Trim verbose comments

Strip explanatory paragraphs and cross-reference jargon
("Mirrors X", "Shared with Y", etc.) from comments introduced
on this branch. Keep only the WHY — the parts of the design
intent that aren't already evident from method names and
short bodies. Pre-existing comments on methods this branch
didn't author stay as-is.

lib/open_project/text_formatting/filters/mention_filter.rb

@@ -49,13 +49,11 @@ module OpenProject::TextFormatting
 
       private
 
-      # Doc-level preload so a note with N user/group/WP mentions costs
-      # a bounded number of SELECTs rather than one per mention. WP
-      # mentions need the unscoped record (label) plus a separate
-      # visibility id pluck (anchor-vs-text gating); principals fold the
-      # two concerns into a single visibility-scoped fetch since
-      # invisible principals have no plain-text render path — they fall
-      # back to the literal envelope text instead.
+      # WP labels resolve regardless of viewer (so an inaccessible WP
+      # still renders its current formatted_id); a separate id pluck
+      # gates anchor-vs-text. Principals collapse the two concerns into
+      # one visibility-scoped fetch — invisible users and groups fall
+      # back to the literal envelope text.
       def preload_mentions
         preload_work_package_mentions
         preload_principal_mentions
@@ -70,8 +68,6 @@ module OpenProject::TextFormatting
         end
 
         scope = WorkPackage.where(id: ids)
-        # Static-HTML channels need `type` and `status` to render
-        # quickinfo envelopes as anchors instead of `<opce-*>` widgets.
         scope = scope.includes(:type, :status) if context[:as_static_html]
         @mentioned_work_packages = scope.index_by(&:id)
         @visible_mentioned_ids = WorkPackage.visible.where(id: ids).pluck(:id).to_set
@@ -118,8 +114,6 @@ module OpenProject::TextFormatting
       def work_package_mention(work_package, mention)
         return Nokogiri::XML::Text.new(work_package.formatted_id, mention.document) if text_only?(work_package)
 
-        # Match the label and URL convention used for `#N` text references
-        # elsewhere in the markdown pipeline.
         case mention.text.count("#")
         when 3 then work_package_quickinfo(work_package, detailed: true)
         when 2 then work_package_quickinfo(work_package, detailed: false)
@@ -127,12 +121,8 @@ module OpenProject::TextFormatting
         end
       end
 
-      # Plain-text channels and inaccessible WPs both render the
-      # `formatted_id` without an anchor or quickinfo widget — the
-      # latter would resolve to a hover-card endpoint the recipient
-      # can't reach. Mirrors `LinkHandlers::WorkPackages#text_only?`,
-      # which gates the matching decision for `#N` text references; keep
-      # the two in sync.
+      # The hover-card endpoint a quickinfo would link to is unreachable
+      # for plain-text recipients and for viewers without view permission.
       def text_only?(work_package)
         context[:as_text] || @visible_mentioned_ids.exclude?(work_package.id)
       end
@@ -147,11 +137,8 @@ module OpenProject::TextFormatting
                                                           detailed: }
       end
 
-      # Static fallback shared with the PatternMatcherFilter's `##`/`###`
-      # path so envelope-driven and text-driven references render the same
-      # shape in channels that cannot hydrate the custom element. Always
-      # uses the WP's current `formatted_id`, normalising any historical
-      # alias the envelope may have been authored with.
+      # Uses the WP's current `formatted_id` rather than the envelope text,
+      # so a renamed identifier doesn't leave a stale label in the mailer.
       def work_package_static_macro(work_package, detailed:)
         label = OpenProject::TextFormatting::Helpers::StaticMacroLabel
                   .call(work_package, label: work_package.formatted_id, detailed:)
@@ -172,12 +159,6 @@ module OpenProject::TextFormatting
                 })
       end
 
-      # WP label resolution is unscoped (preloaded above); visibility is
-      # gated separately in `text_only?` so an inaccessible WP renders
-      # its current formatted_id rather than the envelope text the
-      # author originally typed. Principals stay visibility-gated at the
-      # preload — there's no equivalent text-only render path for users
-      # or groups, so invisible principals fall back to the literal text.
       def class_from_mention(mention)
         id = mention_id(mention)&.to_i
         case mention.attributes["data-type"].value

lib/open_project/text_formatting/filters/plain_text_output_filter.rb

@@ -30,10 +30,8 @@
 
 module OpenProject::TextFormatting
   module Filters
-    # Final stage of the plain-text pipeline. Earlier filters resolve
-    # mentions and macros to their text-mode shapes (driven by
-    # `context[:as_text]`); this stage collapses any remaining markup
-    # so the pipeline output is suitable for `text/plain` bodies.
+    # Final stage of the `markdown_as_text` pipeline — strips remaining
+    # markup so the output is safe for `text/plain` bodies.
     class PlainTextOutputFilter < HTML::Pipeline::Filter
       def call
         doc.text

lib/open_project/text_formatting/formats/markdown/static_html_formatter.rb

@@ -30,13 +30,10 @@
 
 module OpenProject::TextFormatting::Formats
   module Markdown
-    # Static-HTML sibling of `Markdown::Formatter`. Shares the same filter
-    # chain so identifier resolution, mention handling, and link rendering
-    # stay consistent, but signals `context[:as_static_html]` so matchers
-    # and filters emit server-rendered anchors in place of JS-hydrated
-    # custom elements. Intended for channels that cannot run JS — HTML
-    # mailers, server-side previews, archival exports — where dynamic
-    # widgets would collapse to empty placeholders.
+    # Inherits `Markdown::Formatter`'s filter chain but signals
+    # `context[:as_static_html]` so matchers emit server-rendered
+    # anchors instead of JS-hydrated custom elements. For channels
+    # that can't run JS — HTML mailers, server-side previews.
     class StaticHtmlFormatter < Formatter
       def initialize(context)
         super(context.merge(as_static_html: true))

lib/open_project/text_formatting/formats/markdown/text_formatter.rb

@@ -30,11 +30,9 @@
 
 module OpenProject::TextFormatting::Formats
   module Markdown
-    # Text-output sibling of `Markdown::Formatter`. Shares the matcher and
-    # mention pipeline with the rich renderer so identifier resolution
-    # stays consistent across channels, then collapses the final DOM to
-    # text via `PlainTextOutputFilter`. Intended for plain/text mailers
-    # and other channels where HTML would be a foreign body.
+    # Runs the matcher and mention pipeline, then collapses the DOM to
+    # text via `PlainTextOutputFilter`. For `text/plain` mailers and
+    # other channels where HTML would be a foreign body.
     class TextFormatter < OpenProject::TextFormatting::Formats::BaseFormatter
       def initialize(context)
         super(context.merge(as_text: true))

lib/open_project/text_formatting/helpers/static_macro_label.rb

@@ -30,16 +30,9 @@
 
 module OpenProject::TextFormatting
   module Helpers
-    # Composes the anchor text for a work-package quickinfo macro rendered
-    # in a static-HTML channel (mailers, server-side previews) — channels
-    # that cannot hydrate the JS-driven `<opce-macro-wp-quickinfo>` widget
-    # and so flatten the macro to an `<a>` whose text must carry enough
-    # context for a reader to recognise the reference: type, optional
-    # status, the identifier label, and the subject.
-    #
-    # Shared between the text-reference path (`LinkHandlers::WorkPackages`)
-    # and the envelope path (`Filters::MentionFilter`) so both render the
-    # same shape for the same WP.
+    # Anchor text for the static-HTML form of a WP quickinfo macro:
+    # `[status ]type label: subject`. Used in channels (HTML mailers,
+    # server-side previews) that can't hydrate the `<opce-*>` widget.
     module StaticMacroLabel
       def self.call(work_package, label:, detailed:)
         parts = []

lib/open_project/text_formatting/matchers/link_handlers/work_packages.rb

@@ -111,13 +111,8 @@ module OpenProject::TextFormatting::Matchers
                                                   data: { id:, display_id:, detailed: }
       end
 
-      # Static fallback for channels that cannot hydrate the quickinfo
-      # custom element. Composes type, optional status, label, and subject
-      # into the anchor; unresolved references collapse to the bare label.
-      # The label is the matched identifier (potentially a historical alias)
-      # to preserve what the author wrote — the `<mention>` envelope path
-      # in `MentionFilter` instead normalises to the WP's current
-      # `formatted_id`.
+      # The label keeps what the author wrote (possibly a historical
+      # alias) so the rendered text matches the source markdown.
       def render_static_work_package_macro(work_package, label, detailed:)
         return label unless work_package
 
@@ -144,12 +139,8 @@ module OpenProject::TextFormatting::Matchers
                 })
       end
 
-      # Plain-text channels and inaccessible WPs both render the label
-      # without an anchor or quickinfo. Visibility is checked only when a
-      # WP was preloaded — a nil work_package means a classic-mode render
-      # or an unresolved reference, neither of which needs gating. Mirrors
-      # `MentionFilter#text_only?`, which gates the same decision for
-      # `<mention>` envelopes; keep the two in sync.
+      # A nil WP means classic mode skipped the preload, or the reference
+      # didn't resolve — neither case needs visibility gating.
       def text_only?(work_package)
         context[:as_text] || (work_package && !preload_cache.visible?(work_package.id))
       end

lib/open_project/text_formatting/matchers/resource_links_matcher.rb

@@ -69,11 +69,9 @@ module OpenProject::TextFormatting
     #     identifier:version:1.0.0
     #     identifier:source:some/file
     class ResourceLinksMatcher < RegexMatcher
-      # Per-render preload state shared between the matcher and the link
-      # handler. Pairs unscoped label resolution (`lookup`) with viewer-scoped
-      # link gating (`visible_ids`) so a single render computes both with a
-      # bounded number of round-trips and renders consistent labels for
-      # invisible WPs.
+      # Unscoped label resolution (`lookup`) paired with viewer-scoped
+      # link gating (`visible_ids`), so the link handler renders the
+      # same label for everyone and decides anchor-vs-text per viewer.
       class WorkPackagePreloadCache
         attr_reader :lookup, :visible_ids
 
@@ -90,8 +88,7 @@ module OpenProject::TextFormatting
           visible_ids.include?(work_package_id)
         end
 
-        # Per-process frozen singleton returned when no preload is in
-        # scope — not a factory; callers must not mutate it.
+        # Frozen singleton, not a factory — callers must not mutate it.
         EMPTY = new(lookup: {}.freeze, visible_ids: Set.new.freeze).freeze
       end
 
@@ -156,16 +153,13 @@ module OpenProject::TextFormatting
         ]
       end
 
-      # The active preload cache for the current render, or an empty
-      # singleton when no preload is in scope (classic mode, no `#N`
-      # references, or rendering outside `with_preloaded_resources`).
       def self.current_cache
         RequestStore.store[CACHE_KEY] || WorkPackagePreloadCache::EMPTY
       end
 
-      # Doc-level preload called by `PatternMatcherFilter`. Save/restores
-      # the cache so a nested `format_text` (e.g. custom-field formatter
-      # re-entering the pipeline) doesn't clobber the outer render.
+      # Save/restore so a nested `format_text` (e.g. a custom-field
+      # formatter re-entering the pipeline) doesn't clobber the outer
+      # render's cache.
       def self.with_preloaded_resources(doc, context)
         previous = RequestStore.store[CACHE_KEY]
         return yield unless preload_required?(context)
@@ -179,12 +173,8 @@ module OpenProject::TextFormatting
         RequestStore.store[CACHE_KEY] = previous
       end
 
-      # Two channels need the WP record at render time: semantic mode (to
-      # resolve `PROJ-7` to a row) and static-HTML output (to compose the
-      # type/subject anchor of a quickinfo macro). Classic-mode rich HTML
-      # and the as-text channel both render from the matched id alone —
-      # the latter short-circuits on `text_only?` before consulting the
-      # cache.
+      # Semantic mode needs the row to map `PROJ-7` to an id; static-HTML
+      # output needs `type`/`subject` to compose the quickinfo anchor.
       def self.preload_required?(context)
         Setting::WorkPackageIdentifier.semantic? || context[:as_static_html]
       end
@@ -215,22 +205,10 @@ module OpenProject::TextFormatting
         identifier
       end
 
-      # Label resolution is unscoped: a reference to an inaccessible
-      # work package still renders as its semantic identifier (e.g.
-      # `DCP-1`), just without a navigable anchor. Visibility is
-      # captured separately so the link handler can pick anchor-vs-text
-      # per WP without re-querying.
-      #
-      # Two SELECTs in the common case: one unscoped fetch by identifier,
-      # one visibility-scoped id pluck. A third targeted SELECT fires
-      # for historical aliases — the loaded row carries only the current
-      # identifier, so unmapped inputs are filled in from
-      # `WorkPackageSemanticAlias`. Static-HTML channels also eager-load
-      # `:type` and `:status` so the link handler can render the
-      # static-anchor variant of `##`/`###` macros without N+1 queries —
-      # those associations are the metadata a reader needs to recognise a
-      # WP reference flattened to text. Anything beyond that (project,
-      # versions, custom fields) stays out of this preload.
+      # Two SELECTs in the common case (unscoped fetch + visibility id
+      # pluck), a third when historical aliases need resolving. Static-
+      # HTML output additionally needs `:type` and `:status` to compose
+      # the anchor for `##`/`###` macros.
       def self.build_cache(identifiers, context = {})
         scope = WorkPackage.where_display_id_in(*identifiers)
         scope = if context[:as_static_html]