feat(auto): quota-aware AUTO slot scheduling (model tiers, hour/week/month resets) + key scope periods; fix key/slot create/delete UX

internal/config/config.go

@@ -3,6 +3,7 @@
 package config
 
 import (
+	"encoding/json"
 	"fmt"
 	"os"
 	"time"
@@ -120,18 +121,55 @@ func (c *Config) ApplyDefaults() error {
 
 // RuntimeConfig is the persisted web-UI editable slice (sources added/edited).
 type RuntimeConfig struct {
-	Sources []Source `json:"sources"`
-	Keys    []GWKey  `json:"keys,omitempty"`
+	Sources []Source     `json:"sources"`
+	Keys    []GWKey      `json:"keys,omitempty"`
+	Auto    []ModelScope `json:"auto,omitempty"`
 }
 
 // GWKey is a gateway API key persisted in the runtime store. Role is "admin"
 // (full management) or "user" (sees only its own key); Models is the allowed
-// model whitelist (nil/empty = all models).
+// model scope with per-model token quota (0 = unlimited).
 type GWKey struct {
-	Key       string   `json:"key"`
-	Role      string   `json:"role"`
-	Name      string   `json:"name,omitempty"`
-	Models    []string `json:"models,omitempty"`
-	Note      string   `json:"note,omitempty"`
-	CreatedAt int64    `json:"created_at,omitempty"`
+	Key       string       `json:"key"`
+	Role      string       `json:"role"`
+	Name      string       `json:"name,omitempty"`
+	Models    []ModelScope `json:"models,omitempty"`
+	Note      string       `json:"note,omitempty"`
+	CreatedAt int64        `json:"created_at,omitempty"`
+}
+
+// ModelScope is one allowed model for a key, or one AUTO scheduling slot,
+// with an optional token quota and reset period. TokenQuota 0 = unlimited;
+// Period "" = never resets; "hour"/"week"/"month" are fixed windows; "nhour"
+// uses Hours as the window length in hours.
+type ModelScope struct {
+	Model      string `json:"model"`
+	TokenQuota int64  `json:"token_quota"`
+	Period     string `json:"period,omitempty"`
+	Hours      int64  `json:"hours,omitempty"`
+}
+
+// UnmarshalJSON accepts both the legacy "model-id" string form and the
+// {"model":"...","token_quota":N} object form so old runtime files keep
+// loading.
+func (m *ModelScope) UnmarshalJSON(b []byte) error {
+	var s string
+	if err := json.Unmarshal(b, &s); err == nil {
+		m.Model = s
+		return nil
+	}
+	var o struct {
+		Model      string `json:"model"`
+		TokenQuota int64  `json:"token_quota"`
+		Period     string `json:"period"`
+		Hours      int64  `json:"hours"`
+	}
+	if err := json.Unmarshal(b, &o); err != nil {
+		return err
+	}
+	m.Model = o.Model
+	m.TokenQuota = o.TokenQuota
+	m.Period = o.Period
+	m.Hours = o.Hours
+	return nil
 }

internal/config/store.go

@@ -137,4 +137,21 @@ func (s *Store) DeleteKey(key string) (bool, error) {
 	}
 	s.data.Keys = kept
 	return true, s.persistLocked()
+}
+
+// AutoRules returns the persisted AUTO scheduling slots.
+func (s *Store) AutoRules() []ModelScope {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	out := make([]ModelScope, len(s.data.Auto))
+	copy(out, s.data.Auto)
+	return out
+}
+
+// SaveAutoRules persists the AUTO scheduling slots.
+func (s *Store) SaveAutoRules(entries []ModelScope) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.data.Auto = entries
+	return s.persistLocked()
 }