feat(charting): unify configurable time windows

backend/src/media_library_viewer_api/integrations/prometheus.py

@@ -86,7 +86,7 @@ class PrometheusChartWidgetConfig(WidgetConfigBase):
     """A PromQL range query rendered as a multi-series line chart (SC-101..SC-104)."""
 
     promql: str
-    window: str = "1h"  # one of 1h / 6h / 24h / 7d (see WINDOW_PRESETS)
+    window: Literal["5m", "15m", "30m", "1h", "3h", "6h", "12h", "24h", "2d", "7d", "14d", "30d"] = "1h"
     # Display scaling for the Y axis + tooltip. "none" shows raw values; the
     # others auto/force a decimal-prefix unit (kB/MB/GB, kbps/Mbps, etc.).
     unit: Literal[
@@ -116,7 +116,7 @@ class PrometheusMeanWidgetConfig(WidgetConfigBase):
     """A PromQL range query averaged client-side into a single value (SC-112..SC-114)."""
 
     promql: str
-    window: str = "1h"  # one of 1h / 6h / 24h / 7d (see WINDOW_PRESETS)
+    window: Literal["5m", "15m", "30m", "1h", "3h", "6h", "12h", "24h", "2d", "7d", "14d", "30d"] = "1h"
     unit: str | None = None
 
 

backend/src/media_library_viewer_api/integrations/qbittorrent.py

@@ -9,7 +9,7 @@ from __future__ import annotations
 
 from typing import TYPE_CHECKING, Any, Literal
 
-from pydantic import Field
+from pydantic import Field, field_validator
 
 from media_library_viewer_api.clients.qbittorrent import QbittorrentClient
 from media_library_viewer_api.integrations.base import (
@@ -83,7 +83,7 @@ class QbittorrentWidgetConfig(WidgetConfigBase):
 class QbittorrentSpeedWidgetConfig(WidgetConfigBase):
     """Speed chart config. The source returns raw bytes/sec; the frontend scales."""
 
-    window_seconds: int = Field(default=1_800, ge=60, le=86_400)
+    window_seconds: int | Literal["all"] = 1_800
     unit: Literal[
         "none",
         "bytes",
@@ -95,6 +95,16 @@ class QbittorrentSpeedWidgetConfig(WidgetConfigBase):
     ] = "bytes_per_sec"
     scale: Literal["auto", "k", "m", "g", "t"] = "auto"
 
+    @field_validator("window_seconds")
+    @classmethod
+    def validate_window_seconds(cls, value: int | str) -> int | str:
+        """Allow all retained samples while bounding explicit numeric windows."""
+        if value == "all":
+            return value
+        if not isinstance(value, int) or not 60 <= value <= 86_400:
+            raise ValueError("window_seconds must be between 60 and 86400, or 'all'")
+        return value
+
 
 DEFINITION = ServiceDefinition(
     service_type="qbittorrent",

backend/src/media_library_viewer_api/models/scheduler.py

@@ -54,7 +54,8 @@ class SchedulerSample(BaseModel):
 
 class SchedulerSamplesResponse(BaseModel):
     service_id: str
-    window_seconds: int
+    window_seconds: int | None
+    all_values: bool = False
     samples: list[SchedulerSample]
 
 

backend/src/media_library_viewer_api/routers/scheduler.py

@@ -103,14 +103,22 @@ def run_scheduler_action(
 def get_scheduler_samples(
     service_id: str,
     window_seconds: int = Query(default=1_800, ge=60, le=86_400),
+    all_values: bool = Query(default=False),
     store: SettingsStore = Depends(get_settings_store),
 ) -> SchedulerSamplesResponse:
     _require_qbittorrent(service_id, store)
-    since_ts = _safe_int(time.time()) - window_seconds
-    samples = QbittorrentSampleStore().window(service_id, since_ts=since_ts)
+    sample_store = QbittorrentSampleStore()
+    if all_values:
+        samples = sample_store.window(service_id)
+        response_window: int | None = None
+    else:
+        since_ts = _safe_int(time.time()) - window_seconds
+        samples = sample_store.window(service_id, since_ts=since_ts)
+        response_window = window_seconds
     return SchedulerSamplesResponse(
         service_id=service_id,
-        window_seconds=window_seconds,
+        window_seconds=response_window,
+        all_values=all_values,
         samples=samples,
     )
 

backend/src/media_library_viewer_api/widgets/prometheus_range.py

@@ -21,10 +21,18 @@ from typing import Any
 #: Window presets (SC-108, SC-112). Users pick one of these rather than typing
 #: raw ``from``/``to``/``step`` values. Values are window lengths in seconds.
 WINDOW_PRESETS: dict[str, int] = {
+    "5m": 300,
+    "15m": 900,
+    "30m": 1_800,
     "1h": 3_600,
+    "3h": 10_800,
     "6h": 21_600,
+    "12h": 43_200,
     "24h": 86_400,
+    "2d": 172_800,
     "7d": 604_800,
+    "14d": 1_209_600,
+    "30d": 2_592_000,
 }
 
 #: Sentinel values Prometheus serialises for non-finite floats; map these to
@@ -36,9 +44,9 @@ def step_for_window(window_seconds: int, target_points: int = 200) -> int:
     """Derive a scrape ``step`` for a window that yields ~``target_points`` samples.
 
     Clamped to a minimum of 15 seconds so Prometheus does not reject
-    sub-15s resolutions on high-cardinality queries. The spec (SC-104) requires
-    the resulting point count to land in the 100–300 band; with
-    ``target_points=200`` every preset yields 200 points.
+    sub-15s resolutions on high-cardinality queries. The 5m and 15m presets
+    therefore return 20 and 60 points respectively; all longer presets stay
+    in the target 100–300 point band.
     """
     return max(15, round(window_seconds / target_points))
 

backend/src/media_library_viewer_api/widgets/sources.py

@@ -480,12 +480,16 @@ class QbittorrentWidgetSource:
                 return {"error": "qBittorrent widget is missing its service"}
 
             if widget_kind == "speed":
-                window_seconds = _safe_int(
-                    config.get("window_seconds") or service.config.get("sample_retention_seconds") or 1_800
-                )
-                window_seconds = max(60, min(window_seconds, 86_400))
-                since_ts = _safe_int(time.time()) - window_seconds
-                samples = QbittorrentSampleStore().window(service.id, since_ts=since_ts)
+                configured_window = config.get("window_seconds")
+                if configured_window == "all":
+                    samples = QbittorrentSampleStore().window(service.id)
+                else:
+                    window_seconds = _safe_int(
+                        configured_window or service.config.get("sample_retention_seconds") or 1_800
+                    )
+                    window_seconds = max(60, min(window_seconds, 86_400))
+                    since_ts = _safe_int(time.time()) - window_seconds
+                    samples = QbittorrentSampleStore().window(service.id, since_ts=since_ts)
                 series = [
                     {
                         "label": "download",