refactor: separate Feed domain state from persistence DTO

Move four DDD tensions on the Feed aggregate to ground:

- #1 The aggregate now holds a domain FeedState (camelCase) instead of the
  snake_case FeedConfig DTO; infrastructure/feed-mapper.ts owns the
  FeedState<->FeedConfig/FeedListItem translation as the sole snake_case site
  outside the HTTP edge.
- #3 Replace the edit() recomputeExpiry control flag with a Lifetime VO:
  passing a lifetime recomputes expiry, omitting it preserves the current one
  (the dashboard quick-edit path).
- #4 Domain events carry their own feedId; dispatchFeedEvents centralizes the
  drain+dispatch in the application layer (no more manual pullEvents at call
  sites), keeping infra->application dependency direction intact.
- #6 Rename FeedId.fromTrusted to FeedId.unchecked to make the absence of
  revalidation explicit.

Adds Lifetime + feed-mapper round-trip tests. 353 tests green, tsc clean,
wrangler dry-run OK. Docs (CLAUDE.md) synced.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/routes/admin/emails.tsx

@@ -158,7 +158,7 @@ emailsRouter.get("/feeds/:feedId/emails", async (c) => {
   const message = c.req.query("message");
   const count = Number(c.req.query("count") || "0");
 
-  const id = FeedId.fromTrusted(feedId);
+  const id = FeedId.unchecked(feedId);
   const feedConfig = await repo.getConfig(id);
   const feedMetadata = await repo.getMetadata(id);
 
@@ -656,7 +656,7 @@ emailsRouter.post("/emails/:emailKey/delete", async (c) => {
       return c.text("Feed ID is required", 400);
     }
 
-    const feed = await repo.load(FeedId.fromTrusted(feedId));
+    const feed = await repo.load(FeedId.unchecked(feedId));
 
     await repo.deleteEmail(emailKey);
     if (feed) {
@@ -691,7 +691,7 @@ emailsRouter.post("/feeds/:feedId/emails/bulk-delete", async (c) => {
     (c.req.header("Accept") || "").includes("application/json");
 
   try {
-    const feed = await repo.load(FeedId.fromTrusted(feedId));
+    const feed = await repo.load(FeedId.unchecked(feedId));
 
     if (!feed) {
       return wantsJson

src/routes/admin/feeds.tsx

@@ -153,7 +153,7 @@ feedsRouter.get("/:feedId/edit", async (c) => {
   const feedId = c.req.param("feedId");
 
   const feedConfig = await FeedRepository.from(env).getConfig(
-    FeedId.fromTrusted(feedId),
+    FeedId.unchecked(feedId),
   );
 
   if (!feedConfig) {
@@ -335,7 +335,7 @@ feedsRouter.post("/:feedId/edit", async (c) => {
       blockedSenders,
     });
 
-    const result = await editFeed(env, FeedId.fromTrusted(feedId), {
+    const result = await editFeed(env, FeedId.unchecked(feedId), {
       title: parsedData.title,
       description: parsedData.description,
       language: parsedData.language,
@@ -365,7 +365,7 @@ feedsRouter.post("/:feedId/edit", async (c) => {
 feedsRouter.post("/:feedId/sender-filter", async (c) => {
   const env = c.env;
   const feedId = c.req.param("feedId");
-  const id = FeedId.fromTrusted(feedId);
+  const id = FeedId.unchecked(feedId);
   const repo = FeedRepository.from(env);
 
   const body = await c.req.json().catch(() => null);
@@ -422,7 +422,7 @@ feedsRouter.post("/:feedId/delete", async (c) => {
   const wantsJson = (c.req.header("Accept") || "").includes("application/json");
 
   try {
-    await deleteFeedRecord(env, FeedId.fromTrusted(feedId), (p) =>
+    await deleteFeedRecord(env, FeedId.unchecked(feedId), (p) =>
       waitUntilSafe(c, p),
     );
 
@@ -460,7 +460,7 @@ feedsRouter.post("/:feedId/purge", async (c) => {
 
     const step = await purgeFeedKeysStep(
       emailStorage,
-      FeedId.fromTrusted(feedId),
+      FeedId.unchecked(feedId),
       {
         cursor,
         limit,
@@ -522,7 +522,7 @@ feedsRouter.post("/bulk-delete", async (c) => {
 
       for (const feedId of parsedFeedIds) {
         try {
-          const id = FeedId.fromTrusted(feedId);
+          const id = FeedId.unchecked(feedId);
           // Read unsubscribe URLs before the feed metadata is deleted.
           const urls = await collectUnsubscribeUrls(emailStorage, id);
           const result = await deleteFeedFastDetailed(emailStorage, id);
@@ -606,7 +606,7 @@ feedsRouter.post("/bulk-delete", async (c) => {
 
     for (const feedId of parsedFeedIds) {
       try {
-        const id = FeedId.fromTrusted(feedId);
+        const id = FeedId.unchecked(feedId);
         // Read unsubscribe URLs before the feed metadata is deleted.
         const urls = await collectUnsubscribeUrls(emailStorage, id);
         const result = await deleteFeedFastDetailed(emailStorage, id);