feat(dashboard): add time-frame filtering and used-models-only pricing

- All usage endpoints now accept ?period=today|24h|7d|30d|all|custom
  with optional &from=ISO&to=ISO for custom ranges
- Time-series chart adapts granularity: hourly for today/24h, daily for
  7d/30d/all
- Analytics and Costs pages have period selector buttons with custom
  date-range picker
- Pricing table on Costs page now only shows models that have actually
  been used (GET /models?used_only=true)
- Cache-bust version bumped to v=6

src/dashboard/models.rs

@@ -33,6 +33,8 @@ pub(super) struct ModelListParams {
     pub reasoning: Option<bool>,
     /// Only models that have pricing data.
     pub has_cost: Option<bool>,
+    /// Only models that have been used in requests.
+    pub used_only: Option<bool>,
     /// Sort field (name, id, provider, context_limit, input_cost, output_cost).
     pub sort_by: Option<ModelSortBy>,
     /// Sort direction (asc, desc).
@@ -46,6 +48,22 @@ pub(super) async fn handle_get_models(
     let registry = &state.app_state.model_registry;
     let pool = &state.app_state.db_pool;
 
+    // If used_only, fetch the set of models that appear in llm_requests
+    let used_models: Option<std::collections::HashSet<String>> =
+        if params.used_only.unwrap_or(false) {
+            match sqlx::query_scalar::<_, String>(
+                "SELECT DISTINCT model FROM llm_requests",
+            )
+            .fetch_all(pool)
+            .await
+            {
+                Ok(models) => Some(models.into_iter().collect()),
+                Err(_) => Some(std::collections::HashSet::new()),
+            }
+        } else {
+            None
+        };
+
     // Build filter from query params
     let filter = ModelFilter {
         provider: params.provider,
@@ -79,6 +97,14 @@ pub(super) async fn handle_get_models(
 
     for entry in &entries {
         let m_key = entry.model_key;
+
+        // Skip models not in the used set (when used_only is active)
+        if let Some(ref used) = used_models {
+            if !used.contains(m_key) {
+                continue;
+            }
+        }
+
         let m_meta = entry.metadata;
 
         let mut enabled = true;

src/dashboard/usage.rs

@@ -1,16 +1,83 @@
-use axum::{extract::State, response::Json};
+use axum::{
+    extract::{Query, State},
+    response::Json,
+};
 use chrono;
+use serde::Deserialize;
 use serde_json;
 use sqlx::Row;
 use tracing::warn;
 
 use super::{ApiResponse, DashboardState};
 
-pub(super) async fn handle_usage_summary(State(state): State<DashboardState>) -> Json<ApiResponse<serde_json::Value>> {
-    let pool = &state.app_state.db_pool;
+/// Query parameters for time-based filtering on usage endpoints.
+#[derive(Debug, Deserialize, Default)]
+pub(super) struct UsagePeriodFilter {
+    /// Preset period: "today", "24h", "7d", "30d", "all" (default: "all")
+    pub period: Option<String>,
+    /// Custom range start (ISO 8601, e.g. "2025-06-01T00:00:00Z")
+    pub from: Option<String>,
+    /// Custom range end (ISO 8601)
+    pub to: Option<String>,
+}
 
-    // Total stats
-    let total_stats = sqlx::query(
+impl UsagePeriodFilter {
+    /// Returns `(sql_fragment, bind_values)` for a WHERE clause.
+    /// The fragment is either empty (no filter) or " AND timestamp >= ? [AND timestamp <= ?]".
+    fn to_sql(&self) -> (String, Vec<String>) {
+        let period = self.period.as_deref().unwrap_or("all");
+
+        if period == "custom" {
+            let mut clause = String::new();
+            let mut binds = Vec::new();
+            if let Some(ref from) = self.from {
+                clause.push_str(" AND timestamp >= ?");
+                binds.push(from.clone());
+            }
+            if let Some(ref to) = self.to {
+                clause.push_str(" AND timestamp <= ?");
+                binds.push(to.clone());
+            }
+            return (clause, binds);
+        }
+
+        let now = chrono::Utc::now();
+        let cutoff = match period {
+            "today" => {
+                // Start of today (UTC)
+                let today = now.format("%Y-%m-%dT00:00:00Z").to_string();
+                Some(today)
+            }
+            "24h" => Some((now - chrono::Duration::hours(24)).to_rfc3339()),
+            "7d" => Some((now - chrono::Duration::days(7)).to_rfc3339()),
+            "30d" => Some((now - chrono::Duration::days(30)).to_rfc3339()),
+            _ => None, // "all" or unrecognized
+        };
+
+        match cutoff {
+            Some(ts) => (" AND timestamp >= ?".to_string(), vec![ts]),
+            None => (String::new(), vec![]),
+        }
+    }
+
+    /// Determine the time-series granularity label for grouping.
+    fn granularity(&self) -> &'static str {
+        match self.period.as_deref().unwrap_or("all") {
+            "today" | "24h" => "hour",
+            _ => "day",
+        }
+    }
+}
+
+pub(super) async fn handle_usage_summary(
+    State(state): State<DashboardState>,
+    Query(filter): Query<UsagePeriodFilter>,
+) -> Json<ApiResponse<serde_json::Value>> {
+    let pool = &state.app_state.db_pool;
+    let (period_clause, period_binds) = filter.to_sql();
+
+    // Total stats (filtered by period)
+    let period_sql = format!(
         r#"
         SELECT 
             COUNT(*) as total_requests,
@@ -20,9 +87,15 @@ pub(super) async fn handle_usage_summary(State(state): State<DashboardState>) ->
             COALESCE(SUM(cache_read_tokens), 0) as total_cache_read,
             COALESCE(SUM(cache_write_tokens), 0) as total_cache_write
         FROM llm_requests
+        WHERE 1=1 {}
         "#,
-    )
-    .fetch_one(pool);
+        period_clause
+    );
+    let mut q = sqlx::query(&period_sql);
+    for b in &period_binds {
+        q = q.bind(b);
+    }
+    let total_stats = q.fetch_one(pool);
 
     // Today's stats
     let today = chrono::Utc::now().format("%Y-%m-%d").to_string();
@@ -99,41 +172,61 @@ pub(super) async fn handle_usage_summary(State(state): State<DashboardState>) ->
     }
 }
 
-pub(super) async fn handle_time_series(State(state): State<DashboardState>) -> Json<ApiResponse<serde_json::Value>> {
+pub(super) async fn handle_time_series(
+    State(state): State<DashboardState>,
+    Query(filter): Query<UsagePeriodFilter>,
+) -> Json<ApiResponse<serde_json::Value>> {
     let pool = &state.app_state.db_pool;
+    let (period_clause, period_binds) = filter.to_sql();
+    let granularity = filter.granularity();
 
-    let now = chrono::Utc::now();
-    let twenty_four_hours_ago = now - chrono::Duration::hours(24);
+    // Determine the strftime format and default lookback
+    let (strftime_fmt, _label_key, default_lookback) = match granularity {
+        "hour" => ("%H:00", "hour", chrono::Duration::hours(24)),
+        _ => ("%Y-%m-%d", "day", chrono::Duration::days(30)),
+    };
 
-    let result = sqlx::query(
+    // If no period filter, apply a sensible default lookback
+    let (clause, binds) = if period_clause.is_empty() {
+        let cutoff = (chrono::Utc::now() - default_lookback).to_rfc3339();
+        (" AND timestamp >= ?".to_string(), vec![cutoff])
+    } else {
+        (period_clause, period_binds)
+    };
+
+    let sql = format!(
         r#"
         SELECT 
-            strftime('%H:00', timestamp) as hour,
+            strftime('{strftime_fmt}', timestamp) as bucket,
             COUNT(*) as requests,
             COALESCE(SUM(total_tokens), 0) as tokens,
             COALESCE(SUM(cost), 0.0) as cost
         FROM llm_requests
-        WHERE timestamp >= ?
-        GROUP BY hour
-        ORDER BY hour
+        WHERE 1=1 {clause}
+        GROUP BY bucket
+        ORDER BY bucket
         "#,
-    )
-    .bind(twenty_four_hours_ago)
-    .fetch_all(pool)
-    .await;
+    );
+
+    let mut q = sqlx::query(&sql);
+    for b in &binds {
+        q = q.bind(b);
+    }
+
+    let result = q.fetch_all(pool).await;
 
     match result {
         Ok(rows) => {
             let mut series = Vec::new();
 
             for row in rows {
-                let hour: String = row.get("hour");
+                let bucket: String = row.get("bucket");
                 let requests: i64 = row.get("requests");
                 let tokens: i64 = row.get("tokens");
                 let cost: f64 = row.get("cost");
 
                 series.push(serde_json::json!({
-                    "time": hour,
+                    "time": bucket,
                     "requests": requests,
                     "tokens": tokens,
                     "cost": cost,
@@ -142,7 +235,8 @@ pub(super) async fn handle_time_series(State(state): State<DashboardState>) -> J
 
             Json(ApiResponse::success(serde_json::json!({
                 "series": series,
-                "period": "24h"
+                "period": filter.period.as_deref().unwrap_or("all"),
+                "granularity": granularity,
             })))
         }
         Err(e) => {
@@ -152,11 +246,14 @@ pub(super) async fn handle_time_series(State(state): State<DashboardState>) -> J
     }
 }
 
-pub(super) async fn handle_clients_usage(State(state): State<DashboardState>) -> Json<ApiResponse<serde_json::Value>> {
-    // Query database for client usage statistics
+pub(super) async fn handle_clients_usage(
+    State(state): State<DashboardState>,
+    Query(filter): Query<UsagePeriodFilter>,
+) -> Json<ApiResponse<serde_json::Value>> {
     let pool = &state.app_state.db_pool;
+    let (period_clause, period_binds) = filter.to_sql();
 
-    let result = sqlx::query(
+    let sql = format!(
         r#"
         SELECT 
             client_id,
@@ -165,12 +262,19 @@ pub(super) async fn handle_clients_usage(State(state): State<DashboardState>) ->
             COALESCE(SUM(cost), 0.0) as cost,
             MAX(timestamp) as last_request
         FROM llm_requests
+        WHERE 1=1 {}
         GROUP BY client_id
         ORDER BY requests DESC
         "#,
-    )
-    .fetch_all(pool)
-    .await;
+        period_clause
+    );
+
+    let mut q = sqlx::query(&sql);
+    for b in &period_binds {
+        q = q.bind(b);
+    }
+
+    let result = q.fetch_all(pool).await;
 
     match result {
         Ok(rows) => {
@@ -204,11 +308,12 @@ pub(super) async fn handle_clients_usage(State(state): State<DashboardState>) ->
 
 pub(super) async fn handle_providers_usage(
     State(state): State<DashboardState>,
+    Query(filter): Query<UsagePeriodFilter>,
 ) -> Json<ApiResponse<serde_json::Value>> {
-    // Query database for provider usage statistics
     let pool = &state.app_state.db_pool;
+    let (period_clause, period_binds) = filter.to_sql();
 
-    let result = sqlx::query(
+    let sql = format!(
         r#"
         SELECT 
             provider,
@@ -218,12 +323,19 @@ pub(super) async fn handle_providers_usage(
             COALESCE(SUM(cache_read_tokens), 0) as cache_read,
             COALESCE(SUM(cache_write_tokens), 0) as cache_write
         FROM llm_requests
+        WHERE 1=1 {}
         GROUP BY provider
         ORDER BY requests DESC
         "#,
-    )
-    .fetch_all(pool)
-    .await;
+        period_clause
+    );
+
+    let mut q = sqlx::query(&sql);
+    for b in &period_binds {
+        q = q.bind(b);
+    }
+
+    let result = q.fetch_all(pool).await;
 
     match result {
         Ok(rows) => {
@@ -256,10 +368,14 @@ pub(super) async fn handle_providers_usage(
     }
 }
 
-pub(super) async fn handle_detailed_usage(State(state): State<DashboardState>) -> Json<ApiResponse<serde_json::Value>> {
+pub(super) async fn handle_detailed_usage(
+    State(state): State<DashboardState>,
+    Query(filter): Query<UsagePeriodFilter>,
+) -> Json<ApiResponse<serde_json::Value>> {
     let pool = &state.app_state.db_pool;
+    let (period_clause, period_binds) = filter.to_sql();
 
-    let result = sqlx::query(
+    let sql = format!(
         r#"
         SELECT 
             strftime('%Y-%m-%d', timestamp) as date,
@@ -272,13 +388,20 @@ pub(super) async fn handle_detailed_usage(State(state): State<DashboardState>) -
             COALESCE(SUM(cache_read_tokens), 0) as cache_read,
             COALESCE(SUM(cache_write_tokens), 0) as cache_write
         FROM llm_requests
+        WHERE 1=1 {}
         GROUP BY date, client_id, provider, model
         ORDER BY date DESC
-        LIMIT 100
+        LIMIT 200
         "#,
-    )
-    .fetch_all(pool)
-    .await;
+        period_clause
+    );
+
+    let mut q = sqlx::query(&sql);
+    for b in &period_binds {
+        q = q.bind(b);
+    }
+
+    let result = q.fetch_all(pool).await;
 
     match result {
         Ok(rows) => {
@@ -310,19 +433,32 @@ pub(super) async fn handle_detailed_usage(State(state): State<DashboardState>) -
 
 pub(super) async fn handle_analytics_breakdown(
     State(state): State<DashboardState>,
+    Query(filter): Query<UsagePeriodFilter>,
 ) -> Json<ApiResponse<serde_json::Value>> {
     let pool = &state.app_state.db_pool;
+    let (period_clause, period_binds) = filter.to_sql();
 
     // Model breakdown
-    let models =
-        sqlx::query("SELECT model as label, COUNT(*) as value FROM llm_requests GROUP BY model ORDER BY value DESC")
-            .fetch_all(pool);
+    let model_sql = format!(
+        "SELECT model as label, COUNT(*) as value FROM llm_requests WHERE 1=1 {} GROUP BY model ORDER BY value DESC",
+        period_clause
+    );
+    let mut mq = sqlx::query(&model_sql);
+    for b in &period_binds {
+        mq = mq.bind(b);
+    }
+    let models = mq.fetch_all(pool);
 
     // Client breakdown
-    let clients = sqlx::query(
-        "SELECT client_id as label, COUNT(*) as value FROM llm_requests GROUP BY client_id ORDER BY value DESC",
-    )
-    .fetch_all(pool);
+    let client_sql = format!(
+        "SELECT client_id as label, COUNT(*) as value FROM llm_requests WHERE 1=1 {} GROUP BY client_id ORDER BY value DESC",
+        period_clause
+    );
+    let mut cq = sqlx::query(&client_sql);
+    for b in &period_binds {
+        cq = cq.bind(b);
+    }
+    let clients = cq.fetch_all(pool);
 
     match tokio::join!(models, clients) {
         (Ok(m_rows), Ok(c_rows)) => {

static/css/dashboard.css

@@ -1069,6 +1069,28 @@ body {
     font-size: 0.75rem;
 }
 
+/* Period Selector */
+.period-selector {
+    display: flex;
+    gap: 0.25rem;
+    flex-wrap: wrap;
+}
+
+.period-selector .btn.active {
+    background: var(--blue);
+    color: var(--bg0);
+    border-color: var(--blue);
+}
+
+.input-sm {
+    padding: 0.35rem 0.5rem;
+    font-size: 0.8rem;
+    background: var(--bg1);
+    border: 1px solid var(--bg3);
+    border-radius: 4px;
+    color: var(--fg1);
+}
+
 /* Toast Container */
 .toast-container {
     position: fixed;

static/index.html

@@ -4,7 +4,7 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>LLM Proxy Gateway - Admin Dashboard</title>
-    <link rel="stylesheet" href="/css/dashboard.css?v=5">
+    <link rel="stylesheet" href="/css/dashboard.css?v=6">
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
     <link rel="icon" href="img/logo-icon.png" type="image/png" sizes="any">
     <link rel="apple-touch-icon" href="img/logo-icon.png">
@@ -166,19 +166,19 @@
     </div>
 
     <!-- Scripts (cache-busted with version query params) -->
-    <script src="/js/api.js?v=5"></script>
-    <script src="/js/auth.js?v=5"></script>
-    <script src="/js/dashboard.js?v=5"></script>
-    <script src="/js/websocket.js?v=5"></script>
-    <script src="/js/charts.js?v=5"></script>
-    <script src="/js/pages/overview.js?v=5"></script>
-    <script src="/js/pages/analytics.js?v=5"></script>
-    <script src="/js/pages/costs.js?v=5"></script>
-    <script src="/js/pages/clients.js?v=5"></script>
-    <script src="/js/pages/providers.js?v=5"></script>
-    <script src="/js/pages/models.js?v=5"></script>
-    <script src="/js/pages/monitoring.js?v=5"></script>
-    <script src="/js/pages/settings.js?v=5"></script>
-    <script src="/js/pages/logs.js?v=5"></script>
+    <script src="/js/api.js?v=6"></script>
+    <script src="/js/auth.js?v=6"></script>
+    <script src="/js/dashboard.js?v=6"></script>
+    <script src="/js/websocket.js?v=6"></script>
+    <script src="/js/charts.js?v=6"></script>
+    <script src="/js/pages/overview.js?v=6"></script>
+    <script src="/js/pages/analytics.js?v=6"></script>
+    <script src="/js/pages/costs.js?v=6"></script>
+    <script src="/js/pages/clients.js?v=6"></script>
+    <script src="/js/pages/providers.js?v=6"></script>
+    <script src="/js/pages/models.js?v=6"></script>
+    <script src="/js/pages/monitoring.js?v=6"></script>
+    <script src="/js/pages/settings.js?v=6"></script>
+    <script src="/js/pages/logs.js?v=6"></script>
 </body>
 </html>

static/js/dashboard.js

@@ -317,6 +317,15 @@ class Dashboard {
                         <p class="card-subtitle">Request volume and token distribution</p>
                     </div>
                     <div class="card-actions">
+                        <div class="period-selector" id="analytics-period">
+                            <button class="btn btn-secondary btn-sm active" data-period="24h">24h</button>
+                            <button class="btn btn-secondary btn-sm" data-period="7d">7 Days</button>
+                            <button class="btn btn-secondary btn-sm" data-period="30d">30 Days</button>
+                            <button class="btn btn-secondary btn-sm" data-period="all">All</button>
+                            <button class="btn btn-secondary btn-sm" data-period="custom">
+                                <i class="fas fa-calendar"></i> Custom
+                            </button>
+                        </div>
                         <button class="btn btn-secondary" id="export-data">
                             <i class="fas fa-download"></i> Export CSV
                         </button>
@@ -325,6 +334,13 @@ class Dashboard {
                         </button>
                     </div>
                 </div>
+                <div id="analytics-custom-range" style="display:none; padding: 0 1.5rem 1rem; gap: 0.5rem; align-items: center;">
+                    <label style="font-size:0.85rem; color:var(--fg4);">From</label>
+                    <input type="date" id="analytics-from" class="input-sm">
+                    <label style="font-size:0.85rem; color:var(--fg4);">To</label>
+                    <input type="date" id="analytics-to" class="input-sm">
+                    <button class="btn btn-primary btn-sm" id="analytics-apply-custom">Apply</button>
+                </div>
                 <div class="chart-container" style="height: 400px;">
                     <canvas id="analytics-chart"></canvas>
                 </div>
@@ -359,6 +375,33 @@ class Dashboard {
 
     getCostsTemplate() {
         return `
+            <div class="card" style="margin-bottom: 1.5rem;">
+                <div class="card-header">
+                    <div>
+                        <h3 class="card-title">Cost Overview</h3>
+                        <p class="card-subtitle">Spending and pricing across providers</p>
+                    </div>
+                    <div class="card-actions">
+                        <div class="period-selector" id="costs-period">
+                            <button class="btn btn-secondary btn-sm" data-period="today">Today</button>
+                            <button class="btn btn-secondary btn-sm active" data-period="7d">7 Days</button>
+                            <button class="btn btn-secondary btn-sm" data-period="30d">30 Days</button>
+                            <button class="btn btn-secondary btn-sm" data-period="all">All Time</button>
+                            <button class="btn btn-secondary btn-sm" data-period="custom">
+                                <i class="fas fa-calendar"></i> Custom
+                            </button>
+                        </div>
+                    </div>
+                </div>
+                <div id="costs-custom-range" style="display:none; padding: 0 1.5rem 1rem; gap: 0.5rem; align-items: center;">
+                    <label style="font-size:0.85rem; color:var(--fg4);">From</label>
+                    <input type="date" id="costs-from" class="input-sm">
+                    <label style="font-size:0.85rem; color:var(--fg4);">To</label>
+                    <input type="date" id="costs-to" class="input-sm">
+                    <button class="btn btn-primary btn-sm" id="costs-apply-custom">Apply</button>
+                </div>
+            </div>
+
             <div class="stats-grid" id="cost-stats"></div>
             
             <div class="grid-2">
@@ -378,7 +421,7 @@ class Dashboard {
 
             <div class="card">
                 <div class="card-header">
-                    <h3 class="card-title">Active Model Pricing</h3>
+                    <h3 class="card-title">Model Pricing (Used Models)</h3>
                 </div>
                 <div class="table-container">
                     <table class="table" id="pricing-table">

static/js/pages/analytics.js

@@ -3,7 +3,7 @@
 class AnalyticsPage {
     constructor() {
         this.filters = {
-            dateRange: '7d',
+            dateRange: '24h',
             client: 'all',
             provider: 'all'
         };
@@ -11,17 +11,29 @@ class AnalyticsPage {
     }
 
     async init() {
-        // Load data
         await Promise.all([
             this.loadClients(),
             this.loadCharts(),
             this.loadUsageData()
         ]);
-        
-        // Setup event listeners
+
         this.setupEventListeners();
     }
 
+    /** Build query string from current period filter. */
+    periodQuery() {
+        const p = this.filters.dateRange;
+        if (p === 'custom') {
+            const from = document.getElementById('analytics-from')?.value;
+            const to = document.getElementById('analytics-to')?.value;
+            let qs = '?period=custom';
+            if (from) qs += `&from=${from}T00:00:00Z`;
+            if (to) qs += `&to=${to}T23:59:59Z`;
+            return qs;
+        }
+        return `?period=${p}`;
+    }
+
     async loadClients() {
         try {
             const clients = await window.api.get('/clients');
@@ -34,13 +46,11 @@ class AnalyticsPage {
     renderClientFilter(clients) {
         const select = document.getElementById('client-filter');
         if (!select) return;
-        
-        // Clear existing options except "All Clients"
+
         while (select.options.length > 1) {
             select.remove(1);
         }
-        
-        // Add client options
+
         clients.forEach(client => {
             const option = document.createElement('option');
             option.value = client.id;
@@ -58,19 +68,21 @@ class AnalyticsPage {
             return;
         }
 
-        // Fetch each data source independently so one failure doesn't kill the others
+        const qs = this.periodQuery();
+
         const [timeSeriesResult, breakdownResult] = await Promise.allSettled([
-            window.api.get('/usage/time-series'),
-            window.api.get('/analytics/breakdown')
+            window.api.get(`/usage/time-series${qs}`),
+            window.api.get(`/analytics/breakdown${qs}`)
         ]);
 
         // Time-series chart
         if (timeSeriesResult.status === 'fulfilled') {
-            const series = timeSeriesResult.value.series || [];
+            const resp = timeSeriesResult.value;
+            const series = resp.series || [];
             if (series.length > 0) {
-                this.renderAnalyticsChart(series);
+                this.renderAnalyticsChart(series, resp.granularity);
             } else {
-                this.showEmptyChart('analytics-chart', 'No request data in the last 24 hours');
+                this.showEmptyChart('analytics-chart', 'No request data for this period');
             }
         } else {
             console.error('Error loading time series:', timeSeriesResult.reason);
@@ -86,13 +98,13 @@ class AnalyticsPage {
             if (clients.length > 0) {
                 this.renderClientsChart(clients);
             } else {
-                this.showEmptyChart('clients-chart', 'No client data available');
+                this.showEmptyChart('clients-chart', 'No client data for this period');
             }
 
             if (models.length > 0) {
                 this.renderModelsChart(models);
             } else {
-                this.showEmptyChart('models-chart', 'No model data available');
+                this.showEmptyChart('models-chart', 'No model data for this period');
             }
         } else {
             console.error('Error loading analytics breakdown:', breakdownResult.reason);
@@ -118,28 +130,38 @@ class AnalyticsPage {
         }
     }
 
-    renderAnalyticsChart(series) {
+    renderAnalyticsChart(series, granularity) {
         const cm = window.chartManager;
         if (!cm) return;
+
+        const labels = series.map(s => {
+            // For daily granularity, shorten the date label
+            if (granularity === 'day') {
+                const d = luxon.DateTime.fromISO(s.time);
+                return d.isValid ? d.toFormat('MMM dd') : s.time;
+            }
+            return s.time;
+        });
+
         const data = {
-            labels: series.map(s => s.time),
+            labels,
             datasets: [
                 {
                     label: 'Requests',
                     data: series.map(s => s.requests),
-                    color: '#fe8019', // orange
+                    color: '#fe8019',
                     fill: true
                 },
                 {
                     label: 'Tokens',
                     data: series.map(s => s.tokens),
-                    color: '#b8bb26', // green
+                    color: '#b8bb26',
                     fill: true,
                     hidden: true
                 }
             ]
         };
-        
+
         cm.createLineChart('analytics-chart', data);
     }
 
@@ -151,10 +173,10 @@ class AnalyticsPage {
             datasets: [{
                 label: 'Requests',
                 data: clients.map(c => c.value),
-                color: '#83a598' // blue
+                color: '#83a598'
             }]
         };
-        
+
         cm.createHorizontalBarChart('clients-chart', data);
     }
 
@@ -166,13 +188,14 @@ class AnalyticsPage {
             data: models.map(m => m.value),
             colors: cm.defaultColors
         };
-        
+
         cm.createDoughnutChart('models-chart', data);
     }
 
     async loadUsageData() {
         try {
-            const usageData = await window.api.get('/usage/detailed');
+            const qs = this.periodQuery();
+            const usageData = await window.api.get(`/usage/detailed${qs}`);
             this.renderUsageTable(usageData);
         } catch (error) {
             console.error('Error loading usage data:', error);
@@ -182,9 +205,9 @@ class AnalyticsPage {
     renderUsageTable(data) {
         const tableBody = document.querySelector('#usage-table tbody');
         if (!tableBody) return;
-        
+
         if (data.length === 0) {
-            tableBody.innerHTML = '<tr><td colspan="9" class="text-center">No historical data found</td></tr>';
+            tableBody.innerHTML = '<tr><td colspan="9" class="text-center">No usage data for this period</td></tr>';
             return;
         }
 
@@ -212,17 +235,47 @@ class AnalyticsPage {
         if (refreshBtn) {
             refreshBtn.onclick = () => this.refresh();
         }
-        
-        // Export button
+
         const exportBtn = document.getElementById('export-data');
         if (exportBtn) {
             exportBtn.onclick = () => this.exportData();
         }
+
+        // Period selector buttons
+        const periodContainer = document.getElementById('analytics-period');
+        if (periodContainer) {
+            periodContainer.querySelectorAll('[data-period]').forEach(btn => {
+                btn.onclick = () => {
+                    // Toggle active class
+                    periodContainer.querySelectorAll('[data-period]').forEach(b => b.classList.remove('active'));
+                    btn.classList.add('active');
+
+                    const period = btn.dataset.period;
+                    this.filters.dateRange = period;
+
+                    // Show/hide custom range inputs
+                    const customRange = document.getElementById('analytics-custom-range');
+                    if (customRange) {
+                        customRange.style.display = period === 'custom' ? 'flex' : 'none';
+                    }
+
+                    if (period !== 'custom') {
+                        this.refresh();
+                    }
+                };
+            });
+        }
+
+        // Custom range apply button
+        const applyCustom = document.getElementById('analytics-apply-custom');
+        if (applyCustom) {
+            applyCustom.onclick = () => this.refresh();
+        }
     }
 
     async exportData() {
-        // Simple CSV export
-        const data = await window.api.get('/usage/detailed');
+        const qs = this.periodQuery();
+        const data = await window.api.get(`/usage/detailed${qs}`);
         if (!data || data.length === 0) return;
 
         const headers = Object.keys(data[0]).join(',');

static/js/pages/costs.js

@@ -3,42 +3,73 @@
 class CostsPage {
     constructor() {
         this.costData = null;
+        this.period = '7d';
         this.init();
     }
 
     async init() {
-        // Load data
         await Promise.all([
             this.loadCostStats(),
             this.loadCostsChart(),
             this.loadBudgetTracking(),
             this.loadPricingTable()
         ]);
-        
-        // Setup event listeners
+
         this.setupEventListeners();
     }
 
+    /** Build query string from the current period. */
+    periodQuery() {
+        if (this.period === 'custom') {
+            const from = document.getElementById('costs-from')?.value;
+            const to = document.getElementById('costs-to')?.value;
+            let qs = '?period=custom';
+            if (from) qs += `&from=${from}T00:00:00Z`;
+            if (to) qs += `&to=${to}T23:59:59Z`;
+            return qs;
+        }
+        return `?period=${this.period}`;
+    }
+
     async loadCostStats() {
         try {
-            const data = await window.api.get('/usage/summary');
-            
+            const qs = this.periodQuery();
+            const data = await window.api.get(`/usage/summary${qs}`);
+
+            const totalCost = data.total_cost;
+            const totalTokens = data.total_tokens || 0;
+            const cacheReadTokens = data.total_cache_read_tokens || 0;
+            const cacheWriteTokens = data.total_cache_write_tokens || 0;
+            const todayCost = data.today_cost;
+            const totalRequests = data.total_requests;
+
+            // Compute days in the period for daily average
+            let periodDays = 1;
+            if (this.period === '7d') periodDays = 7;
+            else if (this.period === '30d') periodDays = 30;
+            else if (this.period === 'today') periodDays = 1;
+            else if (this.period === 'all') periodDays = Math.max(1, 30); // rough fallback
+            else if (this.period === 'custom') {
+                const from = document.getElementById('costs-from')?.value;
+                const to = document.getElementById('costs-to')?.value;
+                if (from && to) {
+                    const diff = (new Date(to) - new Date(from)) / (1000 * 60 * 60 * 24);
+                    periodDays = Math.max(1, Math.ceil(diff));
+                }
+            }
+
             this.costData = {
-                totalCost: data.total_cost,
-                todayCost: data.today_cost,
-                weekCost: data.total_cost * 0.4, // Placeholder for weekly logic
-                monthCost: data.total_cost,
-                avgDailyCost: data.total_cost / 30, // Simplified
-                costTrend: 5.2,
-                budgetUsed: Math.min(Math.round((data.total_cost / 100) * 100), 100), // Assuming $100 budget
-                projectedMonthEnd: data.today_cost * 30,
-                cacheReadTokens: data.total_cache_read_tokens || 0,
-                cacheWriteTokens: data.total_cache_write_tokens || 0,
-                totalTokens: data.total_tokens || 0,
+                totalCost,
+                todayCost,
+                totalRequests,
+                avgDailyCost: totalCost / periodDays,
+                cacheReadTokens,
+                cacheWriteTokens,
+                totalTokens,
             };
-            
+
             this.renderCostStats();
-            
+
         } catch (error) {
             console.error('Error loading cost stats:', error);
         }
@@ -51,7 +82,15 @@ class CostsPage {
         const cacheHitRate = this.costData.totalTokens > 0
             ? ((this.costData.cacheReadTokens / this.costData.totalTokens) * 100).toFixed(1)
             : '0.0';
-        
+
+        const periodLabel = {
+            'today': 'Today',
+            '7d': 'Past 7 Days',
+            '30d': 'Past 30 Days',
+            'all': 'All Time',
+            'custom': 'Custom Range',
+        }[this.period] || this.period;
+
         container.innerHTML = `
             <div class="stat-card">
                 <div class="stat-icon warning">
@@ -66,21 +105,34 @@ class CostsPage {
                     </div>
                 </div>
             </div>
-            
+
             <div class="stat-card">
                 <div class="stat-icon success">
                     <i class="fas fa-calendar-alt"></i>
                 </div>
                 <div class="stat-content">
-                    <div class="stat-value">${window.api.formatCurrency(this.costData.monthCost)}</div>
-                    <div class="stat-label">This Month</div>
+                    <div class="stat-value">${periodLabel}</div>
+                    <div class="stat-label">Period</div>
                     <div class="stat-change">
-                        <i class="fas fa-chart-line"></i>
-                        ${window.api.formatCurrency(this.costData.avgDailyCost)}/day avg
+                        ${this.costData.totalRequests.toLocaleString()} requests
                     </div>
                 </div>
             </div>
-            
+
+            <div class="stat-card">
+                <div class="stat-icon primary">
+                    <i class="fas fa-chart-line"></i>
+                </div>
+                <div class="stat-content">
+                    <div class="stat-value">${window.api.formatCurrency(this.costData.avgDailyCost)}</div>
+                    <div class="stat-label">Daily Average</div>
+                    <div class="stat-change">
+                        <i class="fas fa-bolt"></i>
+                        ${cacheHitRate}% cache hit rate
+                    </div>
+                </div>
+            </div>
+
             <div class="stat-card">
                 <div class="stat-icon primary">
                     <i class="fas fa-bolt"></i>
@@ -93,19 +145,6 @@ class CostsPage {
                     </div>
                 </div>
             </div>
-            
-            <div class="stat-card">
-                <div class="stat-icon danger">
-                    <i class="fas fa-piggy-bank"></i>
-                </div>
-                <div class="stat-content">
-                    <div class="stat-value">${this.costData.budgetUsed}%</div>
-                    <div class="stat-label">Budget Used</div>
-                    <div class="stat-change">
-                        $${this.costData.projectedMonthEnd.toFixed(2)} projected
-                    </div>
-                </div>
-            </div>
         `;
     }
 
@@ -114,13 +153,14 @@ class CostsPage {
             const cm = window.chartManager || await window.waitForChartManager();
             if (!cm) { this.showEmptyChart('costs-chart', 'Chart system unavailable'); return; }
 
-            const data = await window.api.get('/usage/providers');
+            const qs = this.periodQuery();
+            const data = await window.api.get(`/usage/providers${qs}`);
 
             if (!data || data.length === 0) {
-                this.showEmptyChart('costs-chart', 'No provider spending data yet');
+                this.showEmptyChart('costs-chart', 'No provider spending data for this period');
                 return;
             }
-            
+
             const chartData = {
                 labels: data.map(item => item.provider),
                 datasets: [{
@@ -129,9 +169,9 @@ class CostsPage {
                     color: '#fe8019'
                 }]
             };
-            
+
             cm.createBarChart('costs-chart', chartData);
-            
+
         } catch (error) {
             console.error('Error loading costs chart:', error);
             this.showEmptyChart('costs-chart', 'Failed to load spending data');
@@ -158,15 +198,15 @@ class CostsPage {
     async loadBudgetTracking() {
         const container = document.getElementById('budget-progress');
         if (!container) return;
-        
+
         try {
             const providers = await window.api.get('/providers');
-            
+
             container.innerHTML = providers.filter(p => p.id !== 'ollama').map(provider => {
-                const used = provider.low_credit_threshold; // Not quite right but using available fields
+                const used = provider.low_credit_threshold;
                 const balance = provider.credit_balance;
                 const percentage = balance > 0 ? Math.max(0, Math.min(100, (1 - (used / balance)) * 100)) : 0;
-                
+
                 return `
                     <div class="budget-item" style="margin-bottom: 1.5rem;">
                         <div class="budget-header" style="display: flex; justify-content: space-between; margin-bottom: 0.5rem;">
@@ -190,7 +230,8 @@ class CostsPage {
 
     async loadPricingTable() {
         try {
-            const data = await window.api.get('/models');
+            // Only show models that have actually been used
+            const data = await window.api.get('/models?used_only=true');
             this.renderPricingTable(data);
         } catch (error) {
             console.error('Error loading pricing data:', error);
@@ -200,7 +241,12 @@ class CostsPage {
     renderPricingTable(data) {
         const tableBody = document.querySelector('#pricing-table tbody');
         if (!tableBody) return;
-        
+
+        if (!data || data.length === 0) {
+            tableBody.innerHTML = '<tr><td colspan="6" class="text-center" style="color:var(--fg4);">No models have been used yet</td></tr>';
+            return;
+        }
+
         tableBody.innerHTML = data.map(row => {
             const cacheRead = row.cache_read_cost != null
                 ? `${window.api.formatCurrency(row.cache_read_cost)} / 1M`
@@ -222,14 +268,42 @@ class CostsPage {
     }
 
     setupEventListeners() {
-        // ...
+        // Period selector buttons
+        const periodContainer = document.getElementById('costs-period');
+        if (periodContainer) {
+            periodContainer.querySelectorAll('[data-period]').forEach(btn => {
+                btn.onclick = () => {
+                    periodContainer.querySelectorAll('[data-period]').forEach(b => b.classList.remove('active'));
+                    btn.classList.add('active');
+
+                    const period = btn.dataset.period;
+                    this.period = period;
+
+                    // Show/hide custom range inputs
+                    const customRange = document.getElementById('costs-custom-range');
+                    if (customRange) {
+                        customRange.style.display = period === 'custom' ? 'flex' : 'none';
+                    }
+
+                    if (period !== 'custom') {
+                        this.refresh();
+                    }
+                };
+            });
+        }
+
+        // Custom range apply button
+        const applyCustom = document.getElementById('costs-apply-custom');
+        if (applyCustom) {
+            applyCustom.onclick = () => this.refresh();
+        }
     }
 
     refresh() {
         this.loadCostStats();
         this.loadCostsChart();
         this.loadBudgetTracking();
-        this.loadPricingTable();
+        // Pricing table doesn't change with period (it's model metadata, not usage)
     }
 }