ci: declare workflow_dispatch input types so Gitea renders the dispatch form

Gitea (1.26.2) builds the "Run workflow" dialog from each input's `type:`.
With no type declared, the form renders a branch selector and NO input fields,
so a manual run silently takes every default -- and for release_tag: '' that
means env.RELEASE_TAG resolves EMPTY, the variant tag list becomes `<image>:`,
and the run dies on an invalid docker reference only AFTER paying the full base
+ smoke cost (~70 min). Net effect: the `smoke_only` escape hatch documented in
this file's own header has been unreachable from the UI for its entire
existence. Found 2026-09-06 while trying to use it to validate three new smoke
assertions before cutting v1.8.13.

Typed as `string`, deliberately, even though promote_latest/smoke_only read as
booleans: all six consumption sites compare strings against 'true'
(inputs.smoke_only != 'true' at both build-variant gates,
inputs.promote_latest == 'true' at both promote gates) or interpolate into
env.PROMOTE_LATEST. A boolean-typed input yields a real boolean, so `!= 'true'`
would compare across types and could invert a publish gate silently rather than
fail loudly. This keeps the change a pure rendering fix with zero semantic
delta; switching to boolean would require re-auditing all six call sites.

Validated locally with CI's own pinned tools before pushing, because lint is
the only gate on this file: actionlint 1.7.7 exit 0 (clean baseline before the
edit, clean after), shellcheck 0.10.0 -S error exit 0 across all 17 shell
files, and a pyyaml structural check confirming the three inputs still carry
string defaults, the `v*` tag trigger is intact, and all 9 jobs still parse.

.gitea/workflows/docker-publish.yml

@@ -33,18 +33,39 @@ on:
       - 'v*'
   workflow_dispatch:
     inputs:
+      # `type:` is REQUIRED for Gitea to render these fields in the "Run
+      # workflow" dialog. Without it (Gitea 1.26.2) the dispatch form shows a
+      # branch selector and NO inputs at all, so a manual run silently uses
+      # every default — which for `release_tag: ''` means RELEASE_TAG resolves
+      # empty, the variant tag list becomes `<image>:`, and the run dies on an
+      # invalid reference AFTER paying the full base + smoke cost (~70 min).
+      # That made the documented `smoke_only` escape hatch below unreachable
+      # from the UI for its whole existence; found 2026-09-06 trying to use it.
+      #
+      # Deliberately `string` and not `boolean`, even though these two read as
+      # flags: every consumption is a STRING comparison against 'true'
+      # (`inputs.smoke_only != 'true'` at the build-variant gates,
+      # `inputs.promote_latest == 'true'` at the promote gates) plus string
+      # interpolation into env.PROMOTE_LATEST. A boolean-typed input yields a
+      # real boolean, so `!= 'true'` would compare across types and could
+      # invert a publish gate rather than fail loudly. Changing the type here
+      # would mean re-auditing all six call sites; keeping it string is a
+      # rendering fix with provably zero semantic change.
       release_tag:
         description: 'Release tag to publish (e.g. v1.0.0). Used only for workflow_dispatch runs.'
         required: false
         default: ''
+        type: string
       promote_latest:
         description: 'Update latest aliases (default true for tag-push, false for manual test runs)'
         required: false
         default: 'false'
+        type: string
       smoke_only:
-        description: 'Build base + run both smoke jobs against HEAD, then stop. Publishes nothing. Use to validate smoke assertions without cutting a tag.'
+        description: 'Build base + run both smoke jobs against HEAD, then stop. Publishes nothing. Use to validate smoke assertions without cutting a tag. Set to the literal string true.'
         required: false
         default: 'false'
+        type: string
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}