feat: add search/album/genre filtering and /albums + /genres browse pages

DeepDrftAPI/Controllers/TrackController.cs

@@ -47,17 +47,24 @@ public class TrackController : ControllerBase
     // These are declared before the parameterized "{trackId}" / "{id:long}" actions so route
     // resolution never treats "page", "upload", or "meta" as a trackId.
 
-    // GET api/track/page?page=1&pageSize=20&sortColumn=TrackName&sortDescending=false
+    // GET api/track/page?page=1&pageSize=20&sortColumn=TrackName&sortDescending=false&q=&album=&genre=
     // Public track listing — paged read straight from SQL. Unauthenticated, like GET api/track/{id}.
+    // q/album/genre build an optional TrackFilter; all null → null passthrough (no filtering).
     [HttpGet("page")]
     public async Task<ActionResult> GetPage(
         [FromQuery] int page = 1,
         [FromQuery] int pageSize = 20,
         [FromQuery] string? sortColumn = null,
         [FromQuery] bool sortDescending = false,
+        [FromQuery] string? q = null,
+        [FromQuery] string? album = null,
+        [FromQuery] string? genre = null,
         CancellationToken cancellationToken = default)
     {
-        var result = await _sqlTrackService.GetPaged(page, pageSize, sortColumn, sortDescending, cancellationToken);
+        var filter = new TrackFilter { SearchText = q, Album = album, Genre = genre };
+        var effectiveFilter = filter.IsEmpty ? null : filter;
+
+        var result = await _sqlTrackService.GetPaged(page, pageSize, sortColumn, sortDescending, effectiveFilter, cancellationToken);
         if (!result.Success || result.Value is null)
         {
             var error = result.Messages.FirstOrDefault()?.Message ?? "Unknown error";
@@ -68,6 +75,40 @@ public class TrackController : ControllerBase
         return Ok(result.Value);
     }
 
+    // GET api/track/albums (unauthenticated)
+    // Distinct non-null albums with track counts and cover keys. Public browse data, same posture as
+    // GET api/track/page. Literal segment, declared before the parameterized "{trackId}" route.
+    [HttpGet("albums")]
+    public async Task<ActionResult> GetAlbums(CancellationToken ct = default)
+    {
+        var result = await _sqlTrackService.GetDistinctAlbums(ct);
+        if (!result.Success || result.Value is null)
+        {
+            var error = result.Messages.FirstOrDefault()?.Message ?? "Unknown error";
+            _logger.LogError("GetAlbums failed: {Error}", error);
+            return StatusCode(500, "Failed to load albums");
+        }
+
+        return Ok(result.Value);
+    }
+
+    // GET api/track/genres (unauthenticated)
+    // Distinct non-null genres with track counts. Public browse data, same posture as GET
+    // api/track/page. Literal segment, declared before the parameterized "{trackId}" route.
+    [HttpGet("genres")]
+    public async Task<ActionResult> GetGenres(CancellationToken ct = default)
+    {
+        var result = await _sqlTrackService.GetDistinctGenres(ct);
+        if (!result.Success || result.Value is null)
+        {
+            var error = result.Messages.FirstOrDefault()?.Message ?? "Unknown error";
+            _logger.LogError("GetGenres failed: {Error}", error);
+            return StatusCode(500, "Failed to load genres");
+        }
+
+        return Ok(result.Value);
+    }
+
     // GET api/track/random (unauthenticated)
     // Picks one track at random from the full library and returns its metadata. Public, same auth
     // posture as GET api/track/page. Selection math lives in the SQL service/repository, not here.

DeepDrftData/ITrackService.cs

@@ -20,7 +20,14 @@ public interface ITrackService
     /// </summary>
     Task<ResultContainer<TrackDto?>> GetRandom(CancellationToken cancellationToken = default);
     Task<ResultContainer<List<TrackDto>>> GetAll();
-    Task<ResultContainer<PagedResult<TrackDto>>> GetPaged(int pageNumber, int pageSize, string? sortColumn, bool sortDescending, CancellationToken cancellationToken = default);
+    Task<ResultContainer<PagedResult<TrackDto>>> GetPaged(int pageNumber, int pageSize, string? sortColumn, bool sortDescending, TrackFilter? filter = null, CancellationToken cancellationToken = default);
+
+    /// <summary>Distinct non-null albums with track counts and a representative cover key, album-ascending.</summary>
+    Task<ResultContainer<List<AlbumSummaryDto>>> GetDistinctAlbums(CancellationToken cancellationToken = default);
+
+    /// <summary>Distinct non-null genres with track counts, genre-ascending.</summary>
+    Task<ResultContainer<List<GenreSummaryDto>>> GetDistinctGenres(CancellationToken cancellationToken = default);
+
     Task<ResultContainer<TrackDto>> Create(TrackDto newTrack);
     Task<ResultContainer<TrackDto>> Update(TrackDto track);
     Task<Result> Delete(long id);

DeepDrftData/Repositories/TrackRepository.cs

@@ -1,9 +1,11 @@
 using Data.Data.Repositories;
 using Data.Errors;
 using DeepDrftData.Data;
+using DeepDrftModels.DTOs;
 using DeepDrftModels.Entities;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
+using Models.Common;
 
 namespace DeepDrftData.Repositories;
 
@@ -44,6 +46,94 @@ public class TrackRepository : Repository<DeepDrftContext, TrackEntity>
             .FirstOrDefaultAsync(cancellationToken);
     }
 
+    // Paged query with optional filter predicates. Built directly off the DbSet rather than the
+    // base GetPagedAsync(paging) overload, which takes no where-clause. The OrderBy expression and
+    // direction ride in on the PagingParameters the manager already built, so sort + filter +
+    // pagination compose. Filter predicates apply before sort and Skip/Take so TotalCount reflects
+    // the filtered set.
+    public async Task<PagedResult<TrackEntity>> GetPagedFilteredAsync(
+        PagingParameters<TrackEntity> paging,
+        TrackFilter? filter,
+        CancellationToken ct = default)
+    {
+        IQueryable<TrackEntity> query = _context.Tracks;
+
+        if (filter is not null)
+        {
+            if (!string.IsNullOrWhiteSpace(filter.SearchText))
+            {
+                // Postgres case-insensitive LIKE. The '%' wraps make it a contains-match; ILike is
+                // EF-translatable where ToLower().Contains() is not. Album is nullable — ILike on a
+                // null column yields false, which is the desired "no match" behaviour.
+                var pattern = $"%{filter.SearchText}%";
+                query = query.Where(t =>
+                    EF.Functions.ILike(t.TrackName, pattern)
+                    || EF.Functions.ILike(t.Artist, pattern)
+                    || (t.Album != null && EF.Functions.ILike(t.Album, pattern)));
+            }
+
+            if (!string.IsNullOrWhiteSpace(filter.Album))
+                query = query.Where(t => t.Album == filter.Album);
+
+            if (!string.IsNullOrWhiteSpace(filter.Genre))
+                query = query.Where(t => t.Genre == filter.Genre);
+        }
+
+        var totalCount = await query.CountAsync(ct);
+
+        if (paging.OrderBy is not null)
+        {
+            query = paging.IsDescending
+                ? query.OrderByDescending(paging.OrderBy)
+                : query.OrderBy(paging.OrderBy);
+        }
+
+        var items = await query
+            .Skip(paging.Skip)
+            .Take(paging.PageSize)
+            .ToListAsync(ct);
+
+        return new PagedResult<TrackEntity>
+        {
+            Items = items,
+            TotalCount = totalCount,
+            Page = paging.Page,
+            PageSize = paging.PageSize,
+        };
+    }
+
+    // Distinct albums (non-null) with track counts and a representative cover key. The cover is the
+    // first non-null ImagePath in the group; GroupBy + projection keeps it a single round-trip.
+    public async Task<List<AlbumSummaryDto>> GetDistinctAlbumsAsync(CancellationToken ct = default)
+        => await _context.Tracks
+            .Where(t => t.Album != null)
+            .GroupBy(t => t.Album!)
+            .Select(g => new AlbumSummaryDto
+            {
+                Album = g.Key,
+                TrackCount = g.Count(),
+                CoverImageKey = g
+                    .Where(t => t.ImagePath != null)
+                    .OrderBy(t => t.Id)
+                    .Select(t => t.ImagePath)
+                    .FirstOrDefault(),
+            })
+            .OrderBy(a => a.Album)
+            .ToListAsync(ct);
+
+    // Distinct genres (non-null) with track counts.
+    public async Task<List<GenreSummaryDto>> GetDistinctGenresAsync(CancellationToken ct = default)
+        => await _context.Tracks
+            .Where(t => t.Genre != null)
+            .GroupBy(t => t.Genre!)
+            .Select(g => new GenreSummaryDto
+            {
+                Genre = g.Key,
+                TrackCount = g.Count(),
+            })
+            .OrderBy(g => g.Genre)
+            .ToListAsync(ct);
+
     protected override void UpdateEntity(TrackEntity target, TrackEntity source)
     {
         base.UpdateEntity(target, source); // copies CreatedAt, UpdatedAt, IsDeleted

DeepDrftData/TrackManager.cs

@@ -97,6 +97,7 @@ public class TrackManager
         int pageSize,
         string? sortColumn,
         bool sortDescending,
+        TrackFilter? filter = null,
         CancellationToken cancellationToken = default)
     {
         try
@@ -117,7 +118,14 @@ public class TrackManager
                 }
             };
 
-            var page = await Repository.GetPagedAsync(parameters);
+            // An all-null filter must produce identical results to no filter, so collapse it to
+            // null and take the unfiltered base path (preserves backward compatibility).
+            var effectiveFilter = filter is null || filter.IsEmpty ? null : filter;
+
+            var page = effectiveFilter is null
+                ? await Repository.GetPagedAsync(parameters)
+                : await Repository.GetPagedFilteredAsync(parameters, effectiveFilter, cancellationToken);
+
             var dtoPage = PagedResult<TrackDto>.From(page, page.Items.Select(TrackConverter.Convert));
             return ResultContainer<PagedResult<TrackDto>>.CreatePassResult(dtoPage);
         }
@@ -127,6 +135,32 @@ public class TrackManager
         }
     }
 
+    public async Task<ResultContainer<List<AlbumSummaryDto>>> GetDistinctAlbums(CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            var albums = await Repository.GetDistinctAlbumsAsync(cancellationToken);
+            return ResultContainer<List<AlbumSummaryDto>>.CreatePassResult(albums);
+        }
+        catch (Exception e)
+        {
+            return ResultContainer<List<AlbumSummaryDto>>.CreateFailResult(e.Message);
+        }
+    }
+
+    public async Task<ResultContainer<List<GenreSummaryDto>>> GetDistinctGenres(CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            var genres = await Repository.GetDistinctGenresAsync(cancellationToken);
+            return ResultContainer<List<GenreSummaryDto>>.CreatePassResult(genres);
+        }
+        catch (Exception e)
+        {
+            return ResultContainer<List<GenreSummaryDto>>.CreateFailResult(e.Message);
+        }
+    }
+
     public async Task<ResultContainer<TrackDto>> Create(TrackDto newTrack)
     {
         try

DeepDrftModels/DTOs/AlbumSummaryDto.cs

@@ -0,0 +1,14 @@
+namespace DeepDrftModels.DTOs;
+
+/// <summary>
+/// One distinct album with its track count and a representative cover image key. Backs the
+/// /albums browse grid.
+/// </summary>
+public class AlbumSummaryDto
+{
+    public required string Album { get; set; }
+    public int TrackCount { get; set; }
+
+    /// <summary>ImagePath of the first track in the album that has one; null when none do.</summary>
+    public string? CoverImageKey { get; set; }
+}

DeepDrftModels/DTOs/GenreSummaryDto.cs

@@ -0,0 +1,8 @@
+namespace DeepDrftModels.DTOs;
+
+/// <summary>One distinct genre with its track count. Backs the /genres browse list.</summary>
+public class GenreSummaryDto
+{
+    public required string Genre { get; set; }
+    public int TrackCount { get; set; }
+}

DeepDrftModels/DTOs/TrackFilter.cs

@@ -0,0 +1,27 @@
+namespace DeepDrftModels.DTOs;
+
+/// <summary>
+/// Cross-project track filter contract. Threaded alongside (never inside) the external
+/// <c>PagingParameters&lt;T&gt;</c>, which cannot carry a where-clause. An instance with all
+/// properties null is equivalent to no filter — see <c>TrackFilter.IsEmpty</c>.
+/// </summary>
+public class TrackFilter
+{
+    /// <summary>Free-text, case-insensitive LIKE across TrackName, Artist, and Album.</summary>
+    public string? SearchText { get; set; }
+
+    /// <summary>Exact album match.</summary>
+    public string? Album { get; set; }
+
+    /// <summary>Exact genre match.</summary>
+    public string? Genre { get; set; }
+
+    /// <summary>
+    /// True when no predicate is set. An empty filter must produce identical results to a null
+    /// filter, so callers collapse it to null before querying.
+    /// </summary>
+    public bool IsEmpty =>
+        string.IsNullOrWhiteSpace(SearchText)
+        && string.IsNullOrWhiteSpace(Album)
+        && string.IsNullOrWhiteSpace(Genre);
+}

DeepDrftPublic.Client/Clients/TrackClient.cs

@@ -20,7 +20,10 @@ public class TrackClient
         int pageNumber,
         int pageSize,
         string? sortColumn = null,
-        bool sortDescending = false)
+        bool sortDescending = false,
+        string? searchText = null,
+        string? album = null,
+        string? genre = null)
     {
         var queryArgs = new Dictionary<string, string?>(){
             ["page"] = pageNumber.ToString(),
@@ -33,6 +36,15 @@ public class TrackClient
         if (sortDescending)
             queryArgs["sortDescending"] = "true";
 
+        if (!string.IsNullOrEmpty(searchText))
+            queryArgs["q"] = searchText;
+
+        if (!string.IsNullOrEmpty(album))
+            queryArgs["album"] = album;
+
+        if (!string.IsNullOrEmpty(genre))
+            queryArgs["genre"] = genre;
+
         string query = QueryString.Create(queryArgs).ToString();
 
         var response = await _http.GetAsync($"api/track/page{query}");
@@ -77,6 +89,42 @@ public class TrackClient
             : ApiResult<TrackDto?>.CreateFailResult("Failed to deserialize response");
     }
 
+    public async Task<ApiResult<List<AlbumSummaryDto>>> GetAlbums()
+    {
+        var response = await _http.GetAsync("api/track/albums");
+
+        if (!response.IsSuccessStatusCode)
+            return ApiResult<List<AlbumSummaryDto>>.CreateFailResult($"HTTP {(int)response.StatusCode}");
+
+        var json = await response.Content.ReadAsStringAsync();
+        var albums = JsonSerializer.Deserialize<List<AlbumSummaryDto>>(json, new JsonSerializerOptions
+        {
+            PropertyNameCaseInsensitive = true
+        });
+
+        return albums is not null
+            ? ApiResult<List<AlbumSummaryDto>>.CreatePassResult(albums)
+            : ApiResult<List<AlbumSummaryDto>>.CreateFailResult("Failed to deserialize response");
+    }
+
+    public async Task<ApiResult<List<GenreSummaryDto>>> GetGenres()
+    {
+        var response = await _http.GetAsync("api/track/genres");
+
+        if (!response.IsSuccessStatusCode)
+            return ApiResult<List<GenreSummaryDto>>.CreateFailResult($"HTTP {(int)response.StatusCode}");
+
+        var json = await response.Content.ReadAsStringAsync();
+        var genres = JsonSerializer.Deserialize<List<GenreSummaryDto>>(json, new JsonSerializerOptions
+        {
+            PropertyNameCaseInsensitive = true
+        });
+
+        return genres is not null
+            ? ApiResult<List<GenreSummaryDto>>.CreatePassResult(genres)
+            : ApiResult<List<GenreSummaryDto>>.CreateFailResult("Failed to deserialize response");
+    }
+
     public async Task<ApiResult<TrackDto>> GetTrack(string entryKey)
     {
         var response = await _http.GetAsync($"api/track/meta/by-key/{Uri.EscapeDataString(entryKey)}");

DeepDrftPublic.Client/Layout/Pages.cs

@@ -13,9 +13,11 @@ public static class Pages
 {
     public static readonly List<PageRoute> MenuPages =
     [
-        new() { Name = "Releases",   Route = "/tracks",   Icon = Icons.Material.Filled.LibraryMusic },
+        new() { Name = "Releases", Route = "/tracks", Icon = Icons.Material.Filled.LibraryMusic },
-        new() { Name = "Sessions", Route = "#",         Icon = Icons.Material.Filled.Piano },          // TODO: placeholder until Sessions ships
+        new() { Name = "Albums",   Route = "/albums", Icon = Icons.Material.Filled.Album },
-        new() { Name = "Mixes",  Route = "#",         Icon = Icons.Material.Filled.Album },     // TODO: placeholder until Mixes ships
+        new() { Name = "Genres",   Route = "/genres", Icon = Icons.Material.Filled.Category },
+        new() { Name = "Sessions", Route = "#",       Icon = Icons.Material.Filled.Piano },     // TODO: placeholder until Sessions ships
+        new() { Name = "Mixes",    Route = "#",       Icon = Icons.Material.Filled.Album },      // TODO: placeholder until Mixes ships
     ];
 
     public static readonly List<PageRoute> AllPages = 

DeepDrftPublic.Client/Pages/AlbumsView.razor

@@ -0,0 +1,63 @@
+@page "/albums"
+
+<PageTitle>DeepDrft Albums</PageTitle>
+
+<div>
+    <MudContainer MaxWidth="MaxWidth.Large" Class="albums-view-container">
+        @if (_loading)
+        {
+            <MudGrid Spacing="6" Justify="Justify.Center">
+                @foreach (var _ in Enumerable.Range(0, 8))
+                {
+                    <MudItem xs="12" sm="6" md="4" lg="3" xl="3">
+                        <div class="album-card-center">
+                            <MudSkeleton Width="200px" Height="200px" SkeletonType="SkeletonType.Rectangle"/>
+                        </div>
+                    </MudItem>
+                }
+            </MudGrid>
+        }
+        else if (_albums.Count == 0)
+        {
+            <div class="albums-empty">
+                <MudText Typo="Typo.h6">No albums yet</MudText>
+            </div>
+        }
+        else
+        {
+            <MudGrid Spacing="6" Justify="Justify.Center">
+                @foreach (var album in _albums)
+                {
+                    <MudItem xs="12" sm="6" md="4" lg="3" xl="3">
+                        <div class="album-card-center">
+                            <div class="album-card"
+                                 role="button"
+                                 tabindex="0"
+                                 @onclick="@(() => OpenAlbum(album.Album))">
+                                @if (!string.IsNullOrEmpty(album.CoverImageKey))
+                                {
+                                    <div class="album-card-cover"
+                                         style="background-image: url('api/image/@Uri.EscapeDataString(album.CoverImageKey)');">
+                                    </div>
+                                }
+                                else
+                                {
+                                    <div class="album-card-cover album-card-cover--fallback"></div>
+                                }
+
+                                <div class="album-card-body">
+                                    <MudText Typo="Typo.subtitle1" Class="album-card-title text-truncate">
+                                        @album.Album
+                                    </MudText>
+                                    <MudText Typo="Typo.caption" Class="album-card-count">
+                                        @album.TrackCount @(album.TrackCount == 1 ? "track" : "tracks")
+                                    </MudText>
+                                </div>
+                            </div>
+                        </div>
+                    </MudItem>
+                }
+            </MudGrid>
+        }
+    </MudContainer>
+</div>

DeepDrftPublic.Client/Pages/AlbumsView.razor.cs

@@ -0,0 +1,26 @@
+using DeepDrftModels.DTOs;
+using DeepDrftPublic.Client.Services;
+using Microsoft.AspNetCore.Components;
+
+namespace DeepDrftPublic.Client.Pages;
+
+public partial class AlbumsView : ComponentBase
+{
+    [Inject] public required ITrackDataService TrackData { get; set; }
+    [Inject] public required NavigationManager Navigation { get; set; }
+
+    private bool _loading = true;
+    private List<AlbumSummaryDto> _albums = [];
+
+    protected override async Task OnInitializedAsync()
+    {
+        var result = await TrackData.GetAlbums();
+        if (result is { Success: true, Value: { } albums })
+            _albums = albums;
+
+        _loading = false;
+    }
+
+    private void OpenAlbum(string album)
+        => Navigation.NavigateTo($"/tracks?album={Uri.EscapeDataString(album)}");
+}

DeepDrftPublic.Client/Pages/AlbumsView.razor.css

@@ -0,0 +1,58 @@
+.albums-view-container {
+    padding-top: 16px;
+}
+
+.album-card-center {
+    display: flex;
+    justify-content: center;
+    width: 100%;
+}
+
+.album-card {
+    display: flex;
+    flex-direction: column;
+    width: 200px;
+    cursor: pointer;
+    border-radius: 8px;
+    overflow: hidden;
+    transition: transform 120ms ease;
+}
+
+.album-card:hover {
+    transform: translateY(-4px);
+}
+
+.album-card-cover {
+    width: 200px;
+    height: 200px;
+    background-size: cover;
+    background-position: center;
+    background-repeat: no-repeat;
+}
+
+.album-card-cover--fallback {
+    background-color: var(--mud-palette-dark, #1a2238);
+}
+
+.album-card-body {
+    padding: 8px 4px 0 4px;
+    display: flex;
+    flex-direction: column;
+    gap: 2px;
+}
+
+/* album-card-title / album-card-count ride on MudText, a child Razor component whose
+   root Blazor isolation does not scope-stamp; ::deep pierces into its output. */
+::deep .album-card-title {
+    font-weight: 600;
+}
+
+::deep .album-card-count {
+    opacity: 0.7;
+}
+
+.albums-empty {
+    display: flex;
+    justify-content: center;
+    padding: 48px 0;
+}

DeepDrftPublic.Client/Pages/GenresView.razor

@@ -0,0 +1,41 @@
+@page "/genres"
+
+<PageTitle>DeepDrft Genres</PageTitle>
+
+<div>
+    <MudContainer MaxWidth="MaxWidth.Medium" Class="genres-view-container">
+        @if (_loading)
+        {
+            <div class="genres-list">
+                @foreach (var _ in Enumerable.Range(0, 8))
+                {
+                    <MudSkeleton Height="48px" Width="100%" Class="mb-2"/>
+                }
+            </div>
+        }
+        else if (_genres.Count == 0)
+        {
+            <div class="genres-empty">
+                <MudText Typo="Typo.h6">No genres yet</MudText>
+            </div>
+        }
+        else
+        {
+            <MudList T="string" Class="genres-list">
+                @foreach (var genre in _genres)
+                {
+                    <MudListItem T="string"
+                                 Icon="@Icons.Material.Filled.Category"
+                                 OnClick="@(() => OpenGenre(genre.Genre))">
+                        <div class="genre-row">
+                            <MudText Typo="Typo.subtitle1">@genre.Genre</MudText>
+                            <MudText Typo="Typo.caption" Class="genre-count">
+                                @genre.TrackCount @(genre.TrackCount == 1 ? "track" : "tracks")
+                            </MudText>
+                        </div>
+                    </MudListItem>
+                }
+            </MudList>
+        }
+    </MudContainer>
+</div>

DeepDrftPublic.Client/Pages/GenresView.razor.cs

@@ -0,0 +1,26 @@
+using DeepDrftModels.DTOs;
+using DeepDrftPublic.Client.Services;
+using Microsoft.AspNetCore.Components;
+
+namespace DeepDrftPublic.Client.Pages;
+
+public partial class GenresView : ComponentBase
+{
+    [Inject] public required ITrackDataService TrackData { get; set; }
+    [Inject] public required NavigationManager Navigation { get; set; }
+
+    private bool _loading = true;
+    private List<GenreSummaryDto> _genres = [];
+
+    protected override async Task OnInitializedAsync()
+    {
+        var result = await TrackData.GetGenres();
+        if (result is { Success: true, Value: { } genres })
+            _genres = genres;
+
+        _loading = false;
+    }
+
+    private void OpenGenre(string genre)
+        => Navigation.NavigateTo($"/tracks?genre={Uri.EscapeDataString(genre)}");
+}

DeepDrftPublic.Client/Pages/GenresView.razor.css

@@ -0,0 +1,28 @@
+.genres-view-container {
+    padding-top: 16px;
+}
+
+/* genres-list rides on MudList, a child Razor component whose root Blazor isolation
+   does not scope-stamp; ::deep is required. */
+::deep .genres-list {
+    width: 100%;
+}
+
+.genre-row {
+    display: flex;
+    align-items: baseline;
+    justify-content: space-between;
+    gap: 16px;
+    width: 100%;
+}
+
+/* genre-count rides on MudText (child Razor component); ::deep pierces into its output. */
+::deep .genre-count {
+    opacity: 0.7;
+}
+
+.genres-empty {
+    display: flex;
+    justify-content: center;
+    padding: 48px 0;
+}

DeepDrftPublic.Client/Pages/TracksView.razor

@@ -5,6 +5,41 @@
 
 <div>
     <div class="tracks-view-container">
+        @* Search + filter affordances are interactive-only: the debounce timer and pill clear
+           need WASM. During prerender/non-interactive they are hidden, matching the view-mode
+           toggle's interactivity gate. *@
+        @if (RendererInfo.IsInteractive)
+        {
+            <div class="tracks-search-row">
+                <MudTextField T="string"
+                              Value="@ViewModel.SearchText"
+                              ValueChanged="@OnSearchInput"
+                              Immediate="true"
+                              DebounceInterval="400"
+                              Placeholder="Search tracks, artists, albums"
+                              Adornment="Adornment.Start"
+                              AdornmentIcon="@Icons.Material.Filled.Search"
+                              Variant="Variant.Outlined"
+                              Margin="Margin.Dense"
+                              Clearable="true"
+                              Class="tracks-search-field"/>
+            </div>
+
+            @if (ViewModel.FilterAlbum is not null || ViewModel.FilterGenre is not null)
+            {
+                <div class="tracks-filter-pills">
+                    <MudChip T="string"
+                             Color="Color.Tertiary"
+                             Variant="Variant.Filled"
+                             OnClose="@(_ => ClearFilter())">
+                        @(ViewModel.FilterAlbum is not null
+                            ? $"Album: {ViewModel.FilterAlbum}"
+                            : $"Genre: {ViewModel.FilterGenre}")
+                    </MudChip>
+                </div>
+            }
+        }
+
         @if (ViewModel.Page != null)
         {
             <div class="tracks-view-header">

DeepDrftPublic.Client/Pages/TracksView.razor.cs

@@ -13,8 +13,15 @@ public partial class TracksView : ComponentBase, IDisposable
 
     [Inject] public required TracksViewModel ViewModel { get; set; }
     [Inject] public required PersistentComponentState PersistentState { get; set; }
+    [Inject] public required NavigationManager Navigation { get; set; }
     [CascadingParameter] public required IStreamingPlayerService PlayerService { get; set; }
 
+    // Filter params arrive on the URL: /tracks?album=X, /tracks?genre=Y, /tracks?q=Z. Copied into
+    // the ViewModel on init before the first fetch so the gallery renders filtered on direct nav.
+    [SupplyParameterFromQuery(Name = "album")] public string? AlbumQuery { get; set; }
+    [SupplyParameterFromQuery(Name = "genre")] public string? GenreQuery { get; set; }
+    [SupplyParameterFromQuery(Name = "q")] public string? SearchQuery { get; set; }
+
     private IStreamingPlayerService? _subscribedService;
     private PersistingComponentStateSubscription _persistingSubscription;
 
@@ -23,6 +30,11 @@ public partial class TracksView : ComponentBase, IDisposable
 
     protected override async Task OnInitializedAsync()
     {
+        // Seed filter state from the URL before any fetch or restore decision.
+        ViewModel.FilterAlbum = string.IsNullOrWhiteSpace(AlbumQuery) ? null : AlbumQuery;
+        ViewModel.FilterGenre = string.IsNullOrWhiteSpace(GenreQuery) ? null : GenreQuery;
+        ViewModel.SearchText = string.IsNullOrWhiteSpace(SearchQuery) ? null : SearchQuery;
+
         // Carry the prerendered page across the prerender -> interactive (WASM) seam.
         // Without this, the WASM pass gets a fresh scoped ViewModel (Page == null),
         // re-renders the skeleton, re-fetches, and replaces the gallery DOM a few
@@ -31,7 +43,11 @@ public partial class TracksView : ComponentBase, IDisposable
         // restore on the interactive pass, and only fetch on a miss.
         _persistingSubscription = PersistentState.RegisterOnPersisting(PersistTracks);
 
-        if (PersistentState.TryTakeFromJson<PagedResult<TrackDto>>(PersistKey, out var restored) && restored is not null)
+        // The prerendered page is always unfiltered. When the URL carries filter params, that
+        // restored page is wrong for this view — skip the restore and fetch with the filter.
+        if (!ViewModel.HasActiveFilter
+            && PersistentState.TryTakeFromJson<PagedResult<TrackDto>>(PersistKey, out var restored)
+            && restored is not null)
         {
             ViewModel.Page = restored;
             ViewModel.PageNumber = restored.Page;
@@ -63,7 +79,9 @@ public partial class TracksView : ComponentBase, IDisposable
 
     private Task PersistTracks()
     {
-        if (ViewModel.Page is not null)
+        // Only persist the unfiltered page. A filtered page restored onto a later plain /tracks
+        // visit would show the wrong results, so a filtered render leaves the cache untouched.
+        if (ViewModel.Page is not null && !ViewModel.HasActiveFilter)
         {
             PersistentState.PersistAsJson(PersistKey, ViewModel.Page);
         }
@@ -72,7 +90,9 @@ public partial class TracksView : ComponentBase, IDisposable
 
     private async Task SetPage(int newPage)
     {
-        var result = await ViewModel.TrackData.GetPage(newPage, ViewModel.PageSize, ViewModel.SortBy, ViewModel.IsDescending);
+        var result = await ViewModel.TrackData.GetPage(
+            newPage, ViewModel.PageSize, ViewModel.SortBy, ViewModel.IsDescending,
+            ViewModel.SearchText, ViewModel.FilterAlbum, ViewModel.FilterGenre);
 
         if (result is { Success: true, Value: PagedResult<TrackDto> pageResult })
         {
@@ -81,6 +101,34 @@ public partial class TracksView : ComponentBase, IDisposable
         }
     }
 
+    // Fired by MudTextField after its 400ms DebounceInterval, so only the trailing keystroke in a
+    // burst reaches here. Resets to page 1 since the result set changes, then re-fetches with the
+    // active filter (search + any album/genre pill compose).
+    private async Task OnSearchInput(string? value)
+    {
+        ViewModel.SearchText = string.IsNullOrWhiteSpace(value) ? null : value;
+        ViewModel.PageNumber = 1;
+        await SetPage(1);
+        StateHasChanged();
+    }
+
+    // Clears the album/genre pill and returns to the unfiltered gallery. Updates the URL (drops the
+    // query param) and re-fetches in place. SearchText is intentionally left intact — the pill only
+    // represents FilterAlbum/FilterGenre, not free-text search, so clearing it must not discard an
+    // active search term. Blazor reuses the component on a same-route query change and does not
+    // re-run OnInitializedAsync, so the state reset + refetch happen here explicitly rather than
+    // relying on re-init.
+    private async Task ClearFilter()
+    {
+        ViewModel.FilterAlbum = null;
+        ViewModel.FilterGenre = null;
+        ViewModel.PageNumber = 1;
+
+        Navigation.NavigateTo("/tracks");
+        await SetPage(1);
+        StateHasChanged();
+    }
+
     private async Task PlayTrack(TrackDto track)
     {
         // Resume the current track if it's merely paused; otherwise stream the new selection.

DeepDrftPublic.Client/Pages/TracksView.razor.css

@@ -24,3 +24,22 @@
     justify-content: flex-end;
     padding: 0 0 12px 0;
 }
+
+.tracks-search-row {
+    display: flex;
+    justify-content: flex-start;
+    padding: 0 0 12px 0;
+}
+
+/* tracks-search-field rides on MudTextField, whose root is a child Razor component element.
+   Blazor isolation does not stamp the scope attribute there, so ::deep is required. */
+::deep .tracks-search-field {
+    max-width: 420px;
+    width: 100%;
+}
+
+.tracks-filter-pills {
+    display: flex;
+    justify-content: flex-start;
+    padding: 0 0 12px 0;
+}

DeepDrftPublic.Client/Services/ITrackDataService.cs

@@ -16,7 +16,16 @@ public interface ITrackDataService
         int pageNumber,
         int pageSize,
         string? sortColumn = null,
-        bool sortDescending = false);
+        bool sortDescending = false,
+        string? searchText = null,
+        string? album = null,
+        string? genre = null);
+
+    /// <summary>Distinct non-null albums with track counts and a representative cover key.</summary>
+    Task<ApiResult<List<AlbumSummaryDto>>> GetAlbums();
+
+    /// <summary>Distinct non-null genres with track counts.</summary>
+    Task<ApiResult<List<GenreSummaryDto>>> GetGenres();
 
     Task<ApiResult<TrackDto>> GetTrack(string trackId);
 

DeepDrftPublic.Client/Services/TrackClientDataService.cs

@@ -23,8 +23,17 @@ public class TrackClientDataService : ITrackDataService
         int pageNumber,
         int pageSize,
         string? sortColumn = null,
-        bool sortDescending = false)
+        bool sortDescending = false,
-        => _trackClient.GetPage(pageNumber, pageSize, sortColumn, sortDescending);
+        string? searchText = null,
+        string? album = null,
+        string? genre = null)
+        => _trackClient.GetPage(pageNumber, pageSize, sortColumn, sortDescending, searchText, album, genre);
+
+    public Task<ApiResult<List<AlbumSummaryDto>>> GetAlbums()
+        => _trackClient.GetAlbums();
+
+    public Task<ApiResult<List<GenreSummaryDto>>> GetGenres()
+        => _trackClient.GetGenres();
 
     public Task<ApiResult<TrackDto>> GetTrack(string trackId)
         => _trackClient.GetTrack(trackId);

DeepDrftPublic.Client/ViewModels/TracksViewModel.cs

@@ -26,6 +26,18 @@ public class TracksViewModel
     public bool IsDescending { get; set; } = false;
     public PagedResult<TrackDto>? Page { get; set; } = null;
 
+    // Active gallery filters. Null/empty means "no filter on this dimension". SearchText is the
+    // free-text query; FilterAlbum/FilterGenre are exact-match pills driven by the /albums and
+    // /genres pages via query-string navigation.
+    public string? SearchText { get; set; }
+    public string? FilterAlbum { get; set; }
+    public string? FilterGenre { get; set; }
+
+    public bool HasActiveFilter =>
+        !string.IsNullOrWhiteSpace(SearchText)
+        || !string.IsNullOrWhiteSpace(FilterAlbum)
+        || !string.IsNullOrWhiteSpace(FilterGenre);
+
     public TracksViewModel(ITrackDataService trackData)
     {
         TrackData = trackData;

DeepDrftPublic/Controllers/TrackProxyController.cs

@@ -22,18 +22,27 @@ public class TrackProxyController : ControllerBase
         _logger = logger;
     }
 
-    /// <summary>Proxies paged track metadata from DeepDrftAPI.</summary>
+    /// <summary>Proxies paged track metadata from DeepDrftAPI, forwarding optional filter params.</summary>
     [HttpGet("page")]
     public async Task<ActionResult> GetPage(
         [FromQuery] int page = 1,
         [FromQuery] int pageSize = 20,
         [FromQuery] string? sortColumn = null,
         [FromQuery] bool sortDescending = false,
+        [FromQuery] string? q = null,
+        [FromQuery] string? album = null,
+        [FromQuery] string? genre = null,
         CancellationToken ct = default)
     {
         var query = $"api/track/page?page={page}&pageSize={pageSize}&sortDescending={sortDescending}";
         if (!string.IsNullOrWhiteSpace(sortColumn))
             query += $"&sortColumn={Uri.EscapeDataString(sortColumn)}";
+        if (!string.IsNullOrWhiteSpace(q))
+            query += $"&q={Uri.EscapeDataString(q)}";
+        if (!string.IsNullOrWhiteSpace(album))
+            query += $"&album={Uri.EscapeDataString(album)}";
+        if (!string.IsNullOrWhiteSpace(genre))
+            query += $"&genre={Uri.EscapeDataString(genre)}";
 
         HttpResponseMessage upstream;
         try
@@ -92,6 +101,70 @@ public class TrackProxyController : ControllerBase
         }
     }
 
+    /// <summary>
+    /// Proxies the distinct-albums browse list from DeepDrftAPI. Unauthenticated, same posture as
+    /// the paged listing. Small JSON, buffered and relayed. Literal segment, declared before the
+    /// parameterized "{trackId}" route so it is never treated as a trackId.
+    /// </summary>
+    [HttpGet("albums")]
+    public async Task<ActionResult> GetAlbums(CancellationToken ct = default)
+    {
+        HttpResponseMessage upstream;
+        try
+        {
+            upstream = await _upstream.GetAsync("api/track/albums", HttpCompletionOption.ResponseHeadersRead, ct);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Upstream call to DeepDrftAPI track/albums failed");
+            return StatusCode(502, "Upstream unavailable");
+        }
+
+        using (upstream)
+        {
+            if (!upstream.IsSuccessStatusCode)
+            {
+                _logger.LogWarning("DeepDrftAPI track/albums returned {Status}", (int)upstream.StatusCode);
+                return StatusCode((int)upstream.StatusCode);
+            }
+
+            var json = await upstream.Content.ReadAsStringAsync(ct);
+            return Content(json, "application/json");
+        }
+    }
+
+    /// <summary>
+    /// Proxies the distinct-genres browse list from DeepDrftAPI. Unauthenticated, same posture as
+    /// the paged listing. Small JSON, buffered and relayed. Literal segment, declared before the
+    /// parameterized "{trackId}" route so it is never treated as a trackId.
+    /// </summary>
+    [HttpGet("genres")]
+    public async Task<ActionResult> GetGenres(CancellationToken ct = default)
+    {
+        HttpResponseMessage upstream;
+        try
+        {
+            upstream = await _upstream.GetAsync("api/track/genres", HttpCompletionOption.ResponseHeadersRead, ct);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Upstream call to DeepDrftAPI track/genres failed");
+            return StatusCode(502, "Upstream unavailable");
+        }
+
+        using (upstream)
+        {
+            if (!upstream.IsSuccessStatusCode)
+            {
+                _logger.LogWarning("DeepDrftAPI track/genres returned {Status}", (int)upstream.StatusCode);
+                return StatusCode((int)upstream.StatusCode);
+            }
+
+            var json = await upstream.Content.ReadAsStringAsync(ct);
+            return Content(json, "application/json");
+        }
+    }
+
     /// <summary>
     /// Proxies single-track metadata lookup by vault entry key from DeepDrftAPI. Unauthenticated,
     /// same posture as the paged listing. Small JSON, so it is buffered and relayed; a 404 from

DeepDrftTests/DeepDrftTests.csproj

@@ -13,6 +13,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="10.0.7" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
     <PackageReference Include="NUnit" Version="4.4.0" />
     <PackageReference Include="NUnit.Analyzers" Version="4.11.2">
@@ -28,6 +29,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\DeepDrftContent\DeepDrftContent.csproj" />
+    <ProjectReference Include="..\DeepDrftData\DeepDrftData.csproj" />
   </ItemGroup>
 
 </Project>

DeepDrftTests/TrackFilterQueryTests.cs

@@ -0,0 +1,205 @@
+using Data.Data.Repositories;
+using DeepDrftData.Data;
+using DeepDrftData.Repositories;
+using DeepDrftModels.DTOs;
+using DeepDrftModels.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging.Abstractions;
+using Models.Common;
+
+namespace DeepDrftTests;
+
+/// <summary>
+/// Query-shape tests for the Phase 2.2/2.3 filter and distinct-browse repository methods.
+///
+/// Provider note: these run on the EF in-memory provider, which executes LINQ in process. That
+/// covers exact-match equality, null passthrough, GroupBy/Count, and ordering — every predicate
+/// in <see cref="TrackRepository.GetPagedFilteredAsync"/> except the free-text branch. That branch
+/// uses <c>EF.Functions.ILike</c>, an Npgsql-only relational function with no in-memory translation,
+/// so the SearchText case is a Postgres integration test gated on a DSN (see SearchText_*). It is
+/// ignored when no test database is configured rather than asserted against a provider that never
+/// runs the predicate.
+/// </summary>
+[TestFixture]
+public class TrackFilterQueryTests
+{
+    private DeepDrftContext _context = null!;
+
+    [SetUp]
+    public void SetUp()
+    {
+        var options = new DbContextOptionsBuilder<DeepDrftContext>()
+            .UseInMemoryDatabase(databaseName: Guid.NewGuid().ToString())
+            .Options;
+        _context = new DeepDrftContext(options);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        _context.Dispose();
+    }
+
+    private TrackRepository CreateRepository()
+        => new(_context, NullLogger<Repository<DeepDrftContext, TrackEntity>>.Instance);
+
+    private static TrackEntity Track(
+        string name, string artist, string? album = null, string? genre = null, string? image = null)
+        => new()
+        {
+            EntryKey = Guid.NewGuid().ToString("N"),
+            TrackName = name,
+            Artist = artist,
+            Album = album,
+            Genre = genre,
+            ImagePath = image,
+        };
+
+    private async Task SeedAsync(params TrackEntity[] tracks)
+    {
+        _context.Tracks.AddRange(tracks);
+        await _context.SaveChangesAsync();
+    }
+
+    private static PagingParameters<TrackEntity> DefaultPaging()
+        => new() { Page = 1, PageSize = 20, OrderBy = t => t.Id, IsDescending = false };
+
+    // Case 2 — exact album match: returns only rows whose Album equals the filter value, and
+    // TotalCount reflects the filtered set, not the table.
+    [Test]
+    public async Task GetPagedFilteredAsync_WithExactAlbum_ReturnsOnlyThatAlbum()
+    {
+        await SeedAsync(
+            Track("One", "A", album: "Blue"),
+            Track("Two", "B", album: "Blue"),
+            Track("Three", "C", album: "Red"),
+            Track("Four", "D", album: null));
+
+        var repo = CreateRepository();
+        var result = await repo.GetPagedFilteredAsync(DefaultPaging(), new TrackFilter { Album = "Blue" });
+
+        Assert.That(result.TotalCount, Is.EqualTo(2));
+        Assert.That(result.Items.Select(t => t.TrackName), Is.EquivalentTo(new[] { "One", "Two" }));
+    }
+
+    // Case 2b — exact genre match composes the same way as album.
+    [Test]
+    public async Task GetPagedFilteredAsync_WithExactGenre_ReturnsOnlyThatGenre()
+    {
+        await SeedAsync(
+            Track("One", "A", genre: "Techno"),
+            Track("Two", "B", genre: "House"),
+            Track("Three", "C", genre: "Techno"));
+
+        var repo = CreateRepository();
+        var result = await repo.GetPagedFilteredAsync(DefaultPaging(), new TrackFilter { Genre = "Techno" });
+
+        Assert.That(result.TotalCount, Is.EqualTo(2));
+        Assert.That(result.Items.Select(t => t.TrackName), Is.EquivalentTo(new[] { "One", "Three" }));
+    }
+
+    // Case 3 — null filter is a passthrough: same items and count as the unfiltered base GetPagedAsync.
+    [Test]
+    public async Task GetPagedFilteredAsync_WithNullFilter_MatchesUnfilteredPagedQuery()
+    {
+        await SeedAsync(
+            Track("One", "A", album: "Blue"),
+            Track("Two", "B", album: "Red"),
+            Track("Three", "C"));
+
+        var repo = CreateRepository();
+        var baseline = await repo.GetPagedAsync(DefaultPaging());
+        var filtered = await repo.GetPagedFilteredAsync(DefaultPaging(), filter: null);
+
+        Assert.That(filtered.TotalCount, Is.EqualTo(baseline.TotalCount));
+        Assert.That(
+            filtered.Items.Select(t => t.Id),
+            Is.EqualTo(baseline.Items.Select(t => t.Id)).AsCollection);
+    }
+
+    // Case 4 — distinct albums: excludes null-album rows, counts per group, and takes the cover from
+    // the first track in the group that has a non-null ImagePath. Ordered by album ascending.
+    [Test]
+    public async Task GetDistinctAlbumsAsync_GroupsCountsAndPicksCover()
+    {
+        await SeedAsync(
+            Track("One", "A", album: "Zephyr", image: null),
+            Track("Two", "A", album: "Zephyr", image: "cover-z"),
+            Track("Three", "B", album: "Aria", image: "cover-a"),
+            Track("Four", "C", album: null, image: "ignored"));
+
+        var repo = CreateRepository();
+        var albums = await repo.GetDistinctAlbumsAsync();
+
+        Assert.That(albums.Select(a => a.Album), Is.EqualTo(new[] { "Aria", "Zephyr" }).AsCollection,
+            "albums sort ascending and the null-album track is excluded");
+
+        var zephyr = albums.Single(a => a.Album == "Zephyr");
+        Assert.That(zephyr.TrackCount, Is.EqualTo(2));
+        Assert.That(zephyr.CoverImageKey, Is.EqualTo("cover-z"),
+            "cover is the first non-null ImagePath in the group");
+
+        var aria = albums.Single(a => a.Album == "Aria");
+        Assert.That(aria.TrackCount, Is.EqualTo(1));
+        Assert.That(aria.CoverImageKey, Is.EqualTo("cover-a"));
+    }
+
+    // Case 5 — distinct genres: excludes null-genre rows, counts per group, ordered genre ascending.
+    [Test]
+    public async Task GetDistinctGenresAsync_GroupsCountsAndExcludesNull()
+    {
+        await SeedAsync(
+            Track("One", "A", genre: "Techno"),
+            Track("Two", "B", genre: "Ambient"),
+            Track("Three", "C", genre: "Techno"),
+            Track("Four", "D", genre: null));
+
+        var repo = CreateRepository();
+        var genres = await repo.GetDistinctGenresAsync();
+
+        Assert.That(genres.Select(g => g.Genre), Is.EqualTo(new[] { "Ambient", "Techno" }).AsCollection,
+            "genres sort ascending and the null-genre track is excluded");
+        Assert.That(genres.Single(g => g.Genre == "Techno").TrackCount, Is.EqualTo(2));
+        Assert.That(genres.Single(g => g.Genre == "Ambient").TrackCount, Is.EqualTo(1));
+    }
+
+    // Case 1 — free-text search across TrackName/Artist/Album, case-insensitive. EF.Functions.ILike
+    // is Npgsql-only and does not translate on the in-memory provider, so this runs only against a
+    // real Postgres database supplied via the DEEPDRFT_TEST_PG environment variable. Without it the
+    // test is ignored rather than asserted against a provider that cannot execute the predicate.
+    [Test]
+    public async Task GetPagedFilteredAsync_WithSearchText_MatchesNameArtistOrAlbumCaseInsensitive()
+    {
+        var dsn = Environment.GetEnvironmentVariable("DEEPDRFT_TEST_PG");
+        if (string.IsNullOrWhiteSpace(dsn))
+            Assert.Ignore("Set DEEPDRFT_TEST_PG to a Postgres connection string to run the ILike search test.");
+
+        var options = new DbContextOptionsBuilder<DeepDrftContext>()
+            .UseNpgsql(dsn)
+            .Options;
+        await using var pg = new DeepDrftContext(options);
+        await pg.Database.EnsureCreatedAsync();
+
+        try
+        {
+            pg.Tracks.AddRange(
+                Track("Jazz Odyssey", "Spinal Tap", album: "Smell the Glove"),
+                Track("Quiet Storm", "jazzmin", album: "Nightfall"),
+                Track("Loud Noises", "Brick", album: "All JAZZ Hands"),
+                Track("Unrelated", "Nobody", album: "Silence"));
+            await pg.SaveChangesAsync();
+
+            var repo = new TrackRepository(
+                pg, NullLogger<Repository<DeepDrftContext, TrackEntity>>.Instance);
+            var result = await repo.GetPagedFilteredAsync(DefaultPaging(), new TrackFilter { SearchText = "jazz" });
+
+            Assert.That(result.Items.Select(t => t.TrackName),
+                Is.EquivalentTo(new[] { "Jazz Odyssey", "Quiet Storm", "Loud Noises" }),
+                "ILike matches 'jazz' case-insensitively in TrackName, Artist, or Album");
+        }
+        finally
+        {
+            await pg.Database.EnsureDeletedAsync();
+        }
+    }
+}