feat(admin): multi-select episode file deletion — checkboxes on downloaded rows

The plan's per-EPISODE bulk select for the admin view (§0 item 8
follow-up — trimmed in the first admin-view commit; user called it
back). Admins now tick checkboxes on DOWNLOADED episode rows and delete
their files in one request:

- Checkbox per row, rendered ONLY for admins + downloaded episodes
  (nothing to delete otherwise), via the existing podcastDetail Alpine
  component: selection ids/count survive the list's htmx swaps
  (reapplied on afterSwap — same pattern as the text filter) and clear
  after a successful bulk delete.
- Toolbar segment outside #episode-list (survives swaps): 'N selected'
  + 'Delete selected files' (hx-include gathers the CHECKED boxes);
  disabled-looking at zero selection; hx-confirm states the
  re-materialization contract. CSP-safe method bindings only
  (bulkSelectionLabel/Class) — no ternaries in Alpine expressions.
- POST /feeds/:id/episodes/delete-files (admin): repeated
  episode-file-select keys parsed via ParseForm directly (never bound —
  repeated-key wire is another echo-bind gotcha); each id validated to
  belong to THIS feed, so a forged foreign id is refused while the real
  selections apply; rows reset to pending, files removed.
- Tests: bulk of two real ids + one forged id → deleted:2, files gone,
  rows pending; non-admin 403; all prior single/feed-level pins hold.

cmd/server/tests/podcast_test.go

@@ -1399,6 +1399,46 @@ func TestAdminDeleteEpisodeFiles(t *testing.T) {
 	assert.Equal(t, "pending", after2.DownloadState)
 	assert.NoFileExists(t, pathFor(after2), "feed-level deletion clears the remaining file")
 
+	// --- bulk multi-select delete-files (§0 item 8 follow-up) ---
+	// Re-download both, then delete them in ONE request with a forged
+	// foreign id mixed in: only the matching-feed ids are applied.
+	for _, ep := range []database.MediaItems{ep1, ep2} {
+		require.NoError(t, setup.DB.SetPodcastEpisodePending(adminCtx, ep.ID))
+		_, err = setup.DB.SetPodcastEpisodeDownloadQueued(adminCtx, ep.ID)
+		require.NoError(t, err)
+	}
+	worker.DrainNow(context.Background())
+	require.Eventually(t, func() bool {
+		eps, err := setup.DB.ListPodcastEpisodes(adminCtx, feedRow.ID)
+		if err != nil || len(eps) != 2 {
+			return false
+		}
+		for _, ep := range eps {
+			if ep.DownloadState != "downloaded" {
+				return false
+			}
+		}
+		return true
+	}, 30*time.Second, 250*time.Millisecond, "both re-downloaded for the bulk test")
+
+	foreignID := uuid.New().String()
+	bulkForm := url.Values{}
+	bulkForm["episode-file-select"] = []string{uuid.UUID(ep1.ID.Bytes).String(), foreignID, uuid.UUID(ep2.ID.Bytes).String()}
+	code, rbody = podcastAuthedForm(t, setup, setup.Token, "POST", "/api/podcasts/feeds/"+feedIDStr+"/episodes/delete-files", bulkForm)
+	require.Equal(t, http.StatusOK, code, string(rbody))
+	assert.Contains(t, string(rbody), `"deleted":2`, "the forged foreign id is refused, the real two applied")
+	assert.NoFileExists(t, pathFor(ep1))
+	assert.NoFileExists(t, pathFor(ep2))
+	afterBulk, err := setup.DB.ListPodcastEpisodes(adminCtx, feedRow.ID)
+	require.NoError(t, err)
+	for _, ep := range afterBulk {
+		assert.Equal(t, "pending", ep.DownloadState, "bulk deletion resets every selected row (%s)", ep.Title)
+	}
+
+	// Non-admins cannot bulk-delete either.
+	code, _ = podcastAuthed(t, setup, setup.RegularToken, "POST", "/api/podcasts/feeds/"+feedIDStr+"/episodes/delete-files", "")
+	assert.Equal(t, http.StatusForbidden, code, "PIN: non-admins cannot bulk-delete files")
+
 	// --- refresh must NOT re-materialize deleted files (invariant 2):
 	// the poll upsert rewrites metadata but never touches download_state.
 	code, rbody = podcastAuthed(t, setup, setup.Token, "POST", "/api/podcasts/feeds/"+feedIDStr+"/refresh", "")

internal/handlers/podcast.go

@@ -120,6 +120,58 @@ func (h *PodcastHandler) AdminDeleteEpisodeFile(c *echo.Context) error {
 	return c.JSON(http.StatusOK, map[string]string{"message": "file deleted"})
 }
 
+// AdminDeleteEpisodeFilesBulk POST /api/podcasts/feeds/:id/episodes/delete-files —
+// admin-only (§0 item 8): multi-select file deletion. Body carries the
+// CHECKED boxes' values (form-encoded, repeated episode-file-select
+// keys — hx-include gathers them; parsed directly, never bound: the
+// repeated-key wire is another echo-bind gotcha). Each id is validated
+// to belong to THIS feed; rows reset to pending, files removed.
+func (h *PodcastHandler) AdminDeleteEpisodeFilesBulk(c *echo.Context) error {
+	user := MustGetAuthenticatedUser(c)
+	if user.Role != "admin" {
+		return c.JSON(http.StatusForbidden, map[string]string{"error": "admin only"})
+	}
+	feedID, err := parseUUID(c.Param("id"))
+	if err != nil {
+		return c.JSON(http.StatusBadRequest, map[string]string{"error": "invalid feed id"})
+	}
+	if err := c.Request().ParseForm(); err != nil {
+		return c.JSON(http.StatusBadRequest, map[string]string{"error": "invalid request"})
+	}
+	rawIDs := c.Request().PostForm["episode-file-select"]
+	if len(rawIDs) == 0 {
+		return c.JSON(http.StatusBadRequest, map[string]string{"error": "no episodes selected"})
+	}
+	actx, err := h.worker.AdminCtx(c.Request().Context())
+	if err != nil {
+		return podcastErrorResponse(c, err)
+	}
+
+	deleted := 0
+	for _, raw := range rawIDs {
+		episodeID, perr := parseUUID(raw)
+		if perr != nil {
+			continue
+		}
+		// The checkbox list only renders this feed's rows, but the wire
+		// is user-controlled: a forged id for a foreign feed's episode
+		// is refused (feed-match guard), not silently applied.
+		ep, gerr := h.db.GetPodcastEpisode(actx, episodeID)
+		if gerr != nil || ep.SourceFeedID != feedID {
+			continue
+		}
+		if derr := h.podcasts.AdminDeleteEpisodeFile(actx, episodeID); derr == nil {
+			deleted++
+		}
+	}
+	log.Printf("[PODCAST] admin: bulk-deleted files for %d/%d episode(s) of feed %s (user %s)",
+		deleted, len(rawIDs), feedID, user.Username)
+	if isHXRequest(c) {
+		return h.hxEpisodeList(c, feedID.String(), false, false)
+	}
+	return c.JSON(http.StatusOK, map[string]interface{}{"deleted": deleted})
+}
+
 // flipSubscriptionToAll implements issue #3: Download All (button or
 // add-feed checkbox) sets the CALLER's subscription policy to 'all' —
 // per-user, never global (files are shared D6, policies are not). The

internal/router/podcast.go

@@ -78,5 +78,6 @@ func registerPodcastRoutes(cfg *Config) {
 	// Admin maintenance (§0 item 8): file deletion frees the disk and
 	// resets rows to pending. Handler checks admin role.
 	feeds.POST("/delete-files", handlers.AdminMiddleware(cfg.PodcastHandler.AdminDeleteFeedFiles))
+	feeds.POST("/episodes/delete-files", handlers.AdminMiddleware(cfg.PodcastHandler.AdminDeleteEpisodeFilesBulk))
 	feeds.POST("/episodes/:eid/delete-file", handlers.AdminMiddleware(cfg.PodcastHandler.AdminDeleteEpisodeFile))
 }

templates/podcast_detail.templ

@@ -240,6 +240,31 @@ templ PodcastDetailPage(user User, data PodcastDetailData) {
 						Hide played/downloaded
 					</label>
 					<span class="text-xs hidden" x-ref="filterEmptyNote" style="color: var(--text-secondary)">No episodes match the filter.</span>
+
+					<!-- Admin bulk file deletion (§0 item 8 follow-up): the
+					     transport for the per-row checkboxes inside the episode
+					     list. Lives OUTSIDE #episode-list so the button survives
+					     the list's htmx swaps; hx-include gathers the CHECKED
+					     boxes into the post body. State (count/ids) lives in the
+					     podcastDetail component — CSP-safe method bindings only. -->
+					if data.IsAdmin && data.Feed.DownloadedN > 0 {
+						<div class="ml-auto flex items-center gap-2">
+							<span class="text-xs tabular-nums" style="color: var(--text-secondary)" x-text="bulkSelectionLabel()"></span>
+							<button
+								id="episode-bulk-delete"
+								type="button"
+								class="btn btn-secondary text-xs"
+								:class="bulkSelectionClass()"
+								hx-post={ "/api/podcasts/feeds/" + data.Feed.ID + "/episodes/delete-files" }
+								hx-include="input[name='episode-file-select']:checked"
+								hx-swap="none"
+								hx-confirm="Delete the selected episode files? Rows reset to pending (a feed refresh will not re-materialize them); episodes re-download on demand."
+								style="color: var(--status-warning, #d97706);"
+							>
+								Delete selected files
+							</button>
+						</div>
+					}
 				</div>
 
 				<!-- Episode list (self-refreshing htmx partial). Pick the
@@ -277,7 +302,7 @@ templ PodcastEpisodeList(data PodcastDetailData) {
 		} else {
 			<div class="flex flex-col gap-2">
 				for _, ep := range data.Episodes {
-					@PodcastEpisodeRowView(ep)
+					@PodcastEpisodeRowView(ep, data.IsAdmin)
 				}
 			</div>
 		}
@@ -297,13 +322,13 @@ templ PodcastEpisodeListPolling(data PodcastDetailData) {
 		<h2 class="text-lg font-bold mb-3" style="color: var(--text-primary)">Episodes</h2>
 		<div class="flex flex-col gap-2">
 			for _, ep := range data.Episodes {
-				@PodcastEpisodeRowView(ep)
+				@PodcastEpisodeRowView(ep, data.IsAdmin)
 			}
 		</div>
 	</div>
 }
 
-templ PodcastEpisodeRowView(ep PodcastEpisodeRow) {
+templ PodcastEpisodeRowView(ep PodcastEpisodeRow, isAdmin bool) {
 	<div
 		class="card p-3 flex items-center gap-3"
 		data-episode-row="true"
@@ -311,6 +336,26 @@ templ PodcastEpisodeRowView(ep PodcastEpisodeRow) {
 		data-listen-pct={ podcastPct(ep.ListenPct) }
 		data-search-text={ strings.ToLower(ep.Title + " " + ep.Description) }
 	>
+		<!-- Admin bulk-select (§0 item 8 follow-up): multi-select
+		     downloaded episodes for file deletion. Rendered ONLY for
+		     admins + DOWNLOADED rows — a checkbox on a file-less episode
+		     would be an invitation to confusion. State survives the
+		     list's htmx swaps via the podcastDetail component
+		     (reapplied on afterSwap). -->
+		if isAdmin {
+			if ep.Downloaded {
+				<input
+					type="checkbox"
+					name="episode-file-select"
+					value={ ep.ID }
+					class="cursor-pointer shrink-0"
+					aria-label={ "Select " + ep.Title + " for file deletion" }
+					@change="toggleBulkSelection($event.target)"
+				/>
+			} else {
+				<span class="w-4 shrink-0"></span>
+			}
+		}
 		<span class="text-xs font-mono w-10 shrink-0 text-right" style="color: var(--text-secondary)">
 			{ podcastInt(ep.Position) }
 		</span>

web/src/podcasts.ts

@@ -24,6 +24,63 @@ Alpine.data("podcastDetail", () => ({
   unsubOpen: false,
   filterListenerInstalled: false,
 
+  // Admin bulk file selection (§0 item 8 follow-up): ids of CHECKED
+  // episode rows. Survives the list's htmx swaps (rows re-render fresh
+  // and unchecked → reapplied on afterSwap); cleared after a successful
+  // bulk delete. Plain array — deliberately NOT reactive state beyond
+  // bulkCount, which the toolbar binds.
+  bulkIds: [] as string[],
+  bulkCount: 0,
+
+  bulkSelectionLabel(): string {
+    return this.bulkCount === 0 ? "" : this.bulkCount + " selected";
+  },
+
+  bulkSelectionClass(): string {
+    return this.bulkCount === 0 ? "opacity-40 pointer-events-none" : "";
+  },
+
+  toggleBulkSelection(target: HTMLInputElement): void {
+    const id = target.value;
+    if (!id) return;
+    if (target.checked) {
+      if (!this.bulkIds.includes(id)) this.bulkIds.push(id);
+    } else {
+      this.bulkIds = this.bulkIds.filter((v) => v !== id);
+    }
+    this.bulkCount = this.bulkIds.length;
+  },
+
+  // After each swap the list re-renders unchecked; restore ticks for
+  // ids still selected. Ids whose rows vanished (deleted / state
+  // flipped) silently drop out.
+  reapplyBulkSelection(): void {
+    if (this.bulkIds.length === 0) return;
+    document
+      .querySelectorAll<HTMLInputElement>("input[name='episode-file-select']")
+      .forEach((box) => {
+        box.checked = this.bulkIds.includes(box.value);
+      });
+    // Drop ids whose checkboxes no longer exist.
+    const present = new Set(
+      Array.from(
+        document.querySelectorAll<HTMLInputElement>("input[name='episode-file-select']"),
+      ).map((b) => b.value),
+    );
+    this.bulkIds = this.bulkIds.filter((id) => present.has(id));
+    this.bulkCount = this.bulkIds.length;
+  },
+
+  clearBulkSelection(): void {
+    this.bulkIds = [];
+    this.bulkCount = 0;
+    document
+      .querySelectorAll<HTMLInputElement>("input[name='episode-file-select']:checked")
+      .forEach((box) => {
+        box.checked = false;
+      });
+  },
+
   // Episode-list filters (§0 item 6, 2026-10-30): hide played/
   // downloaded rows and/or substring-filter titles+descriptions. Pure
   // presentation — the DOM IS the data (rows carry data-* attributes
@@ -53,14 +110,24 @@ Alpine.data("podcastDetail", () => ({
   },
 
   // Re-apply after every htmx swap of the list (polling + action
-  // responses swap #episode-list wholesale; fresh rows must honor the
-  // active filter). Installed once per page.
+  // responses swap #episode-list wholesale): fresh rows must honor the
+  // active filter AND restored bulk-selection ticks; a successful bulk
+  // delete clears the selection. Installed once per page.
   initPodcastFilterPersistence(): void {
     if (this.filterListenerInstalled) return;
     this.filterListenerInstalled = true;
     document.addEventListener("htmx:afterSwap", () => {
+      this.reapplyBulkSelection();
       this.applyEpisodeFilter();
     });
+    // Successful bulk delete → the list swaps fresh; drop the state.
+    document.addEventListener("htmx:afterRequest", (evt) => {
+      const custom = evt as CustomEvent<{ successful: boolean; elt: HTMLElement }>;
+      const elt = custom.detail.elt as HTMLElement | undefined;
+      if (custom.detail.successful && elt && elt.id === "episode-bulk-delete") {
+        this.clearBulkSelection();
+      }
+    });
   },
 }));