Improve feed icons and feed merge text color (#27498)

1. Improve various feed icons
2. Fix merge message color


<img width="763" alt="image"
src="https://github.com/go-gitea/gitea/assets/115237/3f5bcb23-6d90-4c63-85f2-46bd7e1c96d6">
<img width="769" alt="image"
src="https://github.com/go-gitea/gitea/assets/115237/466c37b4-e2f4-42bb-922d-b86596cdc6d0">


Fixes: #27495
Continues: #27356

modules/templates/util_misc.go

@@ -74,27 +74,31 @@ func ActionIcon(opType activities_model.ActionType) string {
 	switch opType {
 	case activities_model.ActionCreateRepo, activities_model.ActionTransferRepo, activities_model.ActionRenameRepo:
 		return "repo"
-	case activities_model.ActionCommitRepo, activities_model.ActionPushTag, activities_model.ActionDeleteTag, activities_model.ActionDeleteBranch:
+	case activities_model.ActionCommitRepo:
 		return "git-commit"
-	case activities_model.ActionCreateIssue:
-		return "issue-opened"
-	case activities_model.ActionCreatePullRequest:
-		return "git-pull-request"
-	case activities_model.ActionCommentIssue, activities_model.ActionCommentPull:
-		return "comment-discussion"
+	case activities_model.ActionDeleteBranch:
+		return "git-branch"
 	case activities_model.ActionMergePullRequest, activities_model.ActionAutoMergePullRequest:
 		return "git-merge"
-	case activities_model.ActionCloseIssue, activities_model.ActionClosePullRequest:
+	case activities_model.ActionCreatePullRequest:
+		return "git-pull-request"
+	case activities_model.ActionClosePullRequest:
+		return "git-pull-request-closed"
+	case activities_model.ActionCreateIssue:
+		return "issue-opened"
+	case activities_model.ActionCloseIssue:
 		return "issue-closed"
 	case activities_model.ActionReopenIssue, activities_model.ActionReopenPullRequest:
 		return "issue-reopened"
+	case activities_model.ActionCommentIssue, activities_model.ActionCommentPull:
+		return "comment-discussion"
 	case activities_model.ActionMirrorSyncPush, activities_model.ActionMirrorSyncCreate, activities_model.ActionMirrorSyncDelete:
 		return "mirror"
 	case activities_model.ActionApprovePullRequest:
 		return "check"
 	case activities_model.ActionRejectPullRequest:
-		return "diff"
-	case activities_model.ActionPublishRelease:
+		return "file-diff"
+	case activities_model.ActionPublishRelease, activities_model.ActionPushTag, activities_model.ActionDeleteTag:
 		return "tag"
 	case activities_model.ActionPullReviewDismissed:
 		return "x"

templates/user/dashboard/feeds.tmpl

@@ -109,12 +109,12 @@
 						<div class="markup gt-font-14">{{RenderMarkdownToHtml ctx $comment}}</div>
 					{{end}}
 				{{else if .GetOpType.InActions "merge_pull_request"}}
-					<div class="flex-item-body">{{index .GetIssueInfos 1}}</div>
+					<div class="flex-item-body text black">{{index .GetIssueInfos 1}}</div>
 				{{else if .GetOpType.InActions "close_issue" "reopen_issue" "close_pull_request" "reopen_pull_request"}}
 					<span class="text truncate issue title">{{(.GetIssueTitle ctx) | RenderEmoji $.Context | RenderCodeBlock}}</span>
 				{{else if .GetOpType.InActions "pull_review_dismissed"}}
-				<div class="flex-item-body">{{ctx.Locale.Tr "action.review_dismissed_reason"}}</div>
-				<div class="flex-item-body">{{index .GetIssueInfos 2 | RenderEmoji $.Context}}</div>
+				<div class="flex-item-body text black">{{ctx.Locale.Tr "action.review_dismissed_reason"}}</div>
+				<div class="flex-item-body text black">{{index .GetIssueInfos 2 | RenderEmoji $.Context}}</div>
 				{{end}}
 			</div>
 			<div class="flex-item-trailing">