feat: v1.0.0 — UX polish, security hardening, code quality

UI/UX:
- Bill detail page tab UI (Analysis / Timeline / Votes / Notes)
- Topic tag pills on bill detail and listing pages — filtered to known
  topics, clickable, properly labelled via shared lib/topics.ts
- Notes panel always-open in Notes tab; sign-in prompt for guests
- Collapsible sidebar with icon-only mode and localStorage persistence
- Bills page defaults to has-text filter enabled
- Follow mode dropdown transparency fix
- Favicon (Landmark icon, blue background)

Security:
- Fernet encryption for ntfy passwords at rest (app/core/crypto.py)
- Separate ENCRYPTION_SECRET_KEY env var; falls back to JWT derivation
- ntfy_password no longer returned in GET response — replaced with
  ntfy_password_set: bool; NotificationSettingsUpdate type for writes
- JWT_SECRET_KEY fail-fast on startup if using default placeholder
- get_optional_user catches (JWTError, ValueError) only, not Exception

Bug fixes & code quality:
- Dashboard N+1 topic query replaced with single OR query
- notification_utils.py topic follower N+1 replaced with batch query
- Note query in bill detail page gated on token (enabled: !!token)
- search.py max_length=500 guard against oversized queries
- CollectionCreate.validate_name wired up with @field_validator
- LLM_RATE_LIMIT_RPM default raised from 10 to 50

Authored by: Jack Levy

frontend/app/bills/page.tsx

@@ -5,21 +5,16 @@ import { useSearchParams } from "next/navigation";
 import { FileText, Search } from "lucide-react";
 import { useBills } from "@/lib/hooks/useBills";
 import { BillCard } from "@/components/shared/BillCard";
+import { TOPICS } from "@/lib/topics";
 
 const CHAMBERS = ["", "House", "Senate"];
-const TOPICS = [
-  "", "healthcare", "taxation", "defense", "education", "immigration",
-  "environment", "housing", "infrastructure", "technology", "agriculture",
-  "judiciary", "foreign-policy", "veterans", "social-security", "trade",
-  "budget", "energy", "banking", "transportation", "labor",
-];
 
 export default function BillsPage() {
   const searchParams = useSearchParams();
   const [q, setQ] = useState(searchParams.get("q") ?? "");
   const [chamber, setChamber] = useState(searchParams.get("chamber") ?? "");
   const [topic, setTopic] = useState(searchParams.get("topic") ?? "");
-  const [hasText, setHasText] = useState(false);
+  const [hasText, setHasText] = useState(true);
   const [page, setPage] = useState(1);
 
   // Sync URL params → state so tag/topic links work when already on this page
@@ -75,7 +70,7 @@ export default function BillsPage() {
           className="px-3 py-2 text-sm bg-card border border-border rounded-md focus:outline-none"
         >
           <option value="">All Topics</option>
-          {TOPICS.slice(1).map((t) => <option key={t} value={t}>{t}</option>)}
+          {TOPICS.map((t) => <option key={t.tag} value={t.tag}>{t.label}</option>)}
         </select>
         <button
           onClick={() => { setHasText((v) => !v); setPage(1); }}