142,10 +239,7 @@ async def _send_webhook(
     if not url:
         return {"success": False, "error": "Missing url in target config"}
 
-    payload = {
-        "message": message,
-        "event": event_data,
-    }
+    payload = {"message": message, "event": event_data}
 
     async with aiohttp.ClientSession() as session:
         client = WebhookClient(session, url, headers)