Volume Server: Unexpected Deletion of Remote Tier Data (#7377)

* [Admin UI] Login not possible due to securecookie error

* avoid 404 favicon

* Update weed/admin/dash/auth_middleware.go

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* address comments

* avoid variable over shadowing

* log session save error

* When jwt.signing.read.key is enabled in security.toml, the volume server requires JWT tokens for all read operations.

* reuse fileId

* refactor

* fix deleting remote tier

* simplify the fix

* Update weed/storage/volume_loading.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update weed/storage/volume_loading.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update weed/storage/volume_loading.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* fix

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

weed/storage/volume_loading.go

@@ -55,6 +55,19 @@ func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool, needleMapKind
 		if err := v.LoadRemoteFile(); err != nil {
 			return fmt.Errorf("load remote file %v: %w", v.volumeInfo, err)
 		}
+		// Set lastModifiedTsSeconds from remote file to prevent premature expiry on startup
+		if len(v.volumeInfo.GetFiles()) > 0 {
+			remoteFileModifiedTime := v.volumeInfo.GetFiles()[0].GetModifiedTime()
+			if remoteFileModifiedTime > 0 {
+				v.lastModifiedTsSeconds = remoteFileModifiedTime
+			} else {
+				// Fallback: use .vif file's modification time
+				if exists, _, _, modifiedTime, _ := util.CheckFile(v.FileName(".vif")); exists {
+					v.lastModifiedTsSeconds = uint64(modifiedTime.Unix())
+				}
+			}
+			glog.V(1).Infof("volume %d remote file lastModifiedTsSeconds set to %d", v.Id, v.lastModifiedTsSeconds)
+		}
 		alreadyHasSuperBlock = true
 	} else if exists, canRead, canWrite, modifiedTime, fileSize := util.CheckFile(v.FileName(".dat")); exists {
 		// open dat file