Implement email support with per-user permission model (closes #2)

New modules:
- server/mailer.mjs: nodemailer transport wrapper
- server/mail_perms.mjs: runtime permission store, persisted to disk

New actions:
- send-email: checks (caller, to, topic) permission before sending
- set-mail-permission: grant/revoke permissions, gated by canApprove
- get-mail-permissions: list current permissions

Handler signature extended to handler(params, ctx) where ctx carries
caller, users, mail_perm_store and mailer_send. Existing handlers
ignore ctx so the change is backwards-compatible.

SMTP config lives in secrets.json under optional 'smtp' key.
Mail permissions path via --mail-perms or CONDUIT_MAIL_PERMS.

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

package-lock.json

@@ -1,14 +1,22 @@
 {
   "name": "claude-code-conduit",
-  "version": "0.1.0",
+  "version": "1.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "claude-code-conduit",
-      "version": "0.1.0",
+      "version": "1.0.0",
       "dependencies": {
-        "express": "^5.2.1"
+        "blessed": "^0.1.81",
+        "express": "^5.2.1",
+        "nodemailer": "^8.0.2"
+      },
+      "bin": {
+        "ccc-client": "bin/ccc-client.mjs",
+        "ccc-keygen": "bin/ccc-keygen.mjs",
+        "ccc-queue": "bin/ccc-queue.mjs",
+        "ccc-server": "bin/ccc-server.mjs"
       }
     },
     "node_modules/accepts": {
@@ -24,6 +32,18 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/blessed": {
+      "version": "0.1.81",
+      "resolved": "https://registry.npmjs.org/blessed/-/blessed-0.1.81.tgz",
+      "integrity": "sha512-LoF5gae+hlmfORcG1M5+5XZi4LBmvlXTzwJWzUlPryN/SJdSflZvROM2TwkT0GMpq7oqT48NRd4GS7BiVBc5OQ==",
+      "license": "MIT",
+      "bin": {
+        "blessed": "bin/tput.js"
+      },
+      "engines": {
+        "node": ">= 0.8.0"
+      }
+    },
     "node_modules/body-parser": {
       "version": "2.2.2",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-2.2.2.tgz",
@@ -517,6 +537,15 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/nodemailer": {
+      "version": "8.0.2",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-8.0.2.tgz",
+      "integrity": "sha512-zbj002pZAIkWQFxyAaqoxvn+zoIwRnS40hgjqTXudKOOJkiFFgBeNqjgD3/YCR12sZnrghWYBY+yP1ZucdDRpw==",
+      "license": "MIT-0",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/object-inspect": {
       "version": "1.13.4",
       "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.13.4.tgz",