fix(review): close 5 follow-up gaps from Stage 6 audit re-review

- F-T-003 actually closed: clients/typescript/src/subscribe.ts now
  bounds the 401-refresh loop at 3 consecutive refusals, surfaces an
  onError describing the loop, and resets on any successful stream
  open. New test covers the cap. The Stage 2 dashboard fix only
  addressed adminRequest in dashboard/src/lib/api.ts; the originally-
  cited TS client file was untouched.

- users/invitations subtab dropped the redundant api.apps.get fetch
  the other 5 subtabs already shed in Stage 6.

- Queue visibility-timeout validator pulled out as
  validate_queue_visibility_timeout, with two thresholds: hard-reject
  below MIN_QUEUE_VISIBILITY_TIMEOUT_SECS (30s — catches typos), warn-
  log between MIN and SAFE_VISIBILITY_VS_EXEC_BUDGET_SECS (300s) so
  operators see when their visibility is below the dispatcher's
  per-message executor budget. Stage 6 only had the hard floor; the
  reviewer caught that a 60s handler still races a 30s visibility
  even after the floor. Four new unit tests cover none/above-safe/
  between/below-min.

- pic dead-letters count subcommand: cheap headless probe for
  unresolved DL totals, parallels the dashboard's badge query.

- pic dead-letters replay now has a happy-path integration test
  (replay_against_real_dl_row_succeeds): inserts a synthetic DL row
  directly via the rust-postgres sync driver (added as dev-dep),
  drives `pic dead-letters replay`, asserts the row is resolved with
  reason=replayed and count drops back to 0. Plus a count smoke test.

All 75 CLI integration tests + 16 TS client tests + 4 new
visibility-timeout unit tests pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Cargo.lock

@@ -8,7 +8,7 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d122413f284cf2d62fb1b7db97e02edb8cda96d769b16e443a4f6195e35662b0"
 dependencies = [
- "crypto-common",
+ "crypto-common 0.1.7",
  "generic-array",
 ]
 
@@ -20,7 +20,7 @@ checksum = "b169f7a6d4742236a0a00c541b845991d0ac43e546831af1249753ab4c3aa3a0"
 dependencies = [
  "cfg-if",
  "cipher",
- "cpufeatures",
+ "cpufeatures 0.2.17",
 ]
 
 [[package]]
@@ -139,7 +139,7 @@ checksum = "3c3610892ee6e0cbce8ae2700349fcf8f98adb0dbfbee85aec3c9179d29cc072"
 dependencies = [
  "base64ct",
  "blake2",
- "cpufeatures",
+ "cpufeatures 0.2.17",
  "password-hash",
 ]
 
@@ -324,7 +324,7 @@ version = "0.10.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46502ad458c9a52b69d4d4d32775c788b7a1b85e8bc9d482d92250fc0e3f8efe"
 dependencies = [
- "digest",
+ "digest 0.10.7",
 ]
 
 [[package]]
@@ -336,6 +336,15 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "block-buffer"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdd35008169921d80bc60d3d0ab416eecb028c4cd653352907921d95084790be"
+dependencies = [
+ "hybrid-array",
+]
+
 [[package]]
 name = "bstr"
 version = "1.12.1"
@@ -399,6 +408,17 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
+[[package]]
+name = "chacha20"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f8d983286843e49675a4b7a2d174efe136dc93a18d69130dd18198a6c167601"
+dependencies = [
+ "cfg-if",
+ "cpufeatures 0.3.0",
+ "rand_core 0.10.1",
+]
+
 [[package]]
 name = "chrono"
 version = "0.4.44"
@@ -421,7 +441,7 @@ checksum = "93698b29de5e97ad0ae26447b344c482a7284c737d9ddc5f9e52b74a336671bb"
 dependencies = [
  "chrono",
  "chrono-tz-build",
- "phf",
+ "phf 0.11.3",
 ]
 
 [[package]]
@@ -431,7 +451,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c088aee841df9c3041febbb73934cfc39708749bf96dc827e3359cd39ef11b1"
 dependencies = [
  "parse-zoneinfo",
- "phf",
+ "phf 0.11.3",
  "phf_codegen",
 ]
 
@@ -441,7 +461,7 @@ version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773f3b9af64447d2ce9850330c473515014aa235e6a783b02db81ff39e4a3dad"
 dependencies = [
- "crypto-common",
+ "crypto-common 0.1.7",
  "inout",
 ]
 
@@ -485,6 +505,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c8d4a3bb8b1e0c1050499d1815f5ab16d04f0959b233085fb31653fbfc9d98f9"
 
+[[package]]
+name = "cmov"
+version = "0.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c9ea0ac24bc397ab3c98583a3c9ba74fa56b09a4449bbe172b9b1ddb016027a"
+
 [[package]]
 name = "colorchoice"
 version = "1.0.5"
@@ -506,6 +532,12 @@ version = "0.9.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2459377285ad874054d797f3ccebf984978aa39129f6eafde5cdc8315b612f8"
 
+[[package]]
+name = "const-oid"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6ef517f0926dd24a1582492c791b6a4818a4d94e789a334894aa15b0d12f55c"
+
 [[package]]
 name = "const-random"
 version = "0.1.18"
@@ -551,6 +583,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "cpufeatures"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b2a41393f66f16b0823bb79094d54ac5fbd34ab292ddafb9a0456ac9f87d201"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "crc"
 version = "3.4.0"
@@ -609,6 +650,15 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "crypto-common"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce6e4c961d6cd6c9a86db418387425e8bdeaf05b3c8bc1411e6dca4c252f1453"
+dependencies = [
+ "hybrid-array",
+]
+
 [[package]]
 name = "ctr"
 version = "0.9.2"
@@ -618,6 +668,15 @@ dependencies = [
  "cipher",
 ]
 
+[[package]]
+name = "ctutils"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d5515a3834141de9eafb9717ad39eea8247b5674e6066c404e8c4b365d2a29e"
+dependencies = [
+ "cmov",
+]
+
 [[package]]
 name = "data-encoding"
 version = "2.11.0"
@@ -630,7 +689,7 @@ version = "0.7.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e7c1832837b905bbfb5101e07cc24c8deddf52f93225eee6ead5f4d63d53ddcb"
 dependencies = [
- "const-oid",
+ "const-oid 0.9.6",
  "pem-rfc7468",
  "zeroize",
 ]
@@ -662,12 +721,24 @@ version = "0.10.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
 dependencies = [
- "block-buffer",
+ "block-buffer 0.10.4",
- "const-oid",
+ "const-oid 0.9.6",
- "crypto-common",
+ "crypto-common 0.1.7",
  "subtle",
 ]
 
+[[package]]
+name = "digest"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1dd6dbb5841937940781866fa1281a1ff7bd3bf827091440879f9994983d5c2"
+dependencies = [
+ "block-buffer 0.12.0",
+ "const-oid 0.10.2",
+ "crypto-common 0.2.2",
+ "ctutils",
+]
+
 [[package]]
 name = "directories"
 version = "5.0.1"
@@ -769,6 +840,12 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "fallible-iterator"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4443176a9f2c162692bd3d352d745ef9413eec5782a80d8fd6f8a1ac692a07f7"
+
 [[package]]
 name = "fastrand"
 version = "2.4.1"
@@ -948,7 +1025,7 @@ dependencies = [
  "cfg-if",
  "js-sys",
  "libc",
- "wasi",
+ "wasi 0.11.1+wasi-snapshot-preview1",
  "wasm-bindgen",
 ]
 
@@ -975,6 +1052,7 @@ dependencies = [
  "cfg-if",
  "libc",
  "r-efi 6.0.0",
+ "rand_core 0.10.1",
  "wasip2",
  "wasip3",
 ]
@@ -1033,7 +1111,7 @@ version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7b5f8eb2ad728638ea2c7d47a21db23b7b58a72ed6a38256b8a1849f15fbbdf7"
 dependencies = [
- "hmac",
+ "hmac 0.12.1",
 ]
 
 [[package]]
@@ -1042,7 +1120,16 @@ version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6c49c37c09c17a53d937dfbb742eb3a961d65a994e6bcdcf37e7399d0cc8ab5e"
 dependencies = [
- "digest",
+ "digest 0.10.7",
+]
+
+[[package]]
+name = "hmac"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6303bc9732ae41b04cb554b844a762b4115a61bfaa81e3e83050991eeb56863f"
+dependencies = [
+ "digest 0.11.3",
 ]
 
 [[package]]
@@ -1110,6 +1197,15 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df3b46402a9d5adb4c86a0cf463f42e19994e3ee891101b1841f30a545cb49a9"
 
+[[package]]
+name = "hybrid-array"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9155a582abd142abc056962c29e3ce5ff2ad5469f4246b537ed42c5deba857da"
+dependencies = [
+ "typenum",
+]
+
 [[package]]
 name = "hyper"
 version = "1.9.0"
@@ -1501,7 +1597,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d89e7ee0cfbedfc4da3340218492196241d89eefb6dab27de5df917a6d2e78cf"
 dependencies = [
  "cfg-if",
- "digest",
+ "digest 0.10.7",
+]
+
+[[package]]
+name = "md-5"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69b6441f590336821bb897fb28fc622898ccceb1d6cea3fde5ea86b090c4de98"
+dependencies = [
+ "cfg-if",
+ "digest 0.11.3",
 ]
 
 [[package]]
@@ -1529,7 +1635,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "50b7e5b27aa02a74bac8c3f23f448f8d87ff11f92d3aac1a6ed369ee08cc56c1"
 dependencies = [
  "libc",
- "wasi",
+ "wasi 0.11.1+wasi-snapshot-preview1",
  "windows-sys 0.61.2",
 ]
 
@@ -1628,6 +1734,24 @@ dependencies = [
  "libm",
 ]
 
+[[package]]
+name = "objc2-core-foundation"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a180dd8642fa45cdb7dd721cd4c11b1cadd4929ce112ebd8b9f5803cc79d536"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "objc2-system-configuration"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7216bd11cbda54ccabcab84d523dc93b858ec75ecfb3a7d89513fa22464da396"
+dependencies = [
+ "objc2-core-foundation",
+]
+
 [[package]]
 name = "once_cell"
 version = "1.21.4"
@@ -1748,7 +1872,17 @@ version = "0.11.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1fd6780a80ae0c52cc120a26a1a42c1ae51b247a253e4e06113d23d2c2edd078"
 dependencies = [
- "phf_shared",
+ "phf_shared 0.11.3",
+]
+
+[[package]]
+name = "phf"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1562dc717473dbaa4c1f85a36410e03c047b2e7df7f45ee938fbef64ae7fadf"
+dependencies = [
+ "phf_shared 0.13.1",
+ "serde",
 ]
 
 [[package]]
@@ -1758,7 +1892,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aef8048c789fa5e851558d709946d6d79a8ff88c0440c587967f8e94bfb1216a"
 dependencies = [
  "phf_generator",
- "phf_shared",
+ "phf_shared 0.11.3",
 ]
 
 [[package]]
@@ -1767,7 +1901,7 @@ version = "0.11.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3c80231409c20246a13fddb31776fb942c38553c51e871f8cbd687a4cfb5843d"
 dependencies = [
- "phf_shared",
+ "phf_shared 0.11.3",
  "rand 0.8.6",
 ]
 
@@ -1780,6 +1914,15 @@ dependencies = [
  "siphasher",
 ]
 
+[[package]]
+name = "phf_shared"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e57fef6bc5981e38c2ce2d63bfa546861309f875b8a75f092d1d54ae2d64f266"
+dependencies = [
+ "siphasher",
+]
+
 [[package]]
 name = "picloud"
 version = "1.1.9"
@@ -1791,14 +1934,14 @@ dependencies = [
  "chrono",
  "figment",
  "hex",
- "hmac",
+ "hmac 0.12.1",
  "picloud-executor-core",
  "picloud-manager-core",
  "picloud-orchestrator-core",
  "picloud-shared",
  "serde",
  "serde_json",
- "sha2",
+ "sha2 0.10.9",
  "sqlx",
  "thiserror 1.0.69",
  "tokio",
@@ -1820,6 +1963,7 @@ dependencies = [
  "directories",
  "libc",
  "picloud-shared",
+ "postgres",
  "predicates",
  "reqwest",
  "rpassword",
@@ -1828,6 +1972,7 @@ dependencies = [
  "tempfile",
  "tokio",
  "toml",
+ "uuid",
 ]
 
 [[package]]
@@ -1892,7 +2037,7 @@ dependencies = [
  "data-encoding",
  "futures",
  "hex",
- "hmac",
+ "hmac 0.12.1",
  "lettre",
  "picloud-executor-core",
  "picloud-orchestrator-core",
@@ -1901,7 +2046,7 @@ dependencies = [
  "reqwest",
  "serde",
  "serde_json",
- "sha2",
+ "sha2 0.10.9",
  "sqlx",
  "thiserror 1.0.69",
  "tokio",
@@ -1953,11 +2098,11 @@ dependencies = [
  "async-trait",
  "base64",
  "chrono",
- "hmac",
+ "hmac 0.12.1",
  "rand 0.8.6",
  "serde",
  "serde_json",
- "sha2",
+ "sha2 0.10.9",
  "thiserror 1.0.69",
  "tokio",
  "tracing",
@@ -2010,7 +2155,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d1fe60d06143b2430aa532c94cfe9e29783047f06c0d7fd359a9a51b729fa25"
 dependencies = [
  "cfg-if",
- "cpufeatures",
+ "cpufeatures 0.2.17",
  "opaque-debug",
  "universal-hash",
 ]
@@ -2021,6 +2166,52 @@ version = "1.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c33a9471896f1c69cecef8d20cbe2f7accd12527ce60845ff44c153bb2a21b49"
 
+[[package]]
+name = "postgres"
+version = "0.19.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aacf632d0554ff75f58183694f41dc8999c8a3a43a386994d0ec2d034f1dfbe1"
+dependencies = [
+ "bytes",
+ "fallible-iterator",
+ "futures-util",
+ "log",
+ "tokio",
+ "tokio-postgres",
+]
+
+[[package]]
+name = "postgres-protocol"
+version = "0.6.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56201207dac53e2f38e848e31b4b91616a6bb6e0c7205b77718994a7f49e70fc"
+dependencies = [
+ "base64",
+ "byteorder",
+ "bytes",
+ "fallible-iterator",
+ "hmac 0.13.0",
+ "md-5 0.11.0",
+ "memchr",
+ "rand 0.10.1",
+ "sha2 0.11.0",
+ "stringprep",
+]
+
+[[package]]
+name = "postgres-types"
+version = "0.2.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8dc729a129e682e8d24170cd30ae1aa01b336b096cbb56df6d534ffec133d186"
+dependencies = [
+ "bytes",
+ "fallible-iterator",
+ "postgres-protocol",
+ "serde_core",
+ "serde_json",
+ "uuid",
+]
+
 [[package]]
 name = "potential_utf"
 version = "0.1.5"
@@ -2220,6 +2411,17 @@ dependencies = [
  "rand_core 0.9.5",
 ]
 
+[[package]]
+name = "rand"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2e8e8bcc7961af1fdac401278c6a831614941f6164ee3bf4ce61b7edb162207"
+dependencies = [
+ "chacha20",
+ "getrandom 0.4.2",
+ "rand_core 0.10.1",
+]
+
 [[package]]
 name = "rand_chacha"
 version = "0.3.1"
@@ -2258,6 +2460,12 @@ dependencies = [
  "getrandom 0.3.4",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63b8176103e19a2643978565ca18b50549f6101881c443590420e4dc998a3c69"
+
 [[package]]
 name = "redox_syscall"
 version = "0.5.18"
@@ -2426,8 +2634,8 @@ version = "0.9.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8573f03f5883dcaebdfcf4725caa1ecb9c15b2ef50c43a07b816e06799bb12d"
 dependencies = [
- "const-oid",
+ "const-oid 0.9.6",
- "digest",
+ "digest 0.10.7",
  "num-bigint-dig",
  "num-integer",
  "num-traits",
@@ -2626,8 +2834,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3bf829a2d51ab4a5ddf1352d8470c140cadc8301b2ae1789db023f01cedd6ba"
 dependencies = [
  "cfg-if",
- "cpufeatures",
+ "cpufeatures 0.2.17",
- "digest",
+ "digest 0.10.7",
 ]
 
 [[package]]
@@ -2637,8 +2845,19 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a7507d819769d01a365ab707794a4084392c824f54a7a6a7862f8c3d0892b283"
 dependencies = [
  "cfg-if",
- "cpufeatures",
+ "cpufeatures 0.2.17",
- "digest",
+ "digest 0.10.7",
+]
+
+[[package]]
+name = "sha2"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "446ba717509524cb3f22f17ecc096f10f4822d76ab5c0b9822c5f9c284e825f4"
+dependencies = [
+ "cfg-if",
+ "cpufeatures 0.3.0",
+ "digest 0.11.3",
 ]
 
 [[package]]
@@ -2672,7 +2891,7 @@ version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77549399552de45a898a580c1b41d445bf730df867cc44e6c0233bbc4b8329de"
 dependencies = [
- "digest",
+ "digest 0.10.7",
  "rand_core 0.6.4",
 ]
 
@@ -2784,7 +3003,7 @@ dependencies = [
  "rustls",
  "serde",
  "serde_json",
- "sha2",
+ "sha2 0.10.9",
  "smallvec",
  "thiserror 2.0.18",
  "tokio",
@@ -2823,7 +3042,7 @@ dependencies = [
  "quote",
  "serde",
  "serde_json",
- "sha2",
+ "sha2 0.10.9",
  "sqlx-core",
  "sqlx-mysql",
  "sqlx-postgres",
@@ -2846,7 +3065,7 @@ dependencies = [
  "bytes",
  "chrono",
  "crc",
- "digest",
+ "digest 0.10.7",
  "dotenvy",
  "either",
  "futures-channel",
@@ -2856,10 +3075,10 @@ dependencies = [
  "generic-array",
  "hex",
  "hkdf",
- "hmac",
+ "hmac 0.12.1",
  "itoa",
  "log",
- "md-5",
+ "md-5 0.10.6",
  "memchr",
  "once_cell",
  "percent-encoding",
@@ -2867,14 +3086,14 @@ dependencies = [
  "rsa",
  "serde",
  "sha1",
- "sha2",
+ "sha2 0.10.9",
  "smallvec",
  "sqlx-core",
  "stringprep",
  "thiserror 2.0.18",
  "tracing",
  "uuid",
- "whoami",
+ "whoami 1.6.1",
 ]
 
 [[package]]
@@ -2896,24 +3115,24 @@ dependencies = [
  "futures-util",
  "hex",
  "hkdf",
- "hmac",
+ "hmac 0.12.1",
  "home",
  "itoa",
  "log",
- "md-5",
+ "md-5 0.10.6",
  "memchr",
  "once_cell",
  "rand 0.8.6",
  "serde",
  "serde_json",
- "sha2",
+ "sha2 0.10.9",
  "smallvec",
  "sqlx-core",
  "stringprep",
  "thiserror 2.0.18",
  "tracing",
  "uuid",
- "whoami",
+ "whoami 1.6.1",
 ]
 
 [[package]]
@@ -3178,6 +3397,32 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "tokio-postgres"
+version = "0.7.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4dd8df5ef180f6364759a6f00f7aadda4fbbac86cdee37480826a6ff9f3574ce"
+dependencies = [
+ "async-trait",
+ "byteorder",
+ "bytes",
+ "fallible-iterator",
+ "futures-channel",
+ "futures-util",
+ "log",
+ "parking_lot",
+ "percent-encoding",
+ "phf 0.13.1",
+ "pin-project-lite",
+ "postgres-protocol",
+ "postgres-types",
+ "rand 0.10.1",
+ "socket2",
+ "tokio",
+ "tokio-util",
+ "whoami 2.1.2",
+]
+
 [[package]]
 name = "tokio-rustls"
 version = "0.26.4"
@@ -3436,7 +3681,7 @@ version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc1de2c688dc15305988b563c3854064043356019f97a4b46276fe734c4f07ea"
 dependencies = [
- "crypto-common",
+ "crypto-common 0.1.7",
  "subtle",
 ]
 
@@ -3530,6 +3775,15 @@ version = "0.11.1+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
+[[package]]
+name = "wasi"
+version = "0.14.7+wasi-0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "883478de20367e224c0090af9cf5f9fa85bed63a95c1abf3afc5c083ebc06e8c"
+dependencies = [
+ "wasip2",
+]
+
 [[package]]
 name = "wasip2"
 version = "1.0.3+wasi-0.2.9"
@@ -3554,6 +3808,15 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8dad83b4f25e74f184f64c43b150b91efe7647395b42289f38e50566d82855b"
 
+[[package]]
+name = "wasite"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "66fe902b4a6b8028a753d5424909b764ccf79b7a209eac9bf97e59cda9f71a42"
+dependencies = [
+ "wasi 0.14.7+wasi-0.2.4",
+]
+
 [[package]]
 name = "wasm-bindgen"
 version = "0.2.122"
@@ -3688,7 +3951,20 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5d4a4db5077702ca3015d3d02d74974948aba2ad9e12ab7df718ee64ccd7e97d"
 dependencies = [
  "libredox",
- "wasite",
+ "wasite 0.1.0",
+]
+
+[[package]]
+name = "whoami"
+version = "2.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "998767ef88740d1f5b0682a9c53c24431453923962269c2db68ee43788c5a40d"
+dependencies = [
+ "libc",
+ "libredox",
+ "objc2-system-configuration",
+ "wasite 1.0.2",
+ "web-sys",
 ]
 
 [[package]]

clients/typescript/src/subscribe.ts

@@ -29,6 +29,14 @@ export function subscribeTopic<T = unknown>(
   let lastEventId: string | undefined;
   let controller: AbortController | null = null;
   let backoffTimer: ReturnType<typeof setTimeout> | null = null;
+  // F-T-003: bound the 401-refresh loop. If onTokenExpired keeps
+  // returning a token that the server rejects (mis-issued refresh,
+  // server-side authz drift, …) we'd otherwise reconnect immediately
+  // forever with attempt=0 each iteration — the previous behavior.
+  // Three consecutive 401s within the loop give up and surface the
+  // error so the caller knows the credential is bad.
+  let consecutive401 = 0;
+  const MAX_CONSECUTIVE_401 = 3;
 
   const stop = () => {
     stopped = true;
@@ -61,6 +69,17 @@ export function subscribeTopic<T = unknown>(
     }
 
     if (res.status === 401) {
+      consecutive401 += 1;
+      if (consecutive401 >= MAX_CONSECUTIVE_401) {
+        opts.onError?.(
+          new Error(
+            `realtime subscribe stuck in 401-refresh loop (${consecutive401} consecutive); ` +
+              'check that onTokenExpired returns a credential the server accepts'
+          )
+        );
+        stop();
+        return;
+      }
       // Token expired / rejected — try to refresh, else give up.
       const fresh = opts.onTokenExpired ? await opts.onTokenExpired() : null;
       if (fresh) {
@@ -79,8 +98,10 @@ export function subscribeTopic<T = unknown>(
       return;
     }
 
-    // Connected — reset backoff and stream frames until the body ends.
+    // Connected — reset backoff and the 401 counter; a successful
+    // open proves the current credential works.
     attempt = 0;
+    consecutive401 = 0;
     try {
       await readStream(res.body, (frame) => {
         if (frame.id !== undefined) lastEventId = frame.id;

clients/typescript/tests/subscribe.test.ts

@@ -96,4 +96,30 @@ describe('subscribe', () => {
     await vi.waitFor(() => expect(onError).toHaveBeenCalled());
     unsubscribe();
   });
+
+  it('caps the 401-refresh loop after consecutive failures', async () => {
+    // onTokenExpired keeps returning a fresh-looking-but-still-rejected
+    // token. Without the cap the loop would reconnect forever.
+    const fetchMock = queuedFetch([
+      async () => emptyResponse(401),
+      async () => emptyResponse(401),
+      async () => emptyResponse(401),
+      async () => emptyResponse(401),
+      async () => emptyResponse(401)
+    ]);
+    const client = new PicloudClient({ baseURL: 'https://api.test', fetch: fetchMock });
+    const onError = vi.fn();
+    const onTokenExpired = vi.fn(() => 'never-good-enough');
+    const unsubscribe = client.subscribe('chat', () => {}, {
+      onTokenExpired,
+      onError
+    });
+    await vi.waitFor(() => expect(onError).toHaveBeenCalled(), { timeout: 1000 });
+    unsubscribe();
+    // The cap is 3 consecutive 401s — at most 3 fetches should have
+    // been issued before the loop bailed.
+    expect(fetchMock.mock.calls.length).toBeLessThanOrEqual(3);
+    const errMsg = String(onError.mock.calls[0]?.[0]);
+    expect(errMsg).toContain('401-refresh loop');
+  });
 });

crates/manager-core/src/triggers_api.rs

@@ -34,12 +34,51 @@ use crate::trigger_repo::{
     TriggerRepo, TriggerRepoError,
 };
 
-/// Minimum allowed queue visibility timeout. Anything shorter races the
+/// Hard floor on queue visibility timeout. Anything shorter is a typo
-/// dispatcher's per-message executor budget; reclaim would re-deliver
+/// in practice (the dispatcher itself ticks every 100ms; reclaim ticks
-/// the message before the handler returned. Picked to outlast a slow
+/// every 30s; an executor needs more wall-clock than this to do useful
-/// handler by a comfortable margin.
+/// work). Reject below this with a 422 + actionable error.
 const MIN_QUEUE_VISIBILITY_TIMEOUT_SECS: u32 = 30;
 
+/// Soft warning ceiling: when the configured visibility is shorter than
+/// the dispatcher's per-message executor budget (default 300s, see
+/// `DEFAULT_ASYNC_EXEC_TIMEOUT` in dispatcher.rs), a handler that runs
+/// for the full budget will be reclaimed mid-execution and the message
+/// double-delivered. Don't reject — short handlers are a valid choice
+/// — but log loudly so the operator can see the mismatch.
+const SAFE_VISIBILITY_VS_EXEC_BUDGET_SECS: u32 = 300;
+
+/// Validate the script-supplied visibility timeout. Hard-rejects below
+/// [`MIN_QUEUE_VISIBILITY_TIMEOUT_SECS`]; warn-logs (does not reject)
+/// when in `[MIN, SAFE)` because a handler running past `visibility_secs`
+/// will get double-delivered when reclaim sweeps the stale claim.
+///
+/// Extracted from the handler so it's unit-testable without spinning up
+/// the full Axum harness.
+fn validate_queue_visibility_timeout(secs: Option<u32>) -> Result<(), TriggersApiError> {
+    let Some(s) = secs else {
+        return Ok(()); // None → fall back to TriggerConfig's default.
+    };
+    if s < MIN_QUEUE_VISIBILITY_TIMEOUT_SECS {
+        return Err(TriggersApiError::Invalid(format!(
+            "visibility_timeout_secs must be >= {MIN_QUEUE_VISIBILITY_TIMEOUT_SECS} \
+             (shorter than the dispatcher's tick + reclaim cadence; \
+             a handler can't return before reclaim fires)"
+        )));
+    }
+    if s < SAFE_VISIBILITY_VS_EXEC_BUDGET_SECS {
+        tracing::warn!(
+            visibility_timeout_secs = s,
+            executor_budget_secs = SAFE_VISIBILITY_VS_EXEC_BUDGET_SECS,
+            "queue trigger visibility_timeout_secs is below the dispatcher's per-message \
+             executor budget; a handler that runs longer than {s}s will be reclaimed \
+             mid-execution and the message double-delivered. Either raise visibility or \
+             accept the at-least-once semantics for this queue."
+        );
+    }
+    Ok(())
+}
+
 #[derive(Clone)]
 pub struct TriggersState {
     pub triggers: Arc<dyn TriggerRepo>,
@@ -573,21 +612,7 @@ async fn create_queue_trigger(
             "queue_name must not be empty".into(),
         ));
     }
-    // Reject obviously-too-short visibility timeouts. The dispatcher
+    validate_queue_visibility_timeout(input.visibility_timeout_secs)?;
-    // budgets up to ~5 minutes of executor wall-clock per message
-    // (DEFAULT_ASYNC_EXEC_TIMEOUT in dispatcher.rs); a 10s visibility
-    // timeout would race the executor and cause the reclaim task to
-    // re-deliver the message before the first handler returned, so the
-    // queue would silently double-deliver. The audit's Low finding.
-    if let Some(secs) = input.visibility_timeout_secs {
-        if secs < MIN_QUEUE_VISIBILITY_TIMEOUT_SECS {
-            return Err(TriggersApiError::Invalid(format!(
-                "visibility_timeout_secs must be >= {MIN_QUEUE_VISIBILITY_TIMEOUT_SECS} \
-                 (shorter than the dispatcher's per-message executor budget; \
-                 reclaim would race the handler)"
-            )));
-        }
-    }
     validate_trigger_target(&*s.scripts, app_id, input.script_id).await?;
 
     let req = crate::trigger_repo::CreateQueueTrigger {
@@ -736,6 +761,44 @@ mod tests {
 
     use super::*;
     use crate::app_repo::{AppLookup, AppRepository};
+
+    #[test]
+    fn visibility_timeout_none_passes() {
+        assert!(validate_queue_visibility_timeout(None).is_ok());
+    }
+
+    #[test]
+    fn visibility_timeout_above_safe_passes() {
+        // ≥ 300s: safely above the executor budget, no warn.
+        assert!(validate_queue_visibility_timeout(Some(600)).is_ok());
+        assert!(validate_queue_visibility_timeout(Some(300)).is_ok());
+    }
+
+    #[test]
+    fn visibility_timeout_between_min_and_safe_warns_but_passes() {
+        // [30, 300): valid but the operator should know. We assert the
+        // call succeeds; the warn-log emission is a side effect tracing
+        // would surface in real ops — covered visually, not asserted.
+        assert!(validate_queue_visibility_timeout(Some(60)).is_ok());
+        assert!(validate_queue_visibility_timeout(Some(MIN_QUEUE_VISIBILITY_TIMEOUT_SECS)).is_ok());
+    }
+
+    #[test]
+    fn visibility_timeout_below_min_rejected() {
+        for too_short in [0u32, 1, 5, 10, MIN_QUEUE_VISIBILITY_TIMEOUT_SECS - 1] {
+            let err = validate_queue_visibility_timeout(Some(too_short)).unwrap_err();
+            match err {
+                TriggersApiError::Invalid(msg) => {
+                    assert!(
+                        msg.contains(&MIN_QUEUE_VISIBILITY_TIMEOUT_SECS.to_string()),
+                        "error should cite the minimum: {msg}"
+                    );
+                }
+                other => panic!("expected Invalid for {too_short}s, got {other:?}"),
+            }
+        }
+    }
+
     use crate::trigger_repo::{
         CreateCronTrigger, CreateEmailTrigger, CreateFilesTrigger, CreatePubsubTrigger,
         DeadLetterTriggerMatch, DocsTriggerMatch, EmailInboundTarget, FilesTriggerMatch,

crates/picloud-cli/Cargo.toml

@@ -40,3 +40,9 @@ predicates = "3"
 tempfile = "3"
 reqwest = { workspace = true, features = ["json", "blocking"] }
 libc = "0.2"
+# Synchronous Postgres driver used by the dead-letters integration test
+# to inject a row the replay path can act on. Smaller compile cost than
+# pulling sqlx into the CLI tree, and the existing tests are
+# blocking-style anyway.
+postgres = { version = "0.19", features = ["with-uuid-1", "with-serde_json-1"] }
+uuid = { version = "1", features = ["v4"] }

crates/picloud-cli/src/client.rs

@@ -399,6 +399,18 @@ impl Client {
         decode(resp).await
     }
 
+    /// `GET /api/v1/admin/apps/{id}/dead_letters/count`
+    pub async fn dead_letters_count(&self, app: &str) -> Result<DeadLetterCountDto> {
+        let resp = self
+            .request(
+                Method::GET,
+                &format!("/api/v1/admin/apps/{app}/dead_letters/count"),
+            )
+            .send()
+            .await?;
+        decode(resp).await
+    }
+
     /// `GET /api/v1/admin/apps/{id}/dead_letters?unresolved={bool}&limit={n}`
     pub async fn dead_letters_list(
         &self,
@@ -647,6 +659,11 @@ pub struct TriggerDto {
     pub details: Value,
 }
 
+#[derive(Debug, Deserialize)]
+pub struct DeadLetterCountDto {
+    pub unresolved: i64,
+}
+
 #[derive(Debug, Deserialize)]
 pub struct DeadLetterListDto {
     pub dead_letters: Vec<DeadLetterDto>,

crates/picloud-cli/src/cmds/dead_letters.rs

@@ -6,6 +6,18 @@ use crate::client::Client;
 use crate::config;
 use crate::output::{KvBlock, OutputMode, Table};
 
+/// `pic dead-letters count --app <slug>` — print the unresolved DL
+/// count for an app. Useful for headless probes (alerting / dashboards).
+pub async fn count(app: &str, mode: OutputMode) -> Result<()> {
+    let creds = config::resolve()?;
+    let client = Client::from_creds(&creds)?;
+    let resp = client.dead_letters_count(app).await?;
+    let mut table = Table::new(["unresolved"]);
+    table.row([resp.unresolved.to_string()]);
+    table.print(mode);
+    Ok(())
+}
+
 pub async fn ls(app: &str, unresolved: bool, limit: u32, mode: OutputMode) -> Result<()> {
     let creds = config::resolve()?;
     let client = Client::from_creds(&creds)?;

crates/picloud-cli/src/main.rs

@@ -466,6 +466,13 @@ enum TriggersCmd {
 
 #[derive(Subcommand)]
 enum DeadLettersCmd {
+    /// Print the unresolved DL count. Cheap probe for alerting /
+    /// dashboards — no row payloads, just the bare integer.
+    Count {
+        #[arg(long)]
+        app: String,
+    },
+
     /// List dead-letter rows for an app.
     Ls {
         #[arg(long)]
@@ -822,6 +829,9 @@ async fn main() -> ExitCode {
         Cmd::Triggers {
             cmd: TriggersCmd::CreateFromJson { app, kind, body },
         } => cmds::triggers::create_from_json(&app, &kind, &body, mode).await,
+        Cmd::DeadLetters {
+            cmd: DeadLettersCmd::Count { app },
+        } => cmds::dead_letters::count(&app, mode).await,
         Cmd::DeadLetters {
             cmd:
                 DeadLettersCmd::Ls {

crates/picloud-cli/tests/dead_letters.rs

@@ -46,6 +46,136 @@ fn ls_empty_app_succeeds() {
     assert_eq!(stdout.lines().count(), 1, "fresh app has no DL rows");
 }
 
+#[ignore = "needs DATABASE_URL pointing at a running Postgres"]
+#[test]
+fn count_returns_unresolved_total() {
+    let Some(fx) = common::fixture_or_skip() else {
+        return;
+    };
+    let env = common::admin_env(fx);
+    let slug = common::unique_slug("dl-count");
+    common::pic_as(&env)
+        .args(["apps", "create", &slug])
+        .assert()
+        .success();
+    let _guard = AppGuard::new(&env.url, &env.token, &slug);
+
+    let out = common::pic_as(&env)
+        .args(["dead-letters", "count", "--app", &slug])
+        .output()
+        .expect("dl count");
+    assert!(out.status.success(), "count failed: {out:?}");
+    let stdout = String::from_utf8(out.stdout).unwrap();
+    let header = stdout.lines().next().expect("header");
+    assert_eq!(common::cells(header), vec!["unresolved"]);
+    let row = stdout.lines().nth(1).expect("data row");
+    assert_eq!(common::cells(row), vec!["0"]);
+}
+
+#[ignore = "needs DATABASE_URL pointing at a running Postgres"]
+#[test]
+fn replay_against_real_dl_row_succeeds() {
+    use postgres::{Client as PgClient, NoTls};
+    use uuid::Uuid;
+
+    let Some(fx) = common::fixture_or_skip() else {
+        return;
+    };
+    let env = common::admin_env(fx);
+    let (script_id_str, guard) = common::deploy_fixture(&env, "dl-replay", "hello.rhai");
+    let app_slug = guard.slug().to_string();
+
+    // Need the app's UUID to inject the DL row. Resolve via the admin
+    // GET — picloud accepts either slug or id, returns both.
+    let app_id: String = reqwest::blocking::Client::new()
+        .get(format!("{}/api/v1/admin/apps/{}", env.url, app_slug))
+        .bearer_auth(&env.token)
+        .send()
+        .expect("apps_get")
+        .json::<serde_json::Value>()
+        .expect("apps_get json")["id"]
+        .as_str()
+        .expect("app id")
+        .to_string();
+
+    // Direct INSERT — no admin endpoint creates DL rows; the real ones
+    // come from the dispatcher's retry-exhaust path, which would take
+    // minutes to drive. The replay path doesn't care how the row got
+    // there, only that it exists, belongs to this app, and is
+    // unresolved.
+    let db_url =
+        std::env::var("DATABASE_URL").expect("DATABASE_URL required for replay happy-path test");
+    let mut pg = PgClient::connect(&db_url, NoTls).expect("postgres connect");
+    let dl_id = Uuid::new_v4();
+    let app_uuid = Uuid::parse_str(&app_id).expect("app uuid");
+    let script_uuid = Uuid::parse_str(&script_id_str).expect("script uuid");
+    // Payload shape must round-trip through the dispatcher: source="kv"
+    // matches a KV TriggerEvent, op="set" is a KvEventOp, and the
+    // service_kind=`kv` outbox row gets routed by resolve_trigger.
+    let payload = serde_json::json!({
+        "source": "kv",
+        "op": "set",
+        "kv": {
+            "collection": "x",
+            "key": "y",
+            "value": { "v": 1 }
+        }
+    });
+    pg.execute(
+        "INSERT INTO dead_letters (
+            id, app_id, original_event_id, source, op, trigger_id, script_id,
+            payload, attempt_count, first_attempt_at, last_attempt_at, last_error
+         ) VALUES ($1, $2, $3, 'kv', 'set', NULL, $4, $5, 1, NOW(), NOW(), 'forced')",
+        &[&dl_id, &app_uuid, &Uuid::new_v4(), &script_uuid, &payload],
+    )
+    .expect("insert synthetic DL row");
+
+    // Verify CLI count picks the row up.
+    let out = common::pic_as(&env)
+        .args(["dead-letters", "count", "--app", &app_slug])
+        .output()
+        .expect("dl count");
+    let stdout = String::from_utf8(out.stdout).unwrap();
+    assert!(
+        stdout.lines().nth(1) == Some("1"),
+        "count should be 1: {stdout}"
+    );
+
+    // Replay — pic exits 0, the server resolves the row with reason=replayed.
+    common::pic_as(&env)
+        .args([
+            "dead-letters",
+            "replay",
+            "--app",
+            &app_slug,
+            &dl_id.to_string(),
+        ])
+        .assert()
+        .success()
+        .stdout(predicate::str::contains("Replayed dead-letter"));
+
+    // Verify the row is now resolved with reason=replayed.
+    let row = pg
+        .query_one(
+            "SELECT resolution FROM dead_letters WHERE id = $1",
+            &[&dl_id],
+        )
+        .expect("dl row exists post-replay");
+    let resolution: Option<String> = row.get(0);
+    assert_eq!(resolution.as_deref(), Some("replayed"));
+
+    // And the unresolved count drops back to 0.
+    let out = common::pic_as(&env)
+        .args(["dead-letters", "count", "--app", &app_slug])
+        .output()
+        .expect("dl count");
+    let stdout = String::from_utf8(out.stdout).unwrap();
+    assert!(
+        stdout.lines().nth(1) == Some("0"),
+        "count should be 0 after replay: {stdout}"
+    );
+}
+
 #[ignore = "needs DATABASE_URL pointing at a running Postgres"]
 #[test]
 fn resolve_marks_row_resolved() {

dashboard/src/routes/apps/[slug]/users/invitations/+page.svelte

@@ -1,11 +1,10 @@
 <script lang="ts">
 	import { base } from '$app/paths';
 	import { page } from '$app/state';
-	import { api, ApiError, type App, type Invitation } from '$lib/api';
+	import { api, ApiError, type Invitation } from '$lib/api';
 	import ConfirmModal from '$lib/ConfirmModal.svelte';
 
 	let slug = $derived(page.params.slug ?? '');
-	let app = $state<App | null>(null);
 	let invitations = $state<Invitation[]>([]);
 	let loading = $state(false);
 	let error = $state<string | null>(null);
@@ -26,14 +25,6 @@
 	let toRevoke = $state<Invitation | null>(null);
 	let revoking = $state(false);
 
-	async function loadApp() {
-		try {
-			app = await api.apps.get(slug);
-		} catch (e) {
-			error = e instanceof ApiError ? e.message : String(e);
-		}
-	}
-
 	async function loadInvitations() {
 		loading = true;
 		error = null;
@@ -49,7 +40,6 @@
 
 	$effect(() => {
 		void slug;
-		void loadApp();
 		void loadInvitations();
 	});