feat(export): add HTML card deck export

Self-contained single-file HTML export for cards. Mobile-first,
dark theme, zero dependencies. Each card type gets its own
interactive treatment: snippet tap-to-copy, template slot filling,
checklist with progress bar, decision structured layout, link
tap targets. Filter chips by type, search across all cards.

Usage: nib export -f html -o deck.html
       nib export -f html -t triage -o triage.html

cmd/export.go

@@ -6,19 +6,28 @@ import (
 	"os"
 
 	"github.com/lerko/nib/internal/db"
+	"github.com/lerko/nib/internal/export"
 	"github.com/spf13/cobra"
 )
 
-var exportOutput string
+var (
+	exportOutput string
+	exportFormat string
+	exportTag    string
+	exportTitle  string
+)
 
 var exportCmd = &cobra.Command{
 	Use:   "export",
-	Short: "dump all entities to JSON",
+	Short: "export entities to JSON or HTML card deck",
 	RunE:  runExport,
 }
 
 func init() {
 	exportCmd.Flags().StringVarP(&exportOutput, "output", "o", "", "write to file instead of stdout")
+	exportCmd.Flags().StringVarP(&exportFormat, "format", "f", "json", "output format: json or html")
+	exportCmd.Flags().StringVarP(&exportTag, "tag", "t", "", "filter by tag (used as deck name for HTML)")
+	exportCmd.Flags().StringVar(&exportTitle, "title", "", "deck title for HTML export")
 	rootCmd.AddCommand(exportCmd)
 }
 
@@ -48,13 +57,58 @@ func runExport(cmd *cobra.Command, _ []string) error {
 	}
 	defer store.Close()
 
-	ctx := cmd.Context()
-
 	p := db.DefaultListParams()
-	p.IncludeDeleted = true
 	p.Limit = 10000
 
-	entities, err := store.List(ctx, p)
+	if exportTag != "" {
+		p.Tag = &exportTag
+	}
+
+	switch exportFormat {
+	case "html":
+		return runHTMLExport(cmd, store, p)
+	case "json":
+		p.IncludeDeleted = true
+		return runJSONExport(cmd, store, p)
+	default:
+		return fmt.Errorf("unknown format %q (use json or html)", exportFormat)
+	}
+}
+
+func runHTMLExport(cmd *cobra.Command, store *db.Store, p db.ListParams) error {
+	p.CardsOnly = true
+
+	entities, err := store.List(cmd.Context(), p)
+	if err != nil {
+		return err
+	}
+
+	title := exportTitle
+	if title == "" && exportTag != "" {
+		title = "#" + exportTag
+	}
+	if title == "" {
+		title = "nib cards"
+	}
+
+	if exportOutput != "" {
+		f, err := os.Create(exportOutput)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+		if err := export.RenderHTML(f, entities, title); err != nil {
+			return err
+		}
+		fmt.Fprintf(cmd.ErrOrStderr(), "exported %d cards to %s\n", len(entities), exportOutput)
+		return nil
+	}
+
+	return export.RenderHTML(cmd.OutOrStdout(), entities, title)
+}
+
+func runJSONExport(cmd *cobra.Command, store *db.Store, p db.ListParams) error {
+	entities, err := store.List(cmd.Context(), p)
 	if err != nil {
 		return err
 	}

internal/export/html.go

@@ -0,0 +1,181 @@
+package export
+
+import (
+	_ "embed"
+	"encoding/json"
+	"html/template"
+	"io"
+	"strings"
+	"time"
+
+	"github.com/lerko/nib/internal/db"
+	"github.com/lerko/nib/internal/display"
+)
+
+//go:embed template.html
+var templateHTML string
+
+type TemplateSlot struct {
+	Name    string `json:"name"`
+	Default string `json:"default"`
+}
+
+type CheckStep struct {
+	Text string `json:"text"`
+	Done bool   `json:"done"`
+}
+
+type DecisionData struct {
+	Chose    string   `json:"chose"`
+	Why      string   `json:"why"`
+	Rejected []string `json:"rejected"`
+}
+
+type CardView struct {
+	ID           string
+	Glyph        string
+	CardType     string
+	Title        string
+	Body         template.HTML
+	Description  template.HTML
+	SearchText   string
+	Pinned       bool
+	Tags         []string
+	UseCount     int
+	LinkURL      string
+	Slots        []TemplateSlot
+	TemplateBody string
+	Steps        []CheckStep
+	Progress     int
+	Decision     DecisionData
+}
+
+type DeckView struct {
+	Title      string
+	Count      int
+	ExportedAt string
+	Types      []string
+	Cards      []CardView
+}
+
+func RenderHTML(w io.Writer, entities []*db.Entity, title string) error {
+	tmpl, err := template.New("deck").Parse(templateHTML)
+	if err != nil {
+		return err
+	}
+
+	seen := map[string]bool{}
+	var types []string
+	var cards []CardView
+
+	for _, e := range entities {
+		if e.CardType == nil {
+			continue
+		}
+		ct := string(*e.CardType)
+		if !seen[ct] {
+			seen[ct] = true
+			types = append(types, ct)
+		}
+		cards = append(cards, buildCardView(e))
+	}
+
+	data := DeckView{
+		Title:      title,
+		Count:      len(cards),
+		ExportedAt: time.Now().Format("Jan 2, 2006"),
+		Types:      types,
+		Cards:      cards,
+	}
+
+	return tmpl.Execute(w, data)
+}
+
+func buildCardView(e *db.Entity) CardView {
+	ct := ""
+	if e.CardType != nil {
+		ct = string(*e.CardType)
+	}
+
+	title := ""
+	if e.Title != nil {
+		title = *e.Title
+	}
+
+	body := e.Body
+	desc := ""
+	if e.Description != nil {
+		desc = *e.Description
+	}
+
+	search := strings.ToLower(title + " " + body + " " + desc + " " + strings.Join(e.Tags, " "))
+
+	cv := CardView{
+		ID:         e.ID,
+		Glyph:      display.DisplayGlyph(e.Glyph, e.CardType),
+		CardType:   ct,
+		Title:      title,
+		Body:       template.HTML(template.HTMLEscapeString(body)),
+		SearchText: search,
+		Pinned:     e.Pinned,
+		Tags:       e.Tags,
+		UseCount:   e.UseCount,
+	}
+
+	if desc != "" {
+		cv.Description = template.HTML(template.HTMLEscapeString(desc))
+	}
+
+	if e.CardData != nil {
+		parseCardData(&cv, ct, *e.CardData, body)
+	}
+
+	return cv
+}
+
+func parseCardData(cv *CardView, ct string, raw string, body string) {
+	switch ct {
+	case "snippet":
+		// body is the snippet content, already set
+
+	case "template":
+		var data struct {
+			Slots []TemplateSlot `json:"slots"`
+		}
+		if json.Unmarshal([]byte(raw), &data) == nil {
+			cv.Slots = data.Slots
+		}
+		cv.TemplateBody = body
+
+	case "checklist":
+		var data struct {
+			Steps []CheckStep `json:"steps"`
+		}
+		if json.Unmarshal([]byte(raw), &data) == nil {
+			cv.Steps = data.Steps
+			done := 0
+			for _, s := range cv.Steps {
+				if s.Done {
+					done++
+				}
+			}
+			if len(cv.Steps) > 0 {
+				cv.Progress = (done * 100) / len(cv.Steps)
+			}
+		}
+
+	case "decision":
+		var dec DecisionData
+		if json.Unmarshal([]byte(raw), &dec) == nil {
+			cv.Decision = dec
+		}
+
+	case "link":
+		var data struct {
+			URL string `json:"url"`
+		}
+		if json.Unmarshal([]byte(raw), &data) == nil {
+			cv.LinkURL = data.URL
+		}
+	}
+}

internal/export/template.html

@@ -0,0 +1,355 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">
+<title>{{.Title}}</title>
+<style>
+*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
+
+:root{
+  --bg:#111110;--surface:#1a1a19;--surface2:#232322;
+  --border:#2e2e2c;--border-focus:#4a4a47;
+  --text:#e8e6e1;--text2:#9a9890;--text3:#6b6a63;
+  --accent:#c4a46c;--accent2:#a68a52;
+  --red:#c45b5b;--green:#6bab6b;--blue:#6b8fc4;
+  --mono:"Berkeley Mono","SF Mono","Cascadia Code","JetBrains Mono",monospace;
+  --sans:"Inter","SF Pro Text","Segoe UI",system-ui,sans-serif;
+  --card-radius:12px;
+  --safe-bottom:env(safe-area-inset-bottom,0px);
+}
+
+html{font-size:16px;-webkit-text-size-adjust:100%}
+body{
+  font-family:var(--sans);color:var(--text);background:var(--bg);
+  min-height:100dvh;padding:0 0 calc(72px + var(--safe-bottom));
+  -webkit-font-smoothing:antialiased;
+}
+
+.deck-header{
+  position:sticky;top:0;z-index:10;
+  background:var(--bg);border-bottom:1px solid var(--border);
+  padding:16px 20px 12px;
+}
+.deck-title{font-size:1.25rem;font-weight:600;color:var(--text);letter-spacing:-0.01em}
+.deck-meta{font-size:0.8rem;color:var(--text3);margin-top:4px}
+
+.filter-bar{
+  display:flex;gap:8px;padding:12px 20px;overflow-x:auto;
+  -webkit-overflow-scrolling:touch;scrollbar-width:none;
+}
+.filter-bar::-webkit-scrollbar{display:none}
+.filter-chip{
+  flex-shrink:0;padding:6px 14px;border-radius:20px;
+  font-size:0.8rem;font-weight:500;border:1px solid var(--border);
+  background:var(--surface);color:var(--text2);cursor:pointer;
+  transition:all 0.15s ease;-webkit-tap-highlight-color:transparent;
+}
+.filter-chip.active{background:var(--accent);color:var(--bg);border-color:var(--accent)}
+
+.search-wrap{padding:8px 20px 4px}
+.search-input{
+  width:100%;padding:10px 14px;border-radius:10px;border:1px solid var(--border);
+  background:var(--surface);color:var(--text);font-size:0.9rem;
+  font-family:var(--sans);outline:none;transition:border-color 0.15s;
+}
+.search-input:focus{border-color:var(--accent)}
+.search-input::placeholder{color:var(--text3)}
+
+.card-list{padding:8px 16px}
+
+.card{
+  background:var(--surface);border:1px solid var(--border);
+  border-radius:var(--card-radius);padding:16px;margin-bottom:10px;
+  transition:border-color 0.15s;position:relative;
+}
+.card:active{border-color:var(--border-focus)}
+.card.pinned{border-left:3px solid var(--accent)}
+
+.card-top{display:flex;align-items:center;gap:8px;margin-bottom:8px}
+.card-glyph{
+  font-size:1.1rem;width:28px;height:28px;
+  display:flex;align-items:center;justify-content:center;
+  background:var(--surface2);border-radius:6px;flex-shrink:0;
+}
+.card-type{
+  font-size:0.7rem;font-weight:600;text-transform:uppercase;letter-spacing:0.05em;
+  color:var(--text3);
+}
+.card-use{font-size:0.7rem;color:var(--text3);margin-left:auto}
+
+.card-title{
+  font-size:0.95rem;font-weight:600;color:var(--text);
+  line-height:1.4;margin-bottom:6px;
+}
+.card-body{
+  font-size:0.85rem;color:var(--text2);line-height:1.55;
+  white-space:pre-wrap;word-break:break-word;
+}
+
+.card-body code{
+  font-family:var(--mono);font-size:0.8rem;
+  background:var(--surface2);padding:2px 5px;border-radius:4px;
+}
+
+.card-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
+.tag{
+  font-size:0.7rem;color:var(--accent);background:var(--surface2);
+  padding:3px 8px;border-radius:6px;
+}
+
+/* snippet */
+.snippet-block{
+  background:var(--bg);border:1px solid var(--border);border-radius:8px;
+  padding:12px;margin-top:8px;position:relative;overflow-x:auto;
+}
+.snippet-block pre{
+  font-family:var(--mono);font-size:0.8rem;color:var(--text);
+  white-space:pre-wrap;word-break:break-word;margin:0;line-height:1.5;
+}
+.copy-btn{
+  position:absolute;top:8px;right:8px;
+  padding:4px 10px;border-radius:6px;border:1px solid var(--border);
+  background:var(--surface);color:var(--text2);font-size:0.7rem;
+  cursor:pointer;transition:all 0.15s;
+}
+.copy-btn:active{background:var(--accent);color:var(--bg);border-color:var(--accent)}
+
+/* checklist */
+.checklist{margin-top:8px;list-style:none}
+.checklist li{
+  display:flex;align-items:flex-start;gap:10px;
+  padding:8px 0;border-bottom:1px solid var(--border);
+  font-size:0.85rem;color:var(--text2);
+}
+.checklist li:last-child{border-bottom:none}
+.check-box{
+  width:20px;height:20px;border-radius:5px;border:2px solid var(--border);
+  flex-shrink:0;cursor:pointer;display:flex;align-items:center;justify-content:center;
+  transition:all 0.15s;margin-top:1px;
+}
+.check-box.checked{background:var(--green);border-color:var(--green)}
+.check-box.checked::after{content:"✓";color:var(--bg);font-size:0.7rem;font-weight:700}
+.check-text.done{text-decoration:line-through;color:var(--text3)}
+.progress-bar{
+  height:4px;background:var(--surface2);border-radius:2px;margin-top:10px;overflow:hidden;
+}
+.progress-fill{height:100%;background:var(--green);border-radius:2px;transition:width 0.3s}
+
+/* template */
+.template-field{margin-top:8px}
+.template-field label{
+  display:block;font-size:0.7rem;font-weight:600;
+  text-transform:uppercase;letter-spacing:0.05em;
+  color:var(--text3);margin-bottom:4px;
+}
+.template-field input{
+  width:100%;padding:8px 12px;border-radius:8px;
+  border:1px solid var(--border);background:var(--surface2);
+  color:var(--text);font-size:0.85rem;font-family:var(--sans);
+  outline:none;transition:border-color 0.15s;
+}
+.template-field input:focus{border-color:var(--accent)}
+.template-output{margin-top:10px}
+.template-copy-btn{
+  width:100%;padding:10px;border-radius:8px;border:1px solid var(--accent);
+  background:transparent;color:var(--accent);font-size:0.85rem;font-weight:600;
+  cursor:pointer;transition:all 0.15s;font-family:var(--sans);
+}
+.template-copy-btn:active{background:var(--accent);color:var(--bg)}
+
+/* decision */
+.decision-grid{margin-top:8px}
+.decision-row{
+  padding:8px 0;border-bottom:1px solid var(--border);
+}
+.decision-row:last-child{border-bottom:none}
+.decision-label{
+  font-size:0.7rem;font-weight:600;text-transform:uppercase;
+  letter-spacing:0.05em;color:var(--text3);margin-bottom:2px;
+}
+.decision-value{font-size:0.85rem;color:var(--text);line-height:1.4}
+.decision-rejected{color:var(--red);font-style:italic}
+
+/* link */
+.link-target{
+  display:flex;align-items:center;gap:10px;margin-top:8px;
+  padding:12px;background:var(--bg);border:1px solid var(--border);
+  border-radius:8px;text-decoration:none;color:var(--text);
+  transition:border-color 0.15s;
+}
+.link-target:active{border-color:var(--accent)}
+.link-url{font-size:0.8rem;color:var(--text2);word-break:break-all;flex:1}
+.link-arrow{font-size:1.2rem;color:var(--accent);flex-shrink:0}
+
+.empty-state{
+  text-align:center;padding:60px 20px;color:var(--text3);font-size:0.9rem;
+}
+
+@media(min-width:640px){
+  .card-list{
+    display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
+    gap:10px;padding:8px 20px;
+  }
+  .card{margin-bottom:0}
+}
+</style>
+</head>
+<body>
+
+<div class="deck-header">
+  <div class="deck-title">{{.Title}}</div>
+  <div class="deck-meta">{{.Count}} cards{{if .ExportedAt}} · exported {{.ExportedAt}}{{end}}</div>
+</div>
+
+<div class="search-wrap">
+  <input type="text" class="search-input" placeholder="search cards…" id="search">
+</div>
+
+<div class="filter-bar" id="filters">
+  <button class="filter-chip active" data-type="all">All</button>
+  {{range .Types}}
+  <button class="filter-chip" data-type="{{.}}">{{.}}</button>
+  {{end}}
+</div>
+
+<div class="card-list" id="cards">
+{{range .Cards}}
+<div class="card{{if .Pinned}} pinned{{end}}" data-type="{{.CardType}}" data-search="{{.SearchText}}">
+  <div class="card-top">
+    <span class="card-glyph">{{.Glyph}}</span>
+    <span class="card-type">{{.CardType}}</span>
+    {{if gt .UseCount 0}}<span class="card-use">{{.UseCount}}×</span>{{end}}
+  </div>
+  {{if .Title}}<div class="card-title">{{.Title}}</div>{{end}}
+
+  {{if eq .CardType "snippet"}}
+  <div class="snippet-block">
+    <button class="copy-btn" onclick="copyText(this)">copy</button>
+    <pre>{{.Body}}</pre>
+  </div>
+  {{else if eq .CardType "checklist"}}
+  <div class="card-body">{{.Description}}</div>
+  <ul class="checklist" data-card-id="{{.ID}}">
+    {{range $i, $step := .Steps}}
+    <li>
+      <div class="check-box{{if $step.Done}} checked{{end}}" onclick="toggleCheck(this)" data-idx="{{$i}}"></div>
+      <span class="check-text{{if $step.Done}} done{{end}}">{{$step.Text}}</span>
+    </li>
+    {{end}}
+  </ul>
+  <div class="progress-bar"><div class="progress-fill" style="width:{{.Progress}}%"></div></div>
+  {{else if eq .CardType "template"}}
+  <div class="card-body">{{.Description}}</div>
+  <form class="template-form" data-template="{{.TemplateBody}}" onsubmit="return false">
+    {{range .Slots}}
+    <div class="template-field">
+      <label>{{.Name}}</label>
+      <input type="text" data-slot="{{.Name}}" placeholder="{{.Name}}{{if .Default}} ({{.Default}}){{end}}" oninput="updateTemplate(this)">
+    </div>
+    {{end}}
+    <div class="template-output">
+      <button class="template-copy-btn" onclick="copyTemplate(this)">copy filled template</button>
+    </div>
+  </form>
+  {{else if eq .CardType "decision"}}
+  <div class="decision-grid">
+    {{if .Decision.Chose}}<div class="decision-row"><div class="decision-label">Chose</div><div class="decision-value">{{.Decision.Chose}}</div></div>{{end}}
+    {{if .Decision.Why}}<div class="decision-row"><div class="decision-label">Why</div><div class="decision-value">{{.Decision.Why}}</div></div>{{end}}
+    {{if .Decision.Rejected}}<div class="decision-row"><div class="decision-label">Rejected</div><div class="decision-value decision-rejected">{{range $i, $r := .Decision.Rejected}}{{if $i}}, {{end}}{{$r}}{{end}}</div></div>{{end}}
+  </div>
+  {{if .Body}}<div class="card-body" style="margin-top:8px">{{.Body}}</div>{{end}}
+  {{else if eq .CardType "link"}}
+  {{if .Body}}<div class="card-body">{{.Body}}</div>{{end}}
+  <a class="link-target" href="{{.LinkURL}}" target="_blank" rel="noopener">
+    <span class="link-url">{{.LinkURL}}</span>
+    <span class="link-arrow">↗</span>
+  </a>
+  {{else}}
+  <div class="card-body">{{.Body}}</div>
+  {{end}}
+
+  {{if .Tags}}
+  <div class="card-tags">
+    {{range .Tags}}<span class="tag">#{{.}}</span>{{end}}
+  </div>
+  {{end}}
+</div>
+{{end}}
+</div>
+
+<div class="empty-state" id="empty" style="display:none">no matching cards</div>
+
+<script>
+(function(){
+  const cards=document.querySelectorAll('.card');
+  const chips=document.querySelectorAll('.filter-chip');
+  const search=document.getElementById('search');
+  const empty=document.getElementById('empty');
+  let activeType='all';
+
+  function applyFilters(){
+    const q=search.value.toLowerCase().trim();
+    let visible=0;
+    cards.forEach(c=>{
+      const typeMatch=activeType==='all'||c.dataset.type===activeType;
+      const searchMatch=!q||c.dataset.search.toLowerCase().includes(q);
+      c.style.display=(typeMatch&&searchMatch)?'':'none';
+      if(typeMatch&&searchMatch)visible++;
+    });
+    empty.style.display=visible?'none':'block';
+  }
+
+  chips.forEach(chip=>{
+    chip.addEventListener('click',()=>{
+      chips.forEach(c=>c.classList.remove('active'));
+      chip.classList.add('active');
+      activeType=chip.dataset.type;
+      applyFilters();
+    });
+  });
+
+  search.addEventListener('input',applyFilters);
+})();
+
+function copyText(btn){
+  const pre=btn.parentElement.querySelector('pre');
+  navigator.clipboard.writeText(pre.textContent).then(()=>{
+    btn.textContent='copied!';
+    setTimeout(()=>btn.textContent='copy',1500);
+  });
+}
+
+function toggleCheck(box){
+  box.classList.toggle('checked');
+  const span=box.nextElementSibling;
+  span.classList.toggle('done');
+  const list=box.closest('.checklist');
+  const boxes=list.querySelectorAll('.check-box');
+  const done=[...boxes].filter(b=>b.classList.contains('checked')).length;
+  const bar=list.nextElementSibling.querySelector('.progress-fill');
+  bar.style.width=Math.round((done/boxes.length)*100)+'%';
+}
+
+function updateTemplate(input){
+  const form=input.closest('.template-form');
+  const tmpl=form.dataset.template;
+  let filled=tmpl;
+  form.querySelectorAll('input[data-slot]').forEach(inp=>{
+    const re=new RegExp('\\$\\{'+inp.dataset.slot+'\\}','g');
+    filled=filled.replace(re,inp.value||'${'+inp.dataset.slot+'}');
+  });
+  form._filled=filled;
+}
+
+function copyTemplate(btn){
+  const form=btn.closest('.template-form');
+  const text=form._filled||form.dataset.template;
+  navigator.clipboard.writeText(text).then(()=>{
+    btn.textContent='copied!';
+    setTimeout(()=>btn.textContent='copy filled template',1500);
+  });
+}
+</script>
+</body>
+</html>