Refactor project templates (#26448)

This PR refactors a bunch of projects-related code, mostly the
templates.
The following things were done:
  - rename boards to columns in frontend code
  - use the new `ctx.Locale.Tr` method
  - cleanup template, remove useless newlines, classes, comments
  - merge org-/user and repo level project template together
    - move "new column" button into project toolbar
- move issue card (shared by projects and pinned issues) to shared
template, remove useless duplicated styles
- add search function to projects (to make the layout more similar to
milestones list where it is inherited from :laughing:)
  - maybe more changes I forgot I've done :laughing: 

Closes #24893

After:
![Bildschirmfoto vom 2023-08-10
23-02-00](https://github.com/go-gitea/gitea/assets/47871822/cab61456-1d23-4373-8163-e567f1b3b5f9)
![Bildschirmfoto vom 2023-08-10
23-02-26](https://github.com/go-gitea/gitea/assets/47871822/94b55d60-5572-48eb-8111-538a52d8bcc6)
![Bildschirmfoto vom 2023-08-10
23-02-46](https://github.com/go-gitea/gitea/assets/47871822/a0358f4b-4e05-4194-a7bc-6e0ecba5a9b6)

---------

Co-authored-by: silverwind <me@silverwind.io>

2 files changed, 68 insertions, 55 deletions

diff --git a/templates/repo/issue/card.tmpl b/templates/repo/issue/card.tmpl
new file mode 100644
index 0000000000..05b7dbaabc
--- /dev/null
+++ b/templates/repo/issue/card.tmpl
@@ -0,0 +1,66 @@
+{{with .Issue}}
+	{{if eq $.Page.Project.CardType 1}}{{/* Images and Text*/}}
+		<div class="card-attachment-images">
+			{{range (index $.Page.issuesAttachmentMap .ID)}}
+				<img src="{{.DownloadURL}}" alt="{{.Name}}" />
+			{{end}}
+		</div>
+	{{end}}
+	<div class="content gt-p-0 gt-w-100">
+		<div class="gt-df gt-items-start">
+			<div class="issue-card-icon">
+				{{template "shared/issueicon" .}}
+			</div>
+			<a class="issue-card-title muted issue-title" href="{{.Link}}">{{.Title | RenderEmoji ctx | RenderCodeBlock}}</a>
+			{{if and $.isPinnedIssueCard $.Page.IsRepoAdmin}}
+				<a role="button" class="issue-card-unpin muted gt-df gt-ac" data-tooltip-content={{ctx.Locale.Tr "repo.issues.unpin_issue"}} data-issue-id="{{.ID}}" data-unpin-url="{{$.Page.Link}}/unpin/{{.Index}}">
+					{{svg "octicon-x" 16}}
+				</a>
+			{{end}}
+		</div>
+		<div class="meta gt-my-2">
+			<span class="text light grey muted-links">
+				{{if not $.Page.Repository}}{{.Repo.FullName}}{{end}}#{{.Index}}
+				{{$timeStr := TimeSinceUnix .GetLastEventTimestamp ctx.Locale}}
+				{{if .OriginalAuthor}}
+					{{ctx.Locale.Tr .GetLastEventLabelFake $timeStr (.OriginalAuthor|Escape) | Safe}}
+				{{else if gt .Poster.ID 0}}
+					{{ctx.Locale.Tr .GetLastEventLabel $timeStr (.Poster.HomeLink|Escape) (.Poster.GetDisplayName | Escape) | Safe}}
+				{{else}}
+					{{ctx.Locale.Tr .GetLastEventLabelFake $timeStr (.Poster.GetDisplayName | Escape) | Safe}}
+				{{end}}
+			</span>
+		</div>
+		{{if .MilestoneID}}
+		<div class="meta gt-my-2">
+			<a class="milestone" href="{{$.Page.RepoLink}}/milestone/{{.MilestoneID}}">
+				{{svg "octicon-milestone" 16 "gt-mr-2 gt-vm"}}
+				<span class="gt-vm">{{.Milestone.Name}}</span>
+			</a>
+		</div>
+		{{end}}
+		{{if $.Page.LinkedPRs}}
+		{{range index $.Page.LinkedPRs .ID}}
+		<div class="meta gt-my-2">
+			<a href="{{$.Page.RepoLink}}/pulls/{{.Index}}">
+				<span class="gt-m-0 text {{if .PullRequest.HasMerged}}purple{{else if .IsClosed}}red{{else}}green{{end}}">{{svg "octicon-git-merge" 16 "gt-mr-2 gt-vm"}}</span>
+				<span class="gt-vm">{{.Title}} <span class="text light grey">#{{.Index}}</span></span>
+			</a>
+		</div>
+		{{end}}
+		{{end}}
+	</div>
+
+	{{if or .Labels .Assignees}}
+	<div class="extra content labels-list gt-p-0 gt-pt-2">
+		{{range .Labels}}
+			<a target="_blank" href="{{$.Page.RepoLink}}/issues?labels={{.ID}}">{{RenderLabel ctx .}}</a>
+		{{end}}
+		<div class="right floated">
+			{{range .Assignees}}
+				<a target="_blank" href="{{.HomeLink}}" data-tooltip-content="{{ctx.Locale.Tr "repo.projects.column.assigned_to"}} {{.Name}}">{{ctx.AvatarUtils.Avatar . 28 "mini gt-mr-3"}}</a>
+			{{end}}
+		</div>
+	</div>
+	{{end}}
+{{end}}
diff --git a/templates/repo/issue/list.tmpl b/templates/repo/issue/list.tmpl
index 7ae65efedc..789ba4020f 100644
--- a/templates/repo/issue/list.tmpl
+++ b/templates/repo/issue/list.tmpl
@@ -6,61 +6,8 @@
 	{{if .PinnedIssues}}
 		<div id="issue-pins" {{if .IsRepoAdmin}}data-is-repo-admin{{end}}>
 			{{range .PinnedIssues}}
-				<div class="pinned-issue-card gt-word-break" data-move-url="{{$.Link}}/move_pin" data-issue-id="{{.ID}}">
-					{{if eq $.Project.CardType 1}}
-						<div class="card-attachment-images">
-							{{range (index $.issuesAttachmentMap .ID)}}
-								<img src="{{.DownloadURL}}" alt="{{.Name}}">
-							{{end}}
-						</div>
-					{{end}}
-					<div class="content gt-p-0">
-						<div class="header gt-df gt-items-start">
-							<div class="pinned-issue-icon">
-								{{template "shared/issueicon" .}}
-							</div>
-							<a class="pinned-issue-title muted issue-title" href="{{.Link}}">{{.Title | RenderEmoji $.Context | RenderCodeBlock}}</a>
-							{{if $.IsRepoAdmin}}
-								<a role="button" class="pinned-issue-unpin muted gt-df gt-ac" data-tooltip-content={{$.locale.Tr "repo.issues.unpin_issue"}} data-issue-id="{{.ID}}" data-unpin-url="{{$.Link}}/unpin/{{.Index}}">
-									{{svg "octicon-x" 16}}
-								</a>
-							{{end}}
-						</div>
-						<div class="meta gt-my-2">
-							<span class="text light grey muted-links">
-								#{{.Index}}
-								{{$timeStr := TimeSinceUnix .GetLastEventTimestamp $.locale}}
-								{{if .OriginalAuthor}}
-									{{$.locale.Tr .GetLastEventLabelFake $timeStr (.OriginalAuthor|Escape) | Safe}}
-								{{else if gt .Poster.ID 0}}
-									{{$.locale.Tr .GetLastEventLabel $timeStr (.Poster.HomeLink|Escape) (.Poster.GetDisplayName | Escape) | Safe}}
-								{{else}}
-									{{$.locale.Tr .GetLastEventLabelFake $timeStr (.Poster.GetDisplayName | Escape) | Safe}}
-								{{end}}
-							</span>
-						</div>
-						{{- if .MilestoneID}}
-						<div class="meta gt-my-2">
-							<a class="milestone" href="{{$.RepoLink}}/milestone/{{.MilestoneID}}">
-								{{svg "octicon-milestone" 16 "gt-mr-2 gt-vm"}}
-								<span class="gt-vm">{{.Milestone.Name}}</span>
-							</a>
-						</div>
-						{{- end}}
-					</div>
-
-					{{if or .Labels .Assignees}}
-					<div class="extra content labels-list gt-p-0 gt-pt-2">
-						{{range .Labels}}
-							<a href="{{$.RepoLink}}/issues?labels={{.ID}}">{{RenderLabel $.Context .}}</a>
-						{{end}}
-						<div class="right floated">
-							{{range .Assignees}}
-								<a href="{{.HomeLink}}" data-tooltip-content="{{$.locale.Tr "repo.projects.column.assigned_to"}} {{.Name}}">{{ctx.AvatarUtils.Avatar . 28 "mini gt-mr-3"}}</a>
-							{{end}}
-						</div>
-					</div>
-					{{end}}
+				<div class="issue-card gt-word-break {{if $.IsRepoAdmin}}gt-cursor-grab{{end}}" data-move-url="{{$.Link}}/move_pin" data-issue-id="{{.ID}}">
+					{{template "repo/issue/card" (dict "Issue" . "Page" $ "isPinnedIssueCard" true)}}
 				</div>
 			{{end}}
 		</div>