docs: update CHANGELOG and CLAUDE.md for v1.2

- CHANGELOG: v1.2.0 entry covering Clear History, subreddit prompt
  fix, and silent 404 skip
- CLAUDE.md: added DELETE /api/opportunities route, updated
  SettingsClient description, updated keyword-generator note

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: dongzhang84

CHANGELOG.md

@@ -6,6 +6,18 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ---
 
+## [1.2.0] — 2026-03-25
+
+### Added
+- **Clear History** button in Settings (Danger Zone card) — shows an inline confirmation dialog before deleting all opportunities; displays "History cleared. Click Scan Now to find new opportunities." on success
+- `DELETE /api/opportunities` — deletes all Opportunity records for the current user (session auth); returns `{ success: true, deleted: N }`
+
+### Changed
+- **Subreddit generation prompt** updated to target end-user communities instead of defaulting to generic founder/indie hacker subreddits; niche-specific subreddits are now preferred (e.g. `r/shopify` over `r/entrepreneur`); founder communities (`r/entrepreneur`, `r/startups`, `r/sideproject`, `r/indiehackers`) are only included when the product explicitly targets founders or developers
+- **Reddit 404s are now silent** — `fetchSubredditPosts` no longer logs an error for nonexistent subreddits (HTTP 404); other non-2xx errors (403, 429, 5xx) still log as before
+
+---
+
 ## [1.1.0] — 2026-03-24
 
 ### Added

CLAUDE.md

@@ -136,6 +136,7 @@ app/
     onboarding/route.ts             POST — save-and-scan step: generates keywords, saves profile, triggers background refresh
     settings/route.ts               PATCH — update profile settings
     feedback/route.ts               POST — record opportunity relevance feedback
+    opportunities/route.ts          DELETE — delete all opportunities for the current user
     opportunities/[id]/reply/route.ts  POST — mark opportunity as replied
     opportunities/refresh/route.ts  POST — on-demand scan for the logged-in user (session auth)
     opportunities/count/route.ts    GET — returns opportunity count for polling
@@ -145,7 +146,7 @@ components/
   OpportunityCard.tsx               Individual opportunity with action buttons
   ReplyModal.tsx                    Shadcn Dialog with suggested reply variations
   BuyModal.tsx                      DISABLED stub — renders null (Stripe disabled)
-  SettingsClient.tsx                Client: all settings forms + Scan Now button
+  SettingsClient.tsx                Client: all settings forms + Scan Now + Clear History buttons
   StatsBar.tsx                      Opportunities / replies / skipped counters
   Header.tsx                        Top nav with email, settings link, logout
 
@@ -155,7 +156,7 @@ lib/
   supabase/client.ts                createBrowserSupabaseClient() for Client Components
   supabase/admin.ts                 Admin client (service role key)
   scorer.ts                         OpenAI scoring — relevance 0–100, intent level, replies
-  keyword-generator.ts              OpenAI keyword + subreddit generation from product desc (no targetCustomer)
+  keyword-generator.ts              OpenAI keyword + subreddit generation from product desc; subreddits target end-user communities, not founder/dev communities
   refresh-opportunities.ts          Shared fetch/score/save pipeline for a single user
   reddit.ts                         Reddit public .json API fetcher
   hn.ts                             HN Algolia API fetcher