feat(collections): smart (dynamic) collections — rules evaluated live at render

Type is DERIVED, not stored: a saved ruleset makes a collection SMART,
no rules = STATIC (stored collection_items links, unchanged behavior).
No schema change — collections.auto_assign_rules JSONB already carried
the config; user's decision 2026-10-14 (handoff: live-at-render, not
refresh-on-scan; create-time Static/Smart toggle; v1 NO hybrid).

- Rule gains an enabled flag (absent = enabled, legacy rules unaffected).
- Rule CRUD: POST/PUT(DELETE) /api/collections/:id/rules[/:ruleId] — the
  survivor dead effort of the rules-builder UI finally has real
  endpoints (rules were never editable after creation; nothing ever
  re-evaluated them). First rule converts a user collection to smart;
  removing the last reverts it to static. UpdateCollectionRulesJSON
  edits ONLY the rules doc so rule CRUD cannot clobber metadata.
- Live evaluation: candidates from GetVisibleLiveMediaForRules —
  visible-library set (family lens enforced at source) + archived IS
  NULL AND missing_scan_count = 0 — any enabled rule matches, title
  order. Zero refresh hooks by design: always current by construction.
- Membership mutations (add/remove/bulk-add) are 400 on smart — v1 no
  hybrid; collection_items.excluded stays the reserved future hook.
- Rules builder page (/collections/:id/rules) first time ever routable;
  templ whole-attribute interpolation ("{ expr }" inside a quoted attr
  value is literal text, as theme-{ user.Theme } silently proved).
- UI: create modal Static/⚡Smart cards (smart create redirects into the
  rules builder), ⚡ badge + real per-card counts on the grid (smart =
  live matches, static = stored-link count), smart detail renders
  matched books with no hand-pick actions + an Edit Rules button.
- API: GET /:id gains is_smart + live books; GET /: keeps the Android
  app's default exclusion, include_auto=true surfaces smart rows with
  live counts; TestRules previews against the SAME candidates the live
  render uses (visible + live, was raw first-1000).
- FIXED pre-existing regression from 7ce7321: static collection detail
  with NO library_id returned zero books — QueryType != '' caught user
  rows ('filter' default) and routed them to dashboard sections that
  never contain them; now only real system query types go there
  (handlers + SSR). App-visible symptom: /api/collections/:id without
  library_id came back books:[] for every static collection.

Tests: collections_smart_test.go (conversion, disabled rules, mutation
guards, revert-to-static, validation, system-collection prohibition,
include_auto semantics). Full offline integration suite PASS.

templates/collection_modal_templ.go

@@ -148,14 +148,14 @@ func CollectionModal(collection CollectionData) templ.Component {
 				return templ_7745c5c3_Err
 			}
 		} else {
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 14, "<form hx-post=\"/api/collections\" hx-redirect=\"/collections\"><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Name</label> <input type=\"text\" name=\"name\" required class=\"input\" placeholder=\"My Reading List\"></div><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Description</label> <textarea name=\"description\" class=\"input\" placeholder=\"Optional description\" rows=\"3\"></textarea></div><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Icon</label> <input type=\"text\" id=\"icon-search\" class=\"input mb-2\" placeholder=\"Search or type emoji...\" maxlength=\"4\" @input=\"filterIcons($event.target.value)\" @focus=\"showAllIcons()\"> <input type=\"hidden\" name=\"icon\" id=\"collection-icon\" value=\"")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 14, "<form hx-post=\"/api/collections\" hx-redirect=\"/collections\"><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Type</label><div class=\"grid grid-cols-2 gap-2\"><label class=\"relative cursor-pointer\"><input type=\"radio\" name=\"collection_type\" value=\"static\" checked class=\"peer sr-only\"><div class=\"p-3 rounded-lg border text-center peer-checked:border-blue-500\" style=\"background-color: var(--bg-primary); border-color: var(--border);\"><span class=\"font-semibold text-sm\" style=\"color: var(--text-primary)\">Static</span><p class=\"text-xs mt-1\" style=\"color: var(--text-secondary)\">Pick books by hand</p></div></label> <label class=\"relative cursor-pointer\"><input type=\"radio\" name=\"collection_type\" value=\"smart\" class=\"peer sr-only\"><div class=\"p-3 rounded-lg border text-center peer-checked:border-blue-500 peer-checked:ring-2 peer-checked:ring-blue-400\" style=\"background-color: var(--bg-primary); border-color: var(--border);\"><span class=\"font-semibold text-sm\" style=\"color: var(--text-primary)\">⚡ Smart</span><p class=\"text-xs mt-1\" style=\"color: var(--text-secondary)\">Match books by rules — always live</p></div></label></div></div><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Name</label> <input type=\"text\" name=\"name\" required class=\"input\" placeholder=\"My Reading List\"></div><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Description</label> <textarea name=\"description\" class=\"input\" placeholder=\"Optional description\" rows=\"3\"></textarea></div><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Icon</label> <input type=\"text\" id=\"icon-search\" class=\"input mb-2\" placeholder=\"Search or type emoji...\" maxlength=\"4\" @input=\"filterIcons($event.target.value)\" @focus=\"showAllIcons()\"> <input type=\"hidden\" name=\"icon\" id=\"collection-icon\" value=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 			var templ_7745c5c3_Var8 string
 			templ_7745c5c3_Var8, templ_7745c5c3_Err = templ.ResolveAttributeValue(collection.Icon)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `collection_modal.templ`, Line: 116, Col: 83}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `collection_modal.templ`, Line: 135, Col: 83}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var8)
 			if templ_7745c5c3_Err != nil {