fix(hooks,lib): fix hook detection and parsing edge cases (#2405)

* fix(hooks,lib): fix hook detection and parsing edge cases

- auto-tmux-dev: dev\b -> dev(?![\w-]) so one-shot dev-build/dev-docs scripts
  are not detached into tmux; align command shapes (yarn run dev, bun dev) with
  pre-bash-dev-server-block.js DEV_PATTERN.
- pre-bash-commit-quality: skip obvious non-secret placeholders (env refs,
  ${...}, <...>, whitelisted tokens) in the api-key rule without suppressing
  real high-entropy secrets; make -m message extraction quote- and
  escaped-quote-aware so `-m "fix: \"x\""` / apostrophes are not truncated.
- pre-compact: annotate the CURRENT worktree's session (match **Worktree:** /
  legacy **Project:**) instead of the newest *-session.tmp across all projects,
  layered onto the LLM-summary flow from #2388; a present-but-blank Worktree
  header is treated as non-legacy (no foreign project fallback).
- shell-substitution: stop double-appending a trailing backslash in an
  unterminated backtick span.
- utils readStdinJson: on overflow, settle and resolve {} immediately (clear
  timer + listeners) instead of waiting for end/timeout and parsing a partial
  prefix; surface the overflow on stderr.

Regression tests added/extended (new tests/hooks/pre-compact.test.js).

Addresses review feedback on #2405. The earlier block-no-verify change was
dropped: its message-value skip on merge/cherry-pick/am/rebase would let
`git rebase -m --no-verify` bypass the hook (rebase's -m is the boolean
--merge), a false-negative worse than the contrived false-positive it fixed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(ci): align hook fixtures and drain oversized stdin

---------

Co-authored-by: djpjronline-netizen <276112803+djpjronline-netizen@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: haelyra <49814733+haelyra@users.noreply.github.com>

scripts/lib/shell-substitution.js

@@ -55,8 +55,12 @@ function extractCommandSubstitutions(input) {
           if (i + 1 < source.length) {
             body += source[i + 1];
             i += 2;
-            continue;
+          } else {
+            // Trailing backslash at end of an unterminated span: advance past
+            // it so it is not appended a second time by the fallthrough below.
+            i += 1;
           }
+          continue;
         }
         if (inner === '`') {
           break;
@@ -85,8 +89,12 @@ function extractCommandSubstitutions(input) {
           if (i + 1 < source.length) {
             body += source[i + 1];
             i += 2;
-            continue;
+          } else {
+            // Trailing backslash at end of an unterminated span: advance past
+            // it so it is not appended a second time by the fallthrough below.
+            i += 1;
           }
+          continue;
         }
         if (inner === "'" && !bodyInDouble && innerPrev !== '\\') {
           bodyInSingle = !bodyInSingle;
@@ -213,8 +221,12 @@ function extractSubshellGroups(input) {
           if (i + 1 < source.length) {
             body += source[i + 1];
             i += 2;
-            continue;
+          } else {
+            // Trailing backslash at end of an unterminated span: advance past
+            // it so it is not appended a second time by the fallthrough below.
+            i += 1;
           }
+          continue;
         }
         if (inner === "'" && !bodyInDouble && innerPrev !== '\\') {
           bodyInSingle = !bodyInSingle;
@@ -374,8 +386,12 @@ function extractBraceGroups(input) {
           if (i + 1 < source.length) {
             body += source[i + 1];
             i += 2;
-            continue;
+          } else {
+            // Trailing backslash at end of an unterminated span: advance past
+            // it so it is not appended a second time by the fallthrough below.
+            i += 1;
           }
+          continue;
         }
         if (inner === "'" && !bodyInDouble && innerPrev !== '\\') {
           bodyInSingle = !bodyInSingle;