fix: batch tag queries, inline edit, delete response, SPA catch-all, link glyph

- Fix N+1 tag query in List() with batched IN clause
- Add inline body editing in web detail pane (dblclick or e key)
- Delete API returns {result: "soft"|"hard"} with 200 instead of 204
- SPA handler serves index.html for all extensionless paths
- Link glyph changed from emoji 🔗 to unicode ↗ for terminal alignment
- Capture bar contrast and hover glow increased
- Comment on load-bearing "--" in root.go

web/style.css

@@ -92,22 +92,28 @@ nav {
 #capture-input {
     width: 100%;
     background: var(--bg);
-    border: 1px solid var(--border);
+    border: 1px solid var(--text-muted);
     color: var(--text);
     padding: 8px 12px;
     border-radius: var(--radius);
     font-family: var(--font-mono);
     font-size: 13px;
     outline: none;
-    transition: border-color 0.15s;
+    transition: border-color 0.15s, box-shadow 0.15s;
+}
+
+#capture-input:hover {
+    border-color: var(--accent-dim);
+    box-shadow: 0 0 0 1px var(--accent-dim);
 }
 
 #capture-input:focus {
     border-color: var(--accent);
+    box-shadow: 0 0 0 1px var(--accent);
 }
 
 #capture-input::placeholder {
-    color: var(--text-muted);
+    color: var(--text-dim);
 }
 
 /* Main layout */
@@ -273,6 +279,34 @@ main {
     margin-bottom: 16px;
     white-space: pre-wrap;
     word-break: break-word;
+    cursor: text;
+    border-radius: var(--radius);
+    padding: 4px 6px;
+    margin-left: -6px;
+    transition: background 0.1s;
+}
+
+.detail-body:hover {
+    background: var(--bg-hover);
+}
+
+.detail-body-edit {
+    display: block;
+    width: 100%;
+    min-height: 80px;
+    font-family: var(--font-sans);
+    font-size: 14px;
+    line-height: 1.7;
+    margin-bottom: 16px;
+    padding: 6px 8px;
+    background: var(--bg);
+    color: var(--text);
+    border: 1px solid var(--accent);
+    border-radius: var(--radius);
+    outline: none;
+    resize: vertical;
+    white-space: pre-wrap;
+    word-break: break-word;
 }
 
 .detail-tags {