fix(viewer): serve static js with script mime type

README.md

@@ -2,6 +2,8 @@
 
 `chart` is a small read-only web viewer for Reanimator hardware JSON snapshots.
 
+Version: `1.0`
+
 It is intended to be embedded into other Go applications that collect audit data in different ways and want a consistent HTML view of the resulting Reanimator JSON.
 
 ## Integration

bible-local/architecture/data-model.md

@@ -43,7 +43,8 @@ For array sections:
 
 ## Special Field Handling
 
-- `status` is rendered as a colored badge
+- `status` is rendered as a colored badge; in table sections it may collapse to an icon-only presentation column
+- `severity` may render as both its source text field and a separate icon-only leading table column
 - arrays such as `mac_addresses` may be rendered as line-separated values or badges inside one cell
 - nested values such as `status_history` may be rendered in expandable detail blocks inside one cell
 

bible-local/architecture/runtime-flows.md

@@ -15,7 +15,16 @@
 1. read the raw `status` value from the payload
 2. normalize only for presentation matching (`OK`, `Warning`, `Critical`, `Unknown`, `Empty`)
 3. apply status badge class
-4. do not change the raw value shown to the user
+4. in dense table layouts, render `status` as an icon-only column with an empty header when it improves scanning
+5. preserve the raw status value in accessible labeling even when the visible cell shows only a pictogram
+
+## Severity Presentation Flow
+
+1. read the raw `severity` value from the payload
+2. map the raw value only to a presentation glyph/color class
+3. when a table includes `severity`, add a leftmost icon-only column for it
+4. keep the original textual `severity` column visible in the table
+5. preserve the raw severity value in accessible labeling for the pictogram cell
 
 ## Unknown Field Invariant
 

bible-local/architecture/ui-information-architecture.md

@@ -60,4 +60,6 @@ Preferred order:
 
 - tables must remain readable on desktop and mobile
 - section navigation must work without JavaScript
-- color must not be the only status indicator; always show text
+- color must not be the only status indicator; pair it with a shape or glyph
+- table `status` columns may use icon-only cells and an empty header when that improves scanability, but the raw status value must remain available via accessible labeling
+- table sections with `severity` may add a separate leftmost icon-only column for fast scanning while keeping the textual `severity` field visible

bible-local/decisions/2026-04-22-status-columns-use-icon-only-presentation.md

@@ -0,0 +1,31 @@
+# Decision: Status Table Columns Use Icon-Only Presentation
+
+**Date:** 2026-04-22
+**Status:** active
+
+## Context
+
+Dense hardware tables frequently repeat the same `status` values.
+
+Showing a textual `status` header and textual badges in every row wastes horizontal space and reduces scan speed, especially in sensor subtables.
+
+The viewer still needs to keep status meaning explicit and avoid relying on color alone.
+
+## Decision
+
+Table columns named `status` render as compact icon-only columns.
+
+This includes:
+
+- an empty visible header cell for the `status` column
+- a minimal-width table column sized for the pictogram
+- a glyph plus color to distinguish state
+- accessible labeling that preserves the raw status value without showing repeated text in the cell
+
+Object sections may continue to show status as a regular field value.
+
+## Consequences
+
+- Table layouts gain more room for source fields such as `name`, `model`, and `location`.
+- Status meaning remains available to assistive technologies even when the visible cell is icon-only.
+- Future table UI work should keep `status` compact instead of reintroducing wide text badges by default.

viewer/handler_test.go

@@ -82,3 +82,22 @@ func TestStandaloneHandlerRootShowsUploadForm(t *testing.T) {
 		t.Fatalf("expected standalone handler root to include upload form")
 	}
 }
+
+func TestStaticJSUsesScriptContentType(t *testing.T) {
+	handler := NewHandler(HandlerOptions{Title: "Reanimator Chart"})
+
+	req := httptest.NewRequest(http.MethodGet, "/static/view.js", nil)
+	rec := httptest.NewRecorder()
+	handler.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status = %d, want %d", rec.Code, http.StatusOK)
+	}
+	contentType := rec.Header().Get("Content-Type")
+	if !strings.Contains(contentType, "javascript") {
+		t.Fatalf("Content-Type = %q, want javascript MIME type", contentType)
+	}
+	if !strings.Contains(rec.Body.String(), "DOMContentLoaded") {
+		t.Fatalf("expected static JS asset body to be served")
+	}
+}

viewer/render.go

@@ -49,6 +49,7 @@ var hiddenTableFields = map[string]struct{}{
 const vendorDeviceIDField = "ven:dev"
 
 var commonPreferredColumns = []string{
+	"severity_icon",
 	"status",
 	"slot",
 	"location",
@@ -333,6 +334,9 @@ func collectColumns(section string, rows []map[string]any) []string {
 			}
 			seen[key] = struct{}{}
 		}
+		if hasSeverity(row) {
+			seen["severity_icon"] = struct{}{}
+		}
 		if hasVendorDeviceID(row) {
 			seen[vendorDeviceIDField] = struct{}{}
 		}
@@ -494,6 +498,9 @@ func formatStringValue(value string) string {
 }
 
 func formatRowValue(column string, row map[string]any) string {
+	if column == "severity_icon" {
+		return strings.TrimSpace(formatValue(row["severity"]))
+	}
 	if column == vendorDeviceIDField {
 		return formatVendorDeviceID(row)
 	}
@@ -589,6 +596,10 @@ func hasVendorDeviceID(value map[string]any) bool {
 	return formatVendorDeviceID(value) != ""
 }
 
+func hasSeverity(value map[string]any) bool {
+	return strings.TrimSpace(formatValue(value["severity"])) != ""
+}
+
 func isHiddenTableField(section string, key string) bool {
 	if isHiddenField(key) {
 		return true

viewer/render_test.go

@@ -47,6 +47,18 @@ func TestRenderHTMLIncludesKnownSectionsAndFields(t *testing.T) {
 			t.Fatalf("expected rendered html to contain %q", needle)
 		}
 	}
+	for _, needle := range []string{
+		`<th class="status-column" aria-label="status"></th>`,
+		`<td class="status-column">`,
+		`<span class="status-badge status-ok" role="img" aria-label="OK" title="OK"></span>`,
+	} {
+		if !strings.Contains(text, needle) {
+			t.Fatalf("expected rendered html to contain %q", needle)
+		}
+	}
+	if strings.Contains(text, "<th>status</th>") {
+		t.Fatalf("expected status table headers to be rendered without visible text")
+	}
 
 	if strings.Contains(text, "2026-03-15T12:00:00Z") {
 		t.Fatalf("expected RFC3339 timestamp to be rendered in human-readable form")
@@ -266,6 +278,12 @@ func TestRenderHTMLGroupsPCIeDevicesByClass(t *testing.T) {
 	if strings.Contains(text, "<th>device_class</th>") {
 		t.Fatalf("expected device_class column to be hidden from PCIe tables")
 	}
+	if !strings.Contains(text, `<th class="status-column" aria-label="status"></th>`) {
+		t.Fatalf("expected grouped PCIe tables to render compact status header cells")
+	}
+	if !strings.Contains(text, `<span class="status-badge status-warning" role="img" aria-label="Warning" title="Warning"></span>`) {
+		t.Fatalf("expected grouped PCIe tables to render icon-only status cells with accessible labels")
+	}
 	if strings.Index(text, "<h3>Display controller</h3>") > strings.Index(text, "<h3>Network controller</h3>") {
 		t.Fatalf("expected PCIe class groups to be sorted by device_class")
 	}
@@ -307,10 +325,17 @@ func TestRenderHTMLAddsSeverityFilterForEventLogs(t *testing.T) {
 		`<option value="info">Info</option>`,
 		`data-severity="critical"`,
 		`data-severity="info"`,
+		`<th class="status-column" aria-label="severity"></th>`,
+		`<span class="status-badge severity-info" role="img" aria-label="Info" title="Info"></span>`,
+		`<span class="status-badge severity-critical" role="img" aria-label="Critical" title="Critical"></span>`,
+		`<th>severity</th>`,
 		"/static/view.js",
 	} {
 		if !strings.Contains(text, needle) {
 			t.Fatalf("expected rendered html to contain %q", needle)
 		}
 	}
+	if strings.Contains(text, "<th>severity_icon</th>") {
+		t.Fatalf("expected synthetic severity icon column header to remain visually empty")
+	}
 }

web/embed.go

@@ -4,6 +4,7 @@ import (
 	"embed"
 	"html/template"
 	"io/fs"
+	"mime"
 	"net/http"
 	"strings"
 )
@@ -12,12 +13,19 @@ import (
 var content embed.FS
 
 var pageTemplate = template.Must(template.New("view.html").Funcs(template.FuncMap{
-	"statusClass": statusClass,
-	"joinLines":   joinLines,
+	"statusClass":   statusClass,
+	"severityClass": severityClass,
+	"joinLines":     joinLines,
 }).ParseFS(content, "templates/view.html"))
 
 var uploadTemplate = template.Must(template.New("upload.html").ParseFS(content, "templates/upload.html"))
 
+func init() {
+	if err := mime.AddExtensionType(".js", "text/javascript; charset=utf-8"); err != nil {
+		panic(err)
+	}
+}
+
 func Render(data any) ([]byte, error) {
 	var out strings.Builder
 	if err := pageTemplate.ExecuteTemplate(&out, "view.html", data); err != nil {
@@ -59,6 +67,23 @@ func statusClass(value string) string {
 	}
 }
 
+func severityClass(value string) string {
+	switch strings.ToUpper(strings.TrimSpace(value)) {
+	case "INFO", "INFORMATIONAL":
+		return "severity-info"
+	case "WARNING", "WARN":
+		return "severity-warning"
+	case "ERROR":
+		return "severity-error"
+	case "CRITICAL", "FATAL":
+		return "severity-critical"
+	case "DEBUG", "TRACE":
+		return "severity-debug"
+	default:
+		return "severity-unknown"
+	}
+}
+
 func joinLines(value string) []string {
 	if strings.TrimSpace(value) == "" {
 		return nil

web/static/view.css

@@ -365,6 +365,14 @@ body {
   color: var(--muted);
 }
 
+.data-table .status-column {
+  width: 1%;
+  white-space: nowrap;
+  text-align: center;
+  padding-left: 12px;
+  padding-right: 12px;
+}
+
 /* ── Status ──────────────────────────────────────── */
 
 .status-badge {
@@ -385,6 +393,13 @@ body {
 .status-unknown::before  { content: '?'; color: rgba(0, 0, 0, 0.4); }
 .status-empty::before    { content: '–'; color: rgba(0, 0, 0, 0.3); }
 
+.severity-info::before     { content: 'i'; color: #2185d0; }
+.severity-warning::before  { content: '!'; color: #f2711c; }
+.severity-error::before    { content: '×'; color: #db2828; }
+.severity-critical::before { content: '✗'; color: #a33333; }
+.severity-debug::before    { content: '•'; color: rgba(0, 0, 0, 0.55); }
+.severity-unknown::before  { content: '?'; color: rgba(0, 0, 0, 0.4); }
+
 /* ── Responsive ──────────────────────────────────── */
 
 @media (max-width: 720px) {

web/templates/view.html

@@ -81,7 +81,7 @@
             <thead>
               <tr>
                 {{ range .Columns }}
-                <th>{{ . }}</th>
+                <th{{ if or (eq . "status") (eq . "severity_icon") }} class="status-column"{{ end }}{{ if eq . "status" }} aria-label="status"{{ end }}{{ if eq . "severity_icon" }} aria-label="severity"{{ end }}>{{ if and (ne . "status") (ne . "severity_icon") }}{{ . }}{{ end }}</th>
                 {{ end }}
               </tr>
             </thead>
@@ -90,10 +90,12 @@
               <tr data-severity-row="true" data-severity="{{ .Severity }}">
                 {{ $row := . }}
                 {{ range $section.Columns }}
-                <td>
+                <td{{ if or (eq . "status") (eq . "severity_icon") }} class="status-column"{{ end }}>
                   {{ $value := index $row.Cells . }}
                   {{ if eq . "status" }}
-                  <span class="status-badge {{ statusClass $value }}">{{ $value }}</span>
+                  <span class="status-badge {{ statusClass $value }}" role="img" aria-label="{{ $value }}" title="{{ $value }}"></span>
+                  {{ else if eq . "severity_icon" }}
+                  <span class="status-badge {{ severityClass $value }}" role="img" aria-label="{{ $value }}" title="{{ $value }}"></span>
                   {{ else }}
                     {{ range joinLines $value }}
                     <div>{{ . }}</div>
@@ -134,7 +136,7 @@
               <thead>
                 <tr>
                   {{ range .Columns }}
-                  <th>{{ . }}</th>
+                  <th{{ if or (eq . "status") (eq . "severity_icon") }} class="status-column"{{ end }}{{ if eq . "status" }} aria-label="status"{{ end }}{{ if eq . "severity_icon" }} aria-label="severity"{{ end }}>{{ if and (ne . "status") (ne . "severity_icon") }}{{ . }}{{ end }}</th>
                   {{ end }}
                 </tr>
               </thead>
@@ -143,10 +145,12 @@
                 <tr data-severity-row="true" data-severity="{{ .Severity }}">
                   {{ $row := . }}
                   {{ range $group.Columns }}
-                  <td>
+                  <td{{ if or (eq . "status") (eq . "severity_icon") }} class="status-column"{{ end }}>
                     {{ $value := index $row.Cells . }}
                     {{ if eq . "status" }}
-                    <span class="status-badge {{ statusClass $value }}">{{ $value }}</span>
+                    <span class="status-badge {{ statusClass $value }}" role="img" aria-label="{{ $value }}" title="{{ $value }}"></span>
+                    {{ else if eq . "severity_icon" }}
+                    <span class="status-badge {{ severityClass $value }}" role="img" aria-label="{{ $value }}" title="{{ $value }}"></span>
                     {{ else }}
                       {{ range joinLines $value }}
                       <div>{{ . }}</div>