Restructure chat service, web routes, and add test suite

Split monolithic chat service into modular structure with Matrix client
support, extract web server into per-resource route modules, introduce
bootstrap/main-loop separation, and add comprehensive vitest coverage
across services, repositories, and utilities. Adds project docs and
CLAUDE.md agent instructions.

src/reddit/api.ts

@@ -13,6 +13,7 @@ export interface RedditPost {
   permalink: string;
   thumbnail: string;
   is_self: boolean;
+  selftext?: string;
   post_hint?: string;
   preview?: {
     images: Array<{
@@ -25,6 +26,25 @@ export interface RedditPost {
   spoiler: boolean;
 }
 
+// Extracts URL-ish tokens (with or without scheme) and returns the first
+// domain match. Matches `host` or any subdomain (`*.host`), case-insensitive.
+export function findSellerDomain(text: string, domains: string[]): string | null {
+  if (!text || domains.length === 0) return null;
+  const normalized = text.toLowerCase();
+  const urlRegex = /(?:https?:\/\/|(?<![\w.@])(?=[a-z0-9-]+\.[a-z]))([a-z0-9.-]+\.[a-z]{2,})(?:[/?#][^\s)]*)?/gi;
+  const hosts: string[] = [];
+  for (const m of normalized.matchAll(urlRegex)) {
+    hosts.push(m[1].replace(/\.+$/, ''));
+  }
+  for (const host of hosts) {
+    for (const domain of domains) {
+      const d = domain.toLowerCase();
+      if (host === d || host.endsWith('.' + d)) return domain;
+    }
+  }
+  return null;
+}
+
 export class RedditApiClient {
   private client: AxiosInstance;
   private browserContext: BrowserContext | null = null;
@@ -62,7 +82,7 @@ export class RedditApiClient {
     }
   }
 
-  async getNewPosts(subreddit: string, limit = 25): Promise<RedditPost[]> {
+  async getNewPosts(subreddit: string, limit = 25, type: 'image' | 'chat' = 'image'): Promise<RedditPost[]> {
     try {
       const cookieHeader = await this.getCookieHeader();
       const headers: Record<string, string> = {};
@@ -77,9 +97,9 @@ export class RedditApiClient {
 
       const posts: RedditPost[] = response.data.data.children
         .map((child: { data: RedditPost }) => child.data)
-        .filter((post: RedditPost) => this.isValidPost(post));
+        .filter((post: RedditPost) => this.isValidPost(post, type));
 
-      this.logger.debug(`Fetched ${posts.length} valid image posts from r/${subreddit}`);
+      this.logger.debug(`Fetched ${posts.length} valid ${type} posts from r/${subreddit}`);
       return posts;
     } catch (error) {
       if (axios.isAxiosError(error)) {
@@ -101,17 +121,19 @@ export class RedditApiClient {
     }
   }
 
-  private isValidPost(post: RedditPost): boolean {
-    // Skip self posts (text only)
-    if (post.is_self) return false;
-
+  private isValidPost(post: RedditPost, type: 'image' | 'chat' = 'image'): boolean {
     // Skip deleted/removed authors
     if (post.author === '[deleted]' || post.author === 'AutoModerator') return false;
 
-    // Skip NSFW if we want to be safe (configurable later)
-    // if (post.over_18) return false;
+    if (type === 'chat') {
+      // Chat subs are text-driven. Require a title (always present) and
+      // ideally some self text — but allow title-only since some tags live
+      // in the title alone (e.g. "[25F] up late, dm me").
+      return true;
+    }
 
-    // Check if it's an image post
+    // image type:
+    if (post.is_self) return false;
     return this.hasImage(post);
   }
 
@@ -180,8 +202,12 @@ export class RedditApiClient {
     return url.replace(/&amp;/g, '&');
   }
 
-  async isSellerProfile(username: string, sellerKeywords: string[]): Promise<boolean> {
-    if (sellerKeywords.length === 0) return false;
+  async isSellerProfile(
+    username: string,
+    sellerKeywords: string[],
+    sellerDomains: string[] = []
+  ): Promise<boolean> {
+    if (sellerKeywords.length === 0 && sellerDomains.length === 0) return false;
 
     try {
       const cookieHeader = await this.getCookieHeader();
@@ -210,7 +236,17 @@ export class RedditApiClient {
       for (const keyword of sellerKeywords) {
         if (textToCheck.includes(keyword.toLowerCase())) {
           this.logger.info(
-            `u/${username} flagged as seller profile (matched: "${keyword}")`
+            `u/${username} flagged as seller profile (matched keyword: "${keyword}")`
+          );
+          return true;
+        }
+      }
+
+      if (sellerDomains.length > 0) {
+        const matchedDomain = findSellerDomain(textToCheck, sellerDomains);
+        if (matchedDomain) {
+          this.logger.info(
+            `u/${username} flagged as seller profile (matched domain: "${matchedDomain}")`
           );
           return true;
         }